*) http: Enforce that fully qualified uri-paths not to be forward-proxied
have an http(s) scheme, and that the ones to be forward proxied have a
hostname, per HTTP specifications.
trunk patch: http://svn.apache.org/r1895914http://svn.apache.org/r1895921
2.4.x patch: https://patch-diff.githubusercontent.com/raw/apache/httpd/pull/286.patch
backport PR: https://github.com/apache/httpd/pull/286
+1: ylavic, minfrin, gbechis
mod_proxy: Detect unix: scheme syntax errors at load time.
* modules/proxy/mod_proxy.c(add_pass, add_member, set_proxy_param,
proxysection):
Check return value of ap_proxy_de_socketfy().
* modules/proxy/proxy_util.c(ap_proxy_get_worker_ex):
Check return value of ap_proxy_de_socketfy().
http: Enforce that fully qualified uri-paths not to be forward-proxied
have an http(s) scheme, and that the ones to be forward proxied have a
hostname, per HTTP specifications.
The early checks avoid failing the request later on and thus save cycles
for those invalid cases.
Submitted by: ylavic
Reviewed by: ylavic, minfrin, gbechis
Closes#286
git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1895955 13f79535-47bb-0310-9956-ffa450edef68
r1887337, r1887340, r1887342, r1887343, r1887360, r1887364,
r1887923, r1887965, r1887993, r1888006, r1888083, r1888084,
r1888723, r1888724, r1888726, r1888729, r1889788] from trunk:
*) core/mod_ssl/mod_md:
- adding new ap_ssl_*() functions for a backward
compatible replacement of the major optional mod_ssl functions. This
allows other ssl modules to work without impersonating mod_ssl and
also allows different ssl modules being active on separate ports.
- latest mod_md with support for multiple certificates per domain
and ECDSA certificates. Removed ACMEv1 support.
- Interworking mod_md and ssl modules changed to exchange PEM strings
instead of file paths for ACME challenges.
- core/mod_ssl/mod_md: adding OCSP response provisioning as core feature.
git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1889793 13f79535-47bb-0310-9956-ffa450edef68
"[mod_dav_fs etag handling] should really honor the FileETag setting".
- It now does.
- Add "Digest" to FileETag directive, allowing a strong ETag to be
generated using a file digest.
- Add ap_make_etag_ex() and ap_set_etag_fd() to allow full control over
ETag generation.
- Add concept of "binary notes" to request_rec, allowing packed bit flags
to be added to a request.
- First binary note - AP_REQUEST_STRONG_ETAG - allows modules to force
the ETag to a strong ETag to comply with RFC requirements, such as those
mandated by various WebDAV extensions.
Be defensive when the request is missing.
Remove tabs.
Use a dedicated constant for the base64 sha1 length.
Be defensive when calculating the digest. Make sure the offset is initialised
to zero before reading the current offset.
Seek to the start of the file when calculating the ETag.
Add log numbers to util_etag.c.
Add MMAP support to ETag generation.
Use a brigade instead of direct reads, allow APR to handle MMAP.
Bump the logno.
Submitted by: minfrin
Reviewed by: minfrin, jim, ylavic
git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1887384 13f79535-47bb-0310-9956-ffa450edef68
core: ap_getline_core() reads nothing for n == 0.
PR62199: add worker parameter ResponseFieldSize to mod_proxy
Submitted By: Hank Ibell
Committed By: covener
add log id for r1828926
core: Add and handle AP_GETLINE_NOSPC_EOL flag in ap_rgetline_core().
This tells the ap_getline() family of functions to consume the end of line
when the buffer is exhausted.
PR 62198.
mod_proxy_http: make use of AP_GETLINE_NOSPC_EOL in ap_proxygetline().
Fixes response header thrown away after the previous one was considered too
large and truncated.
PR 62196.
core: forward flags to recursive/folding call to ap_rgetline_core().
We still need them when folding, other than AP_GETLINE_FOLD itself of course.
mod_proxy_http: follow up to r1829573: remain EBCDIC friendly.
Keep using ap_rgetline() as before r1829573, since ap_rgetline_core() is
EBCDIC agnostic.
Submitted by: ylavic, covener, covener, ylavic, ylavic, ylavic, ylavic
Reviewed by: ylavic, covener, rpluem
git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1834093 13f79535-47bb-0310-9956-ffa450edef68
Use of the ap_get_basic_auth_pw() by third-party modules outside of the
authentication phase may lead to authentication requirements being
bypassed.
Merge r1796348 from trunk:
core: Deprecate ap_get_basic_auth_pw() and add ap_get_basic_auth_components().
Submitted By: Emmanuel Dreyfus <manu netbsd.org>, jchampion, coverner
Reviewed by: covener, ylavic, jim
git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1796855 13f79535-47bb-0310-9956-ffa450edef68
r1772419 | covener | 2016-12-02 19:10:53 -0500 (Fri, 02 Dec 2016) | 7 lines
Merge r1772418 from trunk:
loop in checking response headers
w/ HTTPProtocolOptions Unsafe
------------------------------------------------------------------------
r1772236 | wrowe | 2016-12-01 11:29:27 -0500 (Thu, 01 Dec 2016) | 8 lines
Appears we cannot disallow this whitespace, since the chunk BNF coexisted
with the implied *LWS rule, before RFC7230 eliminated the later. Whether
this is actually OWS or BWS is an editorial decision beyond our pay grade.
Backports: r1765475
Submitted by: wrowe
------------------------------------------------------------------------
r1771697 | rpluem | 2016-11-28 04:59:00 -0500 (Mon, 28 Nov 2016) | 4 lines
Merge r1771690 from trunk:
* Fix numbers count in comment.
------------------------------------------------------------------------
r1771696 | rpluem | 2016-11-28 04:56:42 -0500 (Mon, 28 Nov 2016) | 1 line
* Revert 1771372: As Bill points out correctly. Only backport trunk revisions to this branch.
------------------------------------------------------------------------
r1771372 | rpluem | 2016-11-25 14:55:18 -0500 (Fri, 25 Nov 2016) | 1 line
* Fix numbers count in comment.
------------------------------------------------------------------------
r1770870 | wrowe | 2016-11-22 13:44:21 -0500 (Tue, 22 Nov 2016) | 3 lines
Optimize away one more strchr.
Backports: 1770869
------------------------------------------------------------------------
r1770868 | wrowe | 2016-11-22 13:34:25 -0500 (Tue, 22 Nov 2016) | 8 lines
List discussion resulted in rejecting all but SP characters in the request
line, but in the strict mode prioritize excessive space testing over bad
space testing (which is captured later) and make both more efficient
(at this test ll[0] is already whitespace or \0 char). Also correct a comment.
Backports: r1770867
Submitted by: wrowe
------------------------------------------------------------------------
r1770846 | covener | 2016-11-22 09:32:45 -0500 (Tue, 22 Nov 2016) | 5 lines
Merge r1770817 from trunk:
Removing unused warning after r1764961 changes.
------------------------------------------------------------------------
r1770789 | covener | 2016-11-21 20:58:06 -0500 (Mon, 21 Nov 2016) | 25 lines
Merge r1770786 from trunk:
remove Location: header checks for absolute URL
https://tools.ietf.org/html/rfc7231#section-7.1.2
The "Location" header field is used in some responses to refer to a
specific resource in relation to the response. The type of
relationship is defined by the combination of request method and
status code semantics.
Location = URI-reference
The field value consists of a single URI-reference. When it has the
form of a relative reference ([RFC3986], Section 4.2), the final
value is computed by resolving it against the effective request URI
([RFC3986], Section 5).
There is even an example with no scheme:
Location: /People.html#tim
------------------------------------------------------------------------
r1770386 | wrowe | 2016-11-18 09:45:32 -0500 (Fri, 18 Nov 2016) | 6 lines
Backport: r1769965
Submitted by: wrowe, rpluem
Actually cause the Host header to be overridden, as noted by rpluem,
and simplify now that there isn't a log-only mode.
------------------------------------------------------------------------
r1770173 | wrowe | 2016-11-17 07:09:32 -0500 (Thu, 17 Nov 2016) | 1 line
Merge of r1765451 did not apply cleanly, drop unneeded prototype.
------------------------------------------------------------------------
r1769675 | wrowe | 2016-11-14 13:57:12 -0500 (Mon, 14 Nov 2016) | 1 line
Add an entry about RFC strictness
------------------------------------------------------------------------
r1769674 | wrowe | 2016-11-14 13:54:42 -0500 (Mon, 14 Nov 2016) | 1 line
Clean up CHANGES for clarity
------------------------------------------------------------------------
r1769672 | wrowe | 2016-11-14 13:15:07 -0500 (Mon, 14 Nov 2016) | 31 lines
Dropped the never-released ap_has_cntrls() as it had very limited
and inefficient application at that, added ap_scan_vchar_obstext()
to accomplish a similar purpose.
Dropped HttpProtocolOptions StrictURL option, this will be better
handled in the future with a specific directive and perhaps multiple
levels of scrutiny, use ap_scan_vchar_obstext() to simply ensure there
are no control characters or whitespace within the URI.
Changed the scanning of the response header table by check_headers()
to follow the same rulesets as reading request headers. Disallow any
CTL character within a response header value, and any CTL or whitespace
in response header field name, even in strict mode.
Apply HttpProtocolOptions Strict to chunk header parsing, invalid
whitespace is invalid, line termination must follow CRLF convention.
Submitted by: wrowe
Backport: r1764961,1765112-1765115
When redrawing the parser, ap_get_http_token looked to be useful, but there's
no application for this yet in httpd, so hold off adding this function when
we backport the enhancements. ap_scan_http_token was entirely sufficient.
If the community wants this new function, we can add it when backporting
work is complete.
This patch, and the earlier patches Friday actually demanded an mmn major
bump due to struct member changes. In any final backport, new members must
be added to the end of the struct to retain an mmn minor designation.
Submitted by: wrowe
Backport: r1765451
------------------------------------------------------------------------
r1769669 | wrowe | 2016-11-14 12:59:10 -0500 (Mon, 14 Nov 2016) | 124 lines
Fix syntax
Submitted by: jailletc36
Backport: r1756862
Introduce StrictURI|UnsafeURI for RFC3986 enforcement
Submitted by: wrowe
Backport: r1756959
Surpress noise about syntax
Submitted by: wrowe
Backport: r1756978
Yann is correct, % is distinct from reserved and unreserved
Submitted by: wrowe
Backport: r1757062
As commented, ensure we don't flag a request as a rejected 0.9 request
if we identified any other parsing errors and handle all 0.9 request
errors as 400 BAD REQUEST, presuming HTTP/1.0 to deliver the error details.
Do not report 0.9 issues as 505 INVALID PROTOCOL because the client apparently
specified no protocol, and 505 post-dates the simple HTTP request mechanism.
Submitted by: wrowe
Backport: r1757065
Rename LenientWhitespace to UnsafeWhitespace and change StrictWhitespace
to the default behavior, after discussion with fielding et al about the
purpose of section 3.5. Update the documentation to clarify this.
This patch removes whitespace considerations from the Strict|Unsafe toggle
and consolidates them all in the StrictWhitespace|UnsafeWhitespace toggle.
Added a bunch of logic comments to read_request_line parsing.
Dropped the badwhitespace list for an all-or-nothing toggle in rrl.
Leading space before the method is optimized to be evaluated only once.
Toggled the request from HTTP/0.9 to HTTP/1.0 for more BAD_REQUEST cases.
Moved s/[\n\v\f\r]/ / cleanup logic earlier in the cycle, to operate on
each individual line read, and catch bad whitespace errors earlier.
This changes the obs-fold to more efficiently condense whitespace and
forces concatinatination with a single SP, always. Overrides are not
necessary since obs-fold is clearly deprecated.
Submitted by: wrowe
Backport: r1757589
Also catch invalid spaces between the URI <> Protocol in StrictWhitespace mode.
(matching the test for the Method <> URI)
Submitted by: wrowe
Backport: r1757593
Correct RFC reference text (link was right)
Submitted by: wrowe
Backport: r1757711
First survey results, all intrinsicly bad input will be logged at the debug
level, no louder. This patch intentionally dodges the Limit* constrained tests
since administrators may shoot themselves in the foot, or be confronted with
impossibly long cookie values, etc.
Adjust the documentation to match.
Submitted by: wrowe
Backport: r1757920
Correct URL failure reporting.
Drop the second reporting of HEAD over HTTP/0.9 requests, we short-circuit
this early now in read_request_line() when presented anything other than
the sole "GET" method permitted by spec.
Revert to the correct APLOGNO ID for this case
Submitted by: wrowe
Backport: r1757921, r1757924
Folding StrictWhitespace into the Strict ruleset of RFC7230, per dev@ poll.
This choice is unanimous, although StrictURI (a different RFC) still hasn't
found absolute concensus.
Submitted by: wrowe
Backport: r1758226
Correct the parser construction for several optimizations,
based on the fact that bad whitespace shall not be permitted
or corrected in any operating mode, while preserving the
ability to extract bad method/uri/proto for later reporting
and diagnostics.
This change causes badwhitespace in the request line or any
request field line to always fail, and not honor the setting
of the HttpProtocolOptions Unsafe option. Mult SP characters
or trailing SP characters in the request line are still
permitted in Unsafe mode.
Adjusted several error message emits to match these changes.
Submitted by: wrowe
Backport: r1758263
Clarify documentation based on concensus decisions discussed on dev@
and reflecting the current implementation, clean up stray <p>
Submitted by: wrowe
Backport: r1758265, r1758266
New optional flag to enforce <CR><LF> line delimiters in ap_[r]getline,
created by overloading 'int fold' (1 or 0) as 'int flags', with the same
value 1 for AP_GETLINE_FOLD (which httpd doesn't use), and a new value
2 for AP_GETLINE_CRLF
Enforce CRLF when HttpProtocolOptions Strict is in force.
Correctly introduces a new t/TEST fail.
Submitted by: wrowe
Backport: r1758304
Calm some overly agressive crlf handling, and clarify
Submitted by: wrowe
Backport: r1758305, r1758313
Review of IE 11, Firefox 48 and Chrome 53 all indicate that ';' URI characters
are transmitted unencoded, per RFC3986 section 3.3 grammer. Correct httpd's
behavior to not encode ';' in proxied URI's or Location: response headers.
Submitted by: wrowe
Backport: r1760444
------------------------------------------------------------------------
r1769664 | wrowe | 2016-11-14 12:07:40 -0500 (Mon, 14 Nov 2016) | 48 lines
Drop unused, previously sscanf() target variables
Submitted by: wrowe
Backport: r1756821
Drop redundant == --rrl_none evaluation
Submitted by: rpluem
Backport: r1756823
server/protocol.c (read_request_line): Fix compiler warnings with GCC.
Submitted by: jorton
Backport: r1756824
Correct request header handling of whitespace with the new possible config of
HttpProtocolOptions Unsafe StrictWhitespace
I have elected not to preserve any significance to excess whitespace in the
now-deprecated obs-fold code path, that's certainly open for discussion.
This can be reviewed by tweaking t/conf/extra.conf to switch Strict to Unsafe.
Submitted by: wrowe
Backport: r1756847
A band-aid to resolve an immediate IBM MVS'ism
Submitted by: wrowe
Backport: r1756849
Resolve Netware (and other arch) build error for non-portable isascii()
Submitted by: wrowe
Backport: r1756934
Generally, the cart comes before the horse, this mirrors apr_lib.h
Submitted by: wrowe
Backport: r1756937
After lengthy investigation with covener's assistance, it seems we cannot
use a static table. We cannot change this to dynamic use of the local iconv
without build changes to avoid such use on cross-platform builds.
I'm satisfied if we trust iscntrl to at least catch all the most lethal
C0 Ctrls (we are promised it catches bad carriage control/line endings)
and leave this in the short term with an XXX to revisit at a future time.
The token stop never needed this table, because we can use the affirmative
list of token characters to define it.
Submitted by: wrowe, covener
Backport: r1756946
------------------------------------------------------------------------
r1769662 | wrowe | 2016-11-14 12:01:20 -0500 (Mon, 14 Nov 2016) | 46 lines
Rename the previously undocumented HTTPProtocol directive
to EnforceHTTPProtocol, and invert the default behavior
to strictly observe RFC 7230 unless otherwise configured.
And Document This.
The relaxation option is renamed 'Unsafe'. 'Strict' is no
longer case sensitive. 'min=0.9|1.0' is now the verbose
'Allow0.9' or 'Require1.0' case-insenstive grammer. The
exclusivity tests have been modified to detect conflicts.
The 'strict,log' option failed to enforce strict conformance,
and has been removed. Unsafe, informational logging is possible
in any loadable module, after the request data is unsafely
accepted.
This triggers a group of failures in t/apache/headers.t as
expected since those patterns violated RFC 7230 section 3.2.4.
Submitted by: wrowe
Backport: r1756540
Correct AP_HTTP_CONFORMANCE_ flags
Submitted by: wrowe
Backport: r1756555
Renaming this directive to HttpProtocolOptions after discussion on dev@
Submitted by: wrowe
Backport: r1756649
Perform correct, strict parsing of the request line, handling the
http protocol tag, url and method appropriately, and attempting
to extract values even in the presence of unusual whitespace in
keeping with section 3.5, prior to responding with whatever
error reply is needed. Conforms to RFC7230 in all respects,
the section 3.5 optional behavior can be disabled by the user
with a new HttpProtocolOptions StrictWhitespace flag. In all
cases, the_request is regenerated from the parsed components
with exactly two space characters.
Shift sf's 'strict' method check from the Strict behavior because
it violates forward proxy logic, adding a new RegisteredMethods
flag, as it will certainly be useful to some.
Submitted by: wrowe
Backport: r1756729
------------------------------------------------------------------------
r1769649 | wrowe | 2016-11-14 10:29:20 -0500 (Mon, 14 Nov 2016) | 124 lines
Improve legibility of reviewing the generated table, using hex rather than dec
Submitted by: wrowe
Backport: r1754536
Correct T_HTTP_TOKEN_STOP per RFC2068 (2.2) - RFC7230 (3.2.6),
which has always defined 'token' as CHAR or VCHAR - visible USASCII only.
NUL char is also a stop, end of parsing.
Submitted by: wrowe
Backport: r1754538
Be more explicit about NUL in case iscntrl is inconsistent
Submitted by: wrowe
Backport: r1754539
Introduce T_HTTP_CTRLS for efficiently finding non-text chars
Submitted by: wrowe
Backport: r1754540
Introduce ap_scan_http_field_content, ap_scan_http_token
and ap_get_http_token [later reverted] for more efficient
string handling.
Submitted by: wrowe
Backport: r1754541
With NUL as a TOKEN_STOP, this code is more efficient
Submitted by: wrowe
Backport: r1754544
We arrive here for more than one cause; offer a more general statement
Submitted by: wrowe
Backport: r1754547
Strictly observe spec on obs-fold
Submitted by: wrowe
Backport: r1754548
Leave an emphatic TODO per Jeff's observations
Submitted by: trawick
Backport: r1754555
Introduce ap_scan_http_token / ap_scan_http_field_content for a much
more efficient pass through the header text; rather than reparsing
the strings over and over under the HTTP_CONFORMANCE_STRICT fules.
Improve logic and legibility by eliminating multiple repetitive tests
of the STRICT flag, and simply reorder 'classic' behavior first and
this new parser second to simplify the diff. Because of the whitespace
change (which I had wished to dodge), reading this --ignore-all-space
is a whole lot easier. Particularly against 2.4.x branch, which is now
identical in the 'classic' logic flow. Both of which I'll share with dev@
Submitted by: wrowe
Backport: r1754556
Friendly catch by Rüdiger, restore line mis-removed by the previous commit
Submitted by: rpluem
Backport: r1754568
Clean up doubled-'{'
Correct usage for ap_scan_http_token (had used _get_ syntax)
Correct logic, detect no 'token' chars, or missing ':'
Submitted by: wrowe, rpluem
Backport: r1754569,r1754570,r1754577
Replacement solution to identify VCHAR/ASCII symbols, even in EBCDIC.
Looking for someone with an EBCDIC environment to post the output of
the test_char.h generated file for verification.
Submitted by: wrowe
Backport: r1754579
Clean up an edge case where obs-fold continuation preceeds the first header,
as with r1755098, but this time ensure the previous header processing logic
ensures there was a previous header as identified by jchampion.
This patch restructures the loop for legibility with a loop continuation,
allowing us to flatten all of this hard-to-follow code. The subsequent
patch will be a whitespace-only change for formatting.
Testing len > 0 is redundant when *field is a "\0" and mismatches here,
folded flag was a no-op, unused once we added continue; logic.
Fix these as initially attempted in r1755114.
Improve comments and reflow whitespace.
Submitted by: wrowe
Backport: r1755123,r1755124,r1755125,r1755126
As promised, reduce this logic by net 9 code lines, shifting the burden
of killing trailing whitespace to the purpose-agnostic read logic.
Whitespace before or after an obs-fold, and before or after a field value
have no semantic purpose at all. Because we are building a buffer for all
folded values, reducing the size of the newly allocated buffer is always
to our advantage.
Submitted by: wrowe
Backport: r1755233
Treat empty obs-fold line as a noop, eliminate all intra-obs-fold excess
whitespace, and observe the 1 SP per obs-folding per spec.
Submitted by: wrowe
Backport: r1755234,r1755235,r1755236
Treat empty obs-fold line as abusive traffic.
Submitted by: wrowe
Backport: r1755263
Stop reflecting irrelevant data to the request error notes, particularly
for abusive and malformed traffic the non-technical consumer of a user-agent
has no control over.
Simply take note where the administrator-configured limits have been exceeded,
that administrator can find details in the error log if desired.
Submitted by: wrowe
Backport: r1755264
Follow up to r1755264.
Don't crash when ap_rgetline() returns a NULL field on ENOSPC.
Submitted by: ylavic
Backport: r1755343
Follow on to r1755264, for the case of merged header length exceptions,
and ensure the field header name is truncated to a sane log width.
Submitted by: wrowe
Backport: r1755744
------------------------------------------------------------------------
r1769454 | wrowe | 2016-11-12 18:47:29 -0500 (Sat, 12 Nov 2016) | 2 lines
Partial Backport of r1746884, no-op changes that introduce patch conflicts.
------------------------------------------------------------------------
r1768978 | wrowe | 2016-11-09 09:39:05 -0500 (Wed, 09 Nov 2016) | 5 lines
Backports: r1687643
Submitted by: covener
be less weird in comment
------------------------------------------------------------------------
r1768977 | wrowe | 2016-11-09 09:37:34 -0500 (Wed, 09 Nov 2016) | 5 lines
Backports: r1687642
Submitted by: covener
elaborate on a misleading comment
------------------------------------------------------------------------
r1768971 | wrowe | 2016-11-09 09:32:09 -0500 (Wed, 09 Nov 2016) | 8 lines
core: Follow up to r1664205 (previously backported)
Don't let invalid r->proto_num/protocol out of read_request_line() reach
the output filters (when responding with 400 Bad Request).
Suggested by: rpluem
Backports: r1664576
------------------------------------------------------------------------
r1768969 | wrowe | 2016-11-09 09:23:00 -0500 (Wed, 09 Nov 2016) | 10 lines
Backport: r1610383
Submitted by: jailletc36
Simplify code.
Cases where 'loc' doesn't have any ':' or is starting with ':' are already
handled by 'ap_is_url()'
Calling 'apr_isascii()' seems useless.
------------------------------------------------------------------------
r1768968 | wrowe | 2016-11-09 09:20:45 -0500 (Wed, 09 Nov 2016) | 4 lines
Backport: r1546860
Submitted by: jailletc36
Fix missing space in message of protocol.c (other r1546860 changes ignored)
------------------------------------------------------------------------
r1768093 | wrowe | 2016-11-04 16:50:45 -0400 (Fri, 04 Nov 2016) | 7 lines
ap_rgetline_core() now pulls from r->proto_input_filters
for better input filtering behavior during chunked trailer
processing by ap_http_filter().
Backports: r1446421
Submitted by: joes
------------------------------------------------------------------------
r1768090 | wrowe | 2016-11-04 16:47:00 -0400 (Fri, 04 Nov 2016) | 7 lines
Stupid CodeWarrior compiler cant take vars with struct inits.
Ensure that is_v6literal is always initialized
Backports: r1428145, r1436457
Submitted by: fuankg, rpluem
------------------------------------------------------------------------
r1768036 | wrowe | 2016-11-04 10:20:16 -0400 (Fri, 04 Nov 2016) | 40 lines
Add an option to enforce stricter HTTP conformance
This is a first stab, the checks will likely have to be revised.
For now, we check
* if the request line contains control characters
* if the request uri has fragment or username/password
* that the request method is standard or registered with RegisterHttpMethod
* that the request protocol is of the form HTTP/[1-9]+.[0-9]+,
or missing for 0.9
* if there is garbage in the request line after the protocol
* if any request header contains control characters
* if any request header has an empty name
* for the host name in the URL or Host header:
- if an IPv4 dotted decimal address: Reject octal or hex values, require
exactly four parts
- if a DNS host name: Reject non-alphanumeric characters besides '.' and
'-'. As a side effect, this rejects multiple Host headers.
* if any response header contains control characters
* if any response header has an empty name
* that the Location response header (if present) has a valid scheme and is
absolute
If we have a host name both from the URL and the Host header, we replace the
Host header with the value from the URL to enforce RFC conformance.
There is a log-only mode, but the loglevels of the logged messages need some
thought/work. Currently, the checks for incoming data log for 'core' and the
checks for outgoing data log for 'http'. Maybe we need a way to configure the
loglevels separately from the core/http loglevels.
change protocol number parsing in strict mode according to HTTPbis draft
- only accept single digit version components
- don't accept white-space after protocol specification
Clean up comment, fix log tags.
Submitted by: sf
Backports: r1426877, r1426879, r1426988, r1426992
------------------------------------------------------------------------
r1768035 | wrowe | 2016-11-04 10:14:59 -0400 (Fri, 04 Nov 2016) | 14 lines
Correctly parse an IPv6 literal host specification in an absolute URL
in the request line.
- Fix handling of brackets [ ] surrounding the IPv6 address.
- Skip parsing r->hostname again if not necessary.
- Do some checks that the IPv6 address is sane. This is not done by
apr_parse_addr_port().
log client error at level debug, log broken Host header value
Backports: r1407006, r1426827
Submitted by: sf
------------------------------------------------------------------------
r1767942 | wrowe | 2016-11-03 14:01:23 -0400 (Thu, 03 Nov 2016) | 5 lines
Expose ap_method_register() to the admin with a new RegisterHttpMethod
directive.
Backports: r1407599
Submitted by: sf
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r1767941 | wrowe | 2016-11-03 13:57:50 -0400 (Thu, 03 Nov 2016) | 9 lines
New directive HttpProtocol which allows to disable HTTP/0.9 support
with min=0.9|1.0 syntax.
A tighter restriction off the version in the request line is still
possible with <If "%{SERVER_PROTOCOL_NUM} ..."> .
Submitted by: sf
Backports: r1406719, r1407643, r1425366
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r1767912 | wrowe | 2016-11-03 11:55:18 -0400 (Thu, 03 Nov 2016) | 1 line
Branch to bring http protocol parsing in 2.4.x in sync with trunk
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git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1772678 13f79535-47bb-0310-9956-ffa450edef68
adding ap_get_protocol(c) which safeguards against NULL returns, for use instead of direct calling ap_run_protocol_get
changed Protocols to let vhosts override servers, removed old H2Engine example from readme
creating ap_array_index in util, forwarding scheme into request processing, enabling SSL vars only when scheme is not http:, delayed connection creation until task worker assignment
removed unnecessary lingering_close and sbh update on end of protocol upgrade handling
introducing ap_array_index in util, used in protocol and mod_h2
fixes existing protocol missing in selection if not explicitly proposed
new directive ProtocolsHonorOrder, added documentation for Protocols feature, changed preference selection and config merging
removed accidental code
new Protocols directive and core API changes to enable protocol switching on HTTP Upgrade or ALPN, implemented in mod_ssl and mod_h2
SECURITY (CVE-2014-0117): Fix a crash in mod_proxy. In a reverse
proxy configuration, a remote attacker could send a carefully crafted
request which could crash a server process, resulting in denial of
service.
Thanks to Marek Kroemeke working with HP's Zero Day Initiative for
reporting this issue.
* server/util.c (ap_parse_token_list_strict): New function.
* modules/proxy/proxy_util.c (find_conn_headers): Use it here.
* modules/proxy/mod_proxy_http.c (ap_proxy_http_process_response):
Send a 400 for a malformed Connection header.
Submitted by: Edward Lu, breser, covener
http, mod_ssl: Introduce and return the 421 (Misdirected Request) status code
for clients requesting a hostname on a reused connection whose SNI (from the
TLS handshake) does not match.
PR 5802.
This allows HTTP/2 clients to fall back to a new connection as per:
https://tools.ietf.org/html/rfc7540#section-9.1.2
Proposed by: Stefan Eissing <stefan eissing.org>
Reviewed by: ylavic
c89
Allowing protocol_propose hooks to be called with offers=NULL, clarifying semantics as proposed by chaosed0@gmail.com
giving ap_array_index a start parameter, adding ap_array_contains
ap_process_request needs exportation for use in mod_h2 on Windows
final final change to the new ap_array_str_* functions after review
changed Protocols default to http/1.1 only, updated documentation, changed ap_select_protocol() to return NULL when no protocol could be agreed upon
mod_ssl: fix compiler warning (bad cast).
improvements in ap_select_protocol(), supplied by yann ylavic
Submitted by: icing, jorton, ylavic, covener, icing, icing, gsmith, icing, icing, ylavic, icing
Reviewed/backported by: jim
git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1705672 13f79535-47bb-0310-9956-ffa450edef68
excluded from this cleanup as they must be signature identical to the
clib functions, and although the definition of size_t has been flakey,
the definition of those functions appears to be generally clean since
ANSI C.
Backports: r1228323
git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1228324 13f79535-47bb-0310-9956-ffa450edef68
and this allows the compiler to optimize the strlen() call away.
Submitted by: Christophe Jaillet <christophe jaillet wanadoo fr>
git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1131465 13f79535-47bb-0310-9956-ffa450edef68
from core. We now exclude Content-Type from responses for which
a media type has not been configured via mime.types, AddType,
ForceType, or some other mechanism. MMN major bump to NZ time.
PR: 13986
git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@739382 13f79535-47bb-0310-9956-ffa450edef68
ap_parse_request_body function out of the http module and into a
new module called mod_request, reducing the size of the core.
git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@647263 13f79535-47bb-0310-9956-ffa450edef68
This define serves no modern purpose, since every module in the wild, including
our own define it, for no purpose.
If you have functions which you do not want in the 'public' API, put them
in a private header, that is not installed, just like mod_ssl does.
git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@645412 13f79535-47bb-0310-9956-ffa450edef68
We'll need this option to fix PR#43711, and ap_send_interim_response
is fortunately too new an API to have made it into anything stable.
git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@588806 13f79535-47bb-0310-9956-ffa450edef68
Bumped mmn, and ap module cookie, for this function rename.
It's not a deprecation, as ap_http_method would be a lovely function
name sometime in the future: to determine what the function name implies.
git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@123882 13f79535-47bb-0310-9956-ffa450edef68
bottom (APR/system) up -- we can't give the client a 64bit API and
then cast it to 32bits internally without introducing security holes
on other platforms.
git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@105572 13f79535-47bb-0310-9956-ffa450edef68
