mirror of
https://github.com/sqlite/sqlite.git
synced 2025-07-29 08:01:23 +03:00
The ability to load extensions is turned off by default. It must be
enabled by calling sqlite3_enable_load_extension() before it will work. This prevents security problems in legacy applications. Ticket #1863. (CVS 3311) FossilOrigin-Name: 4692319ccf28b0ebe64d5c5d189f444034fe0cb2
This commit is contained in:
drh
22
manifest
22
manifest
@ -1,5 +1,5 @@
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C Changes\sto\sbuild\ssuccessfully\swith\s-DSQLITE_OMIT_LOAD_EXTENSION=1\s(CVS\s3310)
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D 2006-06-27T14:37:20
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C The\sability\sto\sload\sextensions\sis\sturned\soff\sby\sdefault.\s\sIt\smust\sbe\nenabled\sby\scalling\ssqlite3_enable_load_extension()\sbefore\sit\swill\swork.\nThis\sprevents\ssecurity\sproblems\sin\slegacy\sapplications.\s\sTicket\s#1863.\s(CVS\s3311)
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D 2006-06-27T15:16:15
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F Makefile.in f839b470345d3cb4b0644068474623fe2464b5d3
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F Makefile.linux-gcc 2d8574d1ba75f129aba2019f0b959db380a90935
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F README 9c4e2d6706bdcc3efdd773ce752a8cdab4f90028
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@ -48,7 +48,7 @@ F src/hash.c 449f3d6620193aa557f5d86cbc5cc6b87702b185
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F src/hash.h 1b3f7e2609141fd571f62199fc38687d262e9564
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F src/insert.c 63f01d3f4e0ba7ed171934a24aece2191824faec
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F src/legacy.c 10e01a902d7f2c872c7922fedf19a2df70935857
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F src/loadext.c e4a39d0c8443827b517024a3369584024ba23e17
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F src/loadext.c 040853b36adf535bba6a2e9f5d921422a4394baf
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F src/main.c 2f78bd86852fdd42e3e9e0e4dba54000d9dc516d
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F src/md5.c c5fdfa5c2593eaee2e32a5ce6c6927c986eaf217
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F src/os.c 59f05de8c5777c34876607114a2fbe55ae578235
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@ -71,13 +71,13 @@ F src/printf.c b179b6ed12f793e028dd169e2e2e2b2a37eedc63
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F src/random.c d40f8d356cecbd351ccfab6eaedd7ec1b54f5261
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F src/select.c 380fa06c99ae01050c0054c4b1db91e9f1d8322d
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F src/server.c 087b92a39d883e3fa113cae259d64e4c7438bc96
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F src/shell.c ad73192b30a338a58fe81183d4a5d5a1d4e51d36
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F src/sqlite.h.in af0ec0cfb2f8211e42cabf2523d1c8783f35ccaf
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F src/shell.c 48d8e65784c2fcb8c906d464f3c441640ff21c9d
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F src/sqlite.h.in a1ae5f372affd1313d9bea98155f01626f538fbd
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F src/sqlite3ext.h c611255287e9a11ce4f1fe6251c2a0b9d32a828b
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F src/sqliteInt.h 3e3f9efa7f043f3b677a35652120092c5902dd3d
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F src/sqliteInt.h e07a49b3e349c2c5f1bcb7dd9371fc3faf5ba338
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F src/table.c e707e822aad688034d391b93df63d6b2d302fdca
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F src/tclsqlite.c 32d9e0147077f2e2c127c5f214fb3fe03ef97d18
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F src/test1.c d398aa0c2227b76696a249f0fb9a506e6e391928
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F src/test1.c 4127f457e4d9bf086c58b32297c098963defddf6
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F src/test2.c ca74a1d8aeb7d9606e8f6b762c5daf85c1a3f92b
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F src/test3.c 833dc8346e431182ae6bd0648455c3d4cc65a19f
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F src/test4.c 8b784cd82de158a2317cb4ac4bc86f91ad315e25
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@ -196,7 +196,7 @@ F test/lastinsert.test 474d519c68cb79d07ecae56a763aa7f322c72f51
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F test/laststmtchanges.test 19a6d0c11f7a31dc45465b495f7b845a62cbec17
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F test/like.test 5f7d76574752a9101cac13372c8a85999d0d91e6
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F test/limit.test 2a87b9cb2165abb49ca0ddcf5cb43cf24074581f
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F test/loadext.test 6a047b9bb784a92643c371643bf8acf29a0beb6e
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F test/loadext.test 146ead2c34b76fe4d51a5054b7e52b76f35fba90
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F test/lock.test 9b7afcb24f53d24da502abb33daaad2cd6d44107
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F test/lock2.test d83ba79d3c4fffdb5b926c7d8ca7a36c34288a55
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F test/lock3.test 615111293cf32aa2ed16d01c6611737651c96fb9
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@ -374,7 +374,7 @@ F www/tclsqlite.tcl bb0d1357328a42b1993d78573e587c6dcbc964b9
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F www/vdbe.tcl 87a31ace769f20d3627a64fa1fade7fed47b90d0
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F www/version3.tcl 890248cf7b70e60c383b0e84d77d5132b3ead42b
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F www/whentouse.tcl 97e2b5cd296f7d8057e11f44427dea8a4c2db513
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P 5612b287059c75488f995625d447c4e9521d1637
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R 3722049afc5fc0079c432abf2589144f
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P 783369e870df9d189fc75c98fa574fe4fc9843d0
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R 03b010c340d22a562ee989d0414f81c5
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U drh
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Z 5ed9e00c9b5d8d18b3e6766a2179c4cd
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Z b75df8d7be6621720643222d3b606d63
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@ -1 +1 @@
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783369e870df9d189fc75c98fa574fe4fc9843d0
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4692319ccf28b0ebe64d5c5d189f444034fe0cb2
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@ -261,6 +261,19 @@ int sqlite3_load_extension(
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char *zErrmsg = 0;
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SQLITE_LIBRARY_TYPE *aHandle;
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/* Ticket #1863. To avoid a creating security problems for older
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** applications that relink against newer versions of SQLite, the
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** ability to run load_extension is turned off by default. One
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** must call sqlite3_enable_load_extension() to turn on extension
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** loading. Otherwise you get the following error.
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*/
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if( (db->flags & SQLITE_LoadExtension)==0 ){
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if( pzErrMsg ){
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*pzErrMsg = sqlite3_mprintf("not authorized");
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}
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return SQLITE_ERROR;
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}
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if( zProc==0 ){
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zProc = "sqlite3_extension_init";
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}
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@ -326,4 +339,17 @@ void sqlite3CloseExtensions(sqlite3 *db){
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#endif
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}
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/*
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** Enable or disable extension loading. Extension loading is disabled by
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** default so as not to open security holes in older applications.
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*/
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int sqlite3_enable_load_extension(sqlite3 *db, int onoff){
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if( onoff ){
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db->flags |= SQLITE_LoadExtension;
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}else{
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db->flags &= ~SQLITE_LoadExtension;
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}
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return SQLITE_OK;
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}
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#endif /* SQLITE_OMIT_LOAD_EXTENSION */
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@ -12,7 +12,7 @@
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** This file contains code to implement the "sqlite" command line
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** utility for accessing SQLite databases.
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**
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** $Id: shell.c,v 1.142 2006/06/13 15:12:21 drh Exp $
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** $Id: shell.c,v 1.143 2006/06/27 15:16:15 drh Exp $
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*/
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#include <stdlib.h>
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#include <string.h>
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@ -807,6 +807,9 @@ static void open_db(struct callback_data *p){
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p->zDbFilename, sqlite3_errmsg(db));
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exit(1);
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}
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#ifndef SQLITE_OMIT_LOAD_EXTENSION
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sqlite3_enable_load_extension(p->db, 1);
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#endif
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}
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}
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@ -12,7 +12,7 @@
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** This header file defines the interface that the SQLite library
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** presents to client programs.
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**
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** @(#) $Id: sqlite.h.in,v 1.184 2006/06/26 21:35:45 drh Exp $
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** @(#) $Id: sqlite.h.in,v 1.185 2006/06/27 15:16:15 drh Exp $
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*/
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#ifndef _SQLITE3_H_
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#define _SQLITE3_H_
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@ -1485,7 +1485,7 @@ int sqlite3_table_column_metadata(
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**
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** Attempt to load an SQLite extension library contained in the file
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** zFile. The entry point is zProc. zProc may be 0 in which case the
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** name of the entry point is derived from the filename.
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** name of the entry point defaults to "sqlite3_extension_init".
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**
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** Return SQLITE_OK on success and SQLITE_ERROR if something goes wrong.
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**
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@ -1493,23 +1493,8 @@ int sqlite3_table_column_metadata(
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** error message text. The calling function should free this memory
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** by calling sqlite3_free().
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**
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** The entry point name is derived from the filename according to the
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** following steps:
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**
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** * Convert the name to lower case
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** * Remove the path prefix from the name
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** * Remove the first "." and all following characters from the name
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** * If the name begins with "lib" remove the first 3 characters
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** * Remove all characters that are not US-ASCII alphanumerics
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** or underscores
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** * Remove any leading digits and underscores from the name
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** * Append "_init" to the name
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**
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** So, for example, if the input filename is "/home/drh/libtest1.52.so"
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** then the entry point would be computed as "test1_init".
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**
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** The derived entry point name is limited to a reasonable number of
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** characters (currently 200).
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** Extension loading must be enabled using sqlite3_enable_load_extension()
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** prior to calling this API or an error will be returned.
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**
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****** EXPERIMENTAL - subject to change without notice **************
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*/
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@ -1520,6 +1505,18 @@ int sqlite3_load_extension(
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char **pzErrMsg /* Put error message here if not 0 */
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);
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/*
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** So as not to open security holes in older applications that are
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** unprepared to deal with extension load, and as a means of disabling
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** extension loading while executing user-entered SQL, the following
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** API is provided to turn the extension loading mechanism on and
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** off. It is off by default. See ticket #1863.
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**
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** Call this routine with onoff==1 to turn extension loading on
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** and call it with onoff==0 to turn it back off again.
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*/
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int sqlite3_enable_load_extension(sqlite3 *db, int onoff);
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/*
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****** EXPERIMENTAL - subject to change without notice **************
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**
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@ -11,7 +11,7 @@
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*************************************************************************
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** Internal interface definitions for SQLite.
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**
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** @(#) $Id: sqliteInt.h,v 1.516 2006/06/27 14:37:20 drh Exp $
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** @(#) $Id: sqliteInt.h,v 1.517 2006/06/27 15:16:15 drh Exp $
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*/
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#ifndef _SQLITEINT_H_
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#define _SQLITEINT_H_
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@ -539,6 +539,7 @@ struct sqlite3 {
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#define SQLITE_ReadUncommitted 0x00004000 /* For shared-cache mode */
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#define SQLITE_LegacyFileFmt 0x00008000 /* Create new databases in format 1 */
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#define SQLITE_FullFSync 0x00010000 /* Use full fsync on the backend */
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#define SQLITE_LoadExtension 0x00020000 /* Enable load_extension */
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/*
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** Possible values for the sqlite.magic field.
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56
src/test1.c
56
src/test1.c
@ -13,7 +13,7 @@
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** is not included in the SQLite library. It is used for automated
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** testing of the SQLite library.
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**
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** $Id: test1.c,v 1.214 2006/06/27 12:51:13 drh Exp $
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** $Id: test1.c,v 1.215 2006/06/27 15:16:16 drh Exp $
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*/
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#include "sqliteInt.h"
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#include "tcl.h"
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@ -1094,6 +1094,7 @@ static int test_table_column_metadata(
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}
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#endif
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/*
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** Usage: sqlite3_load_extension DB-HANDLE FILE ?PROC?
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*/
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@ -1133,7 +1134,12 @@ static int test_load_extension(
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** TCL_ERROR and load any error string into the interpreter. If no
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** error occurs, set rc to TCL_OK.
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*/
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#ifdef SQLITE_OMIT_LOAD_EXTENSION
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rc = SQLITE_ERROR;
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zErr = sqlite3_mprintf("this build omits sqlite3_load_extension()");
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#else
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rc = sqlite3_load_extension(db, zFile, zProc, &zErr);
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#endif
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if( rc!=SQLITE_OK ){
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Tcl_SetResult(interp, zErr ? zErr : "", TCL_VOLATILE);
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rc = TCL_ERROR;
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@ -1145,6 +1151,48 @@ static int test_load_extension(
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return rc;
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}
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/*
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** Usage: sqlite3_enable_load_extension DB-HANDLE ONOFF
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*/
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static int test_enable_load(
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ClientData clientData, /* Not used */
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Tcl_Interp *interp, /* The TCL interpreter that invoked this command */
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int objc, /* Number of arguments */
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Tcl_Obj *CONST objv[] /* Command arguments */
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){
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Tcl_CmdInfo cmdInfo;
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sqlite3 *db;
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char *zDb;
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int onoff;
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if( objc!=3 ){
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Tcl_WrongNumArgs(interp, 1, objv, "DB-HANDLE ONOFF");
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return TCL_ERROR;
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}
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zDb = Tcl_GetString(objv[1]);
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/* Extract the C database handle from the Tcl command name */
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if( !Tcl_GetCommandInfo(interp, zDb, &cmdInfo) ){
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Tcl_AppendResult(interp, "command not found: ", zDb, (char*)0);
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return TCL_ERROR;
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}
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db = ((struct SqliteDb*)cmdInfo.objClientData)->db;
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assert(db);
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/* Get the onoff parameter */
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if( Tcl_GetBooleanFromObj(interp, objv[2], &onoff) ){
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return TCL_ERROR;
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}
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#ifdef SQLITE_OMIT_LOAD_EXTENSION
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Tcl_AppendResult(interp, "this build omits sqlite3_load_extension()");
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return TCL_ERROR;
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#else
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sqlite3_enable_load_extension(db, onoff);
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return TCL_OK;
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#endif
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}
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/*
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** Usage: sqlite_abort
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**
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@ -3692,6 +3740,9 @@ int Sqlitetest1_Init(Tcl_Interp *interp){
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{ "sqlite3_tsd_release", test_tsd_release, 0},
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{ "sqlite3_thread_cleanup", test_thread_cleanup, 0},
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{ "sqlite3_load_extension", test_load_extension, 0},
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{ "sqlite3_enable_load_extension", test_enable_load, 0},
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/* sqlite3_column_*() API */
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{ "sqlite3_column_count", test_column_count ,0 },
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{ "sqlite3_data_count", test_data_count ,0 },
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@ -3751,9 +3802,6 @@ int Sqlitetest1_Init(Tcl_Interp *interp){
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{ "sqlite3_libversion_number", test_libversion_number, 0 },
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#ifdef SQLITE_ENABLE_COLUMN_METADATA
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{ "sqlite3_table_column_metadata", test_table_column_metadata, 0 },
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#endif
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#ifndef SQLITE_OMIT_LOAD_EXTENSION
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{ "sqlite3_load_extension", test_load_extension, 0 },
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#endif
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};
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static int bitmask_size = sizeof(Bitmask)*8;
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@ -11,7 +11,7 @@
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# This file implements regression tests for SQLite library. The
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# focus of this script is in-memory database backend.
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#
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# $Id: loadext.test,v 1.4 2006/06/26 21:35:46 drh Exp $
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# $Id: loadext.test,v 1.5 2006/06/27 15:16:16 drh Exp $
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set testdir [file dirname $argv0]
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source $testdir/tester.tcl
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@ -50,6 +50,7 @@ do_test loadext-1.1 {
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}
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} {1 {no such function: half}}
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do_test loadext-1.2 {
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sqlite3_enable_load_extension db 1
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sqlite3_load_extension db $testextension testloadext_init
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catchsql {
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SELECT half(1.0);
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@ -60,6 +61,7 @@ do_test loadext-1.2 {
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#
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do_test loadext-1.3 {
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sqlite3 db2 test.db
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sqlite3_enable_load_extension db2 1
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catchsql {
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SELECT half(1.0);
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} db2
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@ -83,6 +85,7 @@ do_test loadext-1.5 {
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db2 close
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sqlite3 db test.db
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sqlite3_enable_load_extension db 1
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# Try to load an extension for which the file does not exist.
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#
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@ -136,6 +139,7 @@ do_test loadext-2.4 {
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db close
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sqlite3 db test.db
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sqlite3_enable_load_extension db 1
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do_test loadext-3.1 {
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catchsql {
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SELECT half(5);
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@ -158,4 +162,31 @@ do_test loadext-3.4 {
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}
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} {0 2.5}
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# Ticket #1863
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# Make sure the extension loading mechanism will not work unless it
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# is explicitly enabled.
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#
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db close
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sqlite3 db test.db
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do_test loadext-4.1 {
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catchsql {
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SELECT load_extension($::testextension,'testloadext_init')
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}
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} {1 {not authorized}}
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do_test loadext-4.2 {
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sqlite3_enable_load_extension db 1
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catchsql {
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SELECT load_extension($::testextension,'testloadext_init')
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}
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} {0 {{}}}
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do_test loadext-4.3 {
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sqlite3_enable_load_extension db 0
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catchsql {
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SELECT load_extension($::testextension,'testloadext_init')
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}
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} {1 {not authorized}}
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finish_test
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Reference in New Issue
Block a user