Florian Weimer 676599b36a Harden putpwent, putgrent, putspent, putspent against injection [BZ #18724] ...

This prevents injection of ':' and '\n' into output functions which
use the NSS files database syntax.  Critical fields (user/group names
and file system paths) are checked strictly.  For backwards
compatibility, the GECOS field is rewritten instead.

The getent program is adjusted to use the put*ent functions in libc,
instead of local copies.  This changes the behavior of getent if user
names start with '-' or '+'.

2015-10-02 11:34:13 +02:00

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