TITLE:
GTK+ GdkPixbuf XPM Image Rendering Library Multiple Vulnerabilities

SECUNIA ADVISORY ID:
SA17522

VERIFY ADVISORY:
http://secunia.com/advisories/17522/

CRITICAL:
Moderately critical

IMPACT:
DoS, System access

WHERE:
>From remote

SOFTWARE:
GdkPixbuf 0.x
http://secunia.com/product/3168/
GTK+ 2.x
http://secunia.com/product/3909/

DESCRIPTION:
Some vulnerabilities have been reported in GTK+, which can be
exploited by malicious people to cause a DoS (Denial of Service) and
potentially to compromise a user's system.

1) An integer overflow error in "/gtk+/gdk-pixbuf/io-xpm.c" when
processing XPM files can be exploited to cause a heap-based buffer
overflow. This may be exploited to execute arbitrary code when a
specially crafted XPM file is opened in an application that is linked
with the library.

This may be related to vulnerability #2 in:
SA12542

2) An error in "/gtk+/gdk-pixbuf/io-xpm.c" can cause an infinite loop
when processing a XPM file with a large number of colours. This can be
exploited to cause an application linked with the library to stop
responding when a malicious XPM file is opened.

3) An integer overflow error exists in "/gtk+/gdk-pixbuf/io-xpm.c"
when performing calculations using the height, width and colours of a
XPM file. This may be exploited to execute arbitrary code or to crash
an application that is linked with the library when a malicious XPM
file is opened.

SOLUTION:
Restrict use to trusted XPM files only.

PROVIDED AND/OR DISCOVERED BY:
1) iDEFENSE.
2-3) Ludwig Nussel.

ORIGINAL ADVISORY:
Red Hat Bugzilla:
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=171073
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=171904
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=171900

OTHER REFERENCES:
SA12542:
http://secunia.com/advisories/12542/

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