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TITLE:
GNU Enscript "setfilename" Special Escape Buffer Overflow

SECUNIA ADVISORY ID:
SA32137

VERIFY ADVISORY:
http://secunia.com/advisories/32137/

CRITICAL:
Moderately critical

IMPACT:
System access

WHERE:
>From remote

SOFTWARE:
GNU Enscript 1.x
http://secunia.com/advisories/product/4552/

DESCRIPTION:
Secunia Research has discovered a vulnerability in GNU Enscript,
which can be exploited by malicious people to compromise a vulnerable
system.

The vulnerability is caused due to a boundary error within the
"read_special_escape()" function in src/psgen.c. This can be
exploited to cause a stack-based buffer overflow by tricking the user
into converting a malicious file.

Successful exploitation allows execution of arbitrary code, but
requires that special escapes processing is enabled with the "-e"
option.

The vulnerability is confirmed in versions 1.6.1 and 1.6.4 (beta).
Other versions may also be affected.

SOLUTION:
Do not convert untrusted files.

Various Linux vendors will issue patched versions soon.

PROVIDED AND/OR DISCOVERED BY:
Ulf Harnhammar, Secunia Research.

ORIGINAL ADVISORY:
Secunia Research:
http://secunia.com/secunia_research/2008-41/

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