TITLE:
CHM Lib Buffer Overflow Vulnerability

SECUNIA ADVISORY ID:
SA17325

VERIFY ADVISORY:
http://secunia.com/advisories/17325/

CRITICAL:
Moderately critical

IMPACT:
System access

WHERE:
>From remote

SOFTWARE:
CHM Lib (chmlib) 0.x
http://secunia.com/product/5996/

DESCRIPTION:
Sven Tantau has reported a vulnerability in CHM Lib (chmlib), which
potentially can be exploited by malicious people to compromise a
user's system.

The vulnerability is caused due to a boundary error in the
"_chm_decompress_block()" function when reading input into a buffer.
This can be exploited to cause a stack-based buffer overflow and may
allow arbitrary code execution via a specially crafted ".chm" file.

The vulnerability has been reported in version 0.36 and prior.

Note: The vulnerability potentially affects other applications that
use the library.

SOLUTION:
Update to version 0.37.
http://morte.jedrea.com/~jedwin/projects/chmlib/

PROVIDED AND/OR DISCOVERED BY:
Sven Tantau

ORIGINAL ADVISORY:
http://www.sven-tantau.de/public_files/chmlib/chmlib_20051126.txt

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