GLSA-200511-23 : chmlib, KchmViewer: Stack-based buffer overflow

This script is Copyright (C) 2005-2014 Tenable Network Security, Inc.


Synopsis :

The remote Gentoo host is missing one or more security-related
patches.

Description :

The remote host is affected by the vulnerability described in GLSA-200511-23
(chmlib, KchmViewer: Stack-based buffer overflow)

Sven Tantau reported about a buffer overflow vulnerability in
chmlib. The function '_chm_decompress_block()' does not properly
perform boundary checking, resulting in a stack-based buffer overflow.

Impact :

By convincing a user to open a specially crafted ITSS or CHM file,
using KchmViewer or a program makes use of chmlib, a remote attacker
could execute arbitrary code with the privileges of the user running
the software.

Workaround :

There is no known workaround at this time.

See also :

http://www.gentoo.org/security/en/glsa/glsa-200511-23.xml

Solution :

All chmlib users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose '>=dev-libs/chmlib-0.37.4'
All KchmViewer users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose '>=app-text/kchmviewer-1.1'

Risk factor :

Medium / CVSS Base Score : 5.1
(CVSS2#AV:N/AC:H/Au:N/C:P/I:P/A:P)

Family: Gentoo Local Security Checks

Nessus Plugin ID: 20267 (gentoo_GLSA-200511-23.nasl)

Bugtraq ID:

CVE ID: CVE-2005-3318