GLSA 200707-06: XnView: Stack-based buffer overflow

http://security.gentoo.org/

Severity:	normal
Title:	XnView: Stack-based buffer overflow
Date:	07/11/2007
Bugs:	#175670
ID:	200707-06

Synopsis

XnView is vulnerable to a stack-based buffer overflow and possible remote code execution when handling XPM image files.

Background

XnView is software to view and convert graphics files. XPixMap (XPM) is a simple ascii-based graphics format.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
x11-misc/xnview	< 1.70		x86

Description

XnView is vulnerable to a stack-based buffer overflow while processing an XPM file with an overly long section string (greater than 1024 bytes).

Impact

An attacker could entice a user to view a specially crafted XPM file with XnView that could trigger the vulnerability and possibly execute arbitrary code with the rights of the user running XnView.

Workaround

There is no known workaround at this time.

Resolution

No update appears to be forthcoming from the XnView developer and XnView is proprietary, so the XnView package has been masked in Portage. We recommend that users select an alternate graphics viewer and conversion utility, and unmerge XnView:

    # emerge --unmerge xnview

References

CVE-2007-2194

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200707-06.xml

Concerns?

Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.