GLSA 200502-32: UnAce: Buffer overflow and directory traversal vulnerabilities

http://security.gentoo.org/

Severity:	normal
Title:	UnAce: Buffer overflow and directory traversal vulnerabilities
Date:	02/28/2005
Bugs:	#81958
ID:	200502-32

Synopsis

UnAce is vulnerable to several buffer overflow and directory traversal attacks.

Background

UnAce is an utility to extract, view and test the contents of an ACE archive.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
app-arch/unace	<= 2.5-r3	>= 2.5-r3	All supported architectures

Description

Ulf Harnhammar discovered that UnAce suffers from buffer overflows when testing, unpacking or listing specially crafted ACE archives (CAN-2005-0160). He also found out that UnAce is vulnerable to directory traversal attacks, if an archive contains “./..” sequences or absolute filenames (CAN-2005-0161).

Impact

An attacker could exploit the buffer overflows to execute malicious code or the directory traversals to overwrite arbitrary files.

Workaround

There is no known workaround at this time.

Resolution

All UnAce users should upgrade to the latest available version:

      # emerge --sync
      # emerge --ask --oneshot --verbose ">=app-arch/unace-2.5-r3"

References

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200502-32.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.