GLSA 200612-10: Tar: Directory traversal vulnerability

http://security.gentoo.org/

Severity:	normal
Title:	Tar: Directory traversal vulnerability
Date:	12/11/2006
Bugs:	#155901
ID:	200612-10

Synopsis

Tar is vulnerable to directory traversal possibly allowing for the overwriting of arbitrary files.

Background

The Tar program provides the ability to create and manipulate tar archives.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
app-arch/tar	< 1.16-r2	>= 1.16-r2	All supported architectures

Description

Tar does not properly extract archive elements using the GNUTYPE_NAMES record name, allowing files to be created at arbitrary locations using symlinks. Once a symlink is extracted, files after the symlink in the archive will be extracted to the destination of the symlink.

Impact

An attacker could entice a user to extract a specially crafted tar archive, possibly allowing for the overwriting of arbitrary files on the system extracting the archive.

Workaround

There is no known workaround at this time.

Resolution

All Tar users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=app-arch/tar-1.16-r2"

References

CVE-2006-6097

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200612-10.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.