GLSA 200506-16: cpio: Directory traversal vulnerability

http://security.gentoo.org/

Severity:	normal
Title:	cpio: Directory traversal vulnerability
Date:	06/20/2005
Bugs:	#90619
ID:	200506-16

Synopsis

cpio contains a flaw which may allow a specially crafted cpio archive to extract files to an arbitrary directory.

Background

cpio is a file archival tool which can also read and write tar files.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
app-arch/cpio	< 2.6-r3	>= 2.6-r3	All supported architectures

Description

A vulnerability has been found in cpio that can potentially allow a cpio archive to extract its files to an arbitrary directory of the creator's choice.

Impact

An attacker could create a malicious cpio archive which would create files in arbitrary locations on the victim's system. This issue could also be used in conjunction with a previous race condition vulnerability (CAN-2005-1111) to change permissions on files owned by the victim.

Workaround

There is no known workaround at this time.

Resolution

All cpio users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=app-arch/cpio-2.6-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-200506-16.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.