GLSA 200708-03: libarchive (formerly named as bsdtar): Multiple PaX Extension Header Vulnerabilities

http://security.gentoo.org/

Severity:	normal
Title:	libarchive (formerly named as bsdtar): Multiple PaX Extension Header Vulnerabilities
Date:	08/08/2007
Bugs:	#184984
ID:	200708-03

Synopsis

Multiple vulnerabilities were found in libarchive (formerly named as app-archive/bsdtar), possibly allowing for the execution of arbitrary code or a Denial of Service.

Background

libarchive is a library for manipulating different streaming archive formats, including certain tar variants, several cpio formats, and both BSD and GNU ar variants.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
app-arch/libarchive	< 2.2.4	>= 2.2.4	All supported architectures

Description

CPNI, CERT-FI, Tim Kientzle, and Colin Percival reported a buffer overflow (CVE-2007-3641), an infinite loop (CVE-2007-3644), and a NULL pointer dereference (CVE-2007-3645) within the processing of archives having corrupted PaX extension headers.

Impact

An attacker can trick a user or automated system to process an archive with malformed PaX extension headers into execute arbitrary code, crash an application using the library, or cause a high CPU load.

Workaround

There is no known workaround at this time.

Resolution

All libarchive or bsdtar users should upgrade to the latest libarchive version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=app-arch/libarchive-2.2.4"

References

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200708-03.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.