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[ GLSA 200708-03 ] libarchive (formerly named as bsdtar): Multiple PaX Extension Header Vulne rabili
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PostPosted: Thu Aug 09, 2007 1:26 am    Post subject: [ GLSA 200708-03 ] libarchive (formerly named as bsdtar): Mu Reply with quote

Gentoo Linux Security Advisory

Title: libarchive (formerly named as bsdtar): Multiple PaX Extension Header Vulnerabilities (GLSA 200708-03)
Severity: normal
Exploitable: remote
Date: August 08, 2007
Bug(s): #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: app-arch/libarchive
Vulnerable: < 2.2.4
Unaffected: >= 2.2.4
Architectures: 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:
Code:
# emerge --sync
# emerge --ask --oneshot --verbose ">=app-arch/libarchive-2.2.4"


References

CVE-2007-3641
CVE-2007-3644
CVE-2007-3645
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