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

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  Severity: Normal

     Title: libarchive (formerly named as bsdtar): Multiple pax
            Extension Header Vulnerabilities
      Date: August 08, 2007
      Bugs: #184984
        ID: 200708-03

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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
    -------------------------------------------------------------------
  1  app-arch/libarchive       < 2.2.4                        >= 2.2.4

Description

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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"

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References

  [ 1 ] CVE-2007-3641
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-3641   [ 2 ] CVE-2007-3644
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-3644   [ 3 ] CVE-2007-3645
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-3645

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 http://bugs.gentoo.org.

License

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Copyright 2007 Gentoo Foundation, Inc; referenced text belongs to its owner(s).

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