[ GLSA 200709-09 ] GNU Tar: Directory traversal vulnerability

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  Severity: Normal
     Title: GNU Tar: Directory traversal vulnerability
      Date: September 15, 2007
      Bugs: #189682
        ID: 200709-09

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Synopsis

A directory traversal vulnerability has been discovered in GNU Tar.

Background

The GNU Tar program provides the ability to create tar archives, as well as various other kinds of manipulation.

Affected packages

     Package       /  Vulnerable  /                         Unaffected
    -------------------------------------------------------------------
  1  app-arch/tar      < 1.18-r2                            >= 1.18-r2

Description

Dmitry V. Levin discovered a directory traversal vulnerability in the contains_dot_dot() function in file src/names.c.

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Impact

By enticing a user to extract a specially crafted tar archive, a remote attacker could extract files to arbitrary locations outside of the specified directory with the permissions of the user running GNU Tar.

Workaround

There is no known workaround at this time.

Resolution

All GNU Tar users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=app-arch/tar-1.18-r2"

References

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  [ 1 ] CVE-2007-4131
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-4131

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website:

  http://security.gentoo.org/glsa/glsa-200709-09.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

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

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