Gentoo: aview Insecure temporary file usage
Posted by Benjamin D. Thomas   
Gentoo An insecure temporary file usage has been reported in aview, leading to symlink attacks.
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Gentoo Linux Security Advisory                           GLSA 200812-14
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: aview: Insecure temporary file usage
      Date: December 14, 2008
      Bugs: #235808
        ID: 200812-14

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Synopsis
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An insecure temporary file usage has been reported in aview, leading to
symlink attacks.

Background
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aview is an ASCII image viewer and animation player.

Affected packages
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    -------------------------------------------------------------------
     Package          /    Vulnerable    /                  Unaffected
    -------------------------------------------------------------------
  1  media-gfx/aview     < 1.3.0_rc1-r1                >=3D 1.3.0_rc1-r1

Description
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Dmitry E. Oboukhov reported that aview uses the "/tmp/aview$$.pgm" file
in an insecure manner when processing files.

Impact
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A local attacker could perform symlink attacks to overwrite arbitrary
files on the system with the privileges of the user running the
application.

Workaround
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There is no known workaround at this time.

Resolution
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All aview users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=3Dmedia-gfx/aview-1.3.0_rc1-r1"=


References
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  [ 1 ] CVE-2008-4935
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=3DCVE-2008-4935

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

  http://security.gentoo.org/glsa/glsa-200812-14.xml

Concerns?
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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 2008 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).

The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.

http://creativecommons.org/licenses/by-sa/2.5