Gentoo: GCC-XML Insecure temporary file usage
Posted by Benjamin D. Thomas   
Gentoo =3D=3D=3D=3D=3D=3D=3D=3D An insecure temporary file usage has been reported in GCC-XML allowing for symlink attacks.
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Gentoo Linux Security Advisory                           GLSA 200909-11
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: GCC-XML: Insecure temporary file usage
      Date: September 09, 2009
      Bugs: #245765
        ID: 200909-11

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Synopsis
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An insecure temporary file usage has been reported in GCC-XML allowing
for symlink attacks.

Background
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GCC-XML is an XML output extension to the C++ front-end of GCC.

Affected packages
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    -------------------------------------------------------------------
     Package         /       Vulnerable       /             Unaffected
    -------------------------------------------------------------------
  1  dev-cpp/gccxml      < 0.9.0_pre20090516      >=3D 0.9.0_pre20090516

Description
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Dmitry E. Oboukhov reported that find_flags in GCC-XML does not handle
"/tmp/*.cxx" temporary files securely.

Impact
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A local attacker could perform symlink attacks to overwrite arbitrary
files 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 GCC-XML users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose =3Ddev-cpp/gccxml-0.9.0_pre20090516

References
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  [ 1 ] CVE-2008-4957
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=3DCVE-2008-4957

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-200909-11.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
https://bugs.gentoo.org.

License
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Copyright 2009 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