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Gentoo: WordNet Execution of arbitrary code Print E-mail
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Posted by Benjamin D. Thomas   
Gentoo Multiple vulnerabilities were found in WordNet, possibly allowing for the execution of arbitrary code.
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Gentoo Linux Security Advisory                           GLSA 200810-01
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: WordNet: Execution of arbitrary code
      Date: October 07, 2008
      Bugs: #211491
        ID: 200810-01

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Synopsis
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Multiple vulnerabilities were found in WordNet, possibly allowing for
the execution of arbitrary code.

Background
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WordNet is a large lexical database of English.

Affected packages
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    -------------------------------------------------------------------
     Package            /  Vulnerable  /                    Unaffected
    -------------------------------------------------------------------
  1  app-dicts/wordnet      < 3.0-r2                         >=3D 3.0-r2

Description
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Jukka Ruohonen initially reported a boundary error within the
searchwn() function in src/wn.c. A thorough investigation by the oCERT
team revealed several other vulnerabilities in WordNet:

* Jukka Ruohonen and Rob Holland (oCERT) reported multiple boundary
  errors within the searchwn() function in src/wn.c, the wngrep()
  function in lib/search.c, the morphstr() and morphword() functions in
  lib/morph.c, and the getindex() in lib/search.c, which lead to
  stack-based buffer overflows.

* Rob Holland (oCERT) reported two boundary errors within the
  do_init() function in lib/morph.c, which lead to stack-based buffer
  overflows via specially crafted "WNSEARCHDIR" or "WNHOME" environment
  variables.

* Rob Holland (oCERT) reported multiple boundary errors in the
  bin_search() and bin_search_key() functions in binsrch.c, which lead
  to stack-based buffer overflows via specially crafted data files.

* Rob Holland (oCERT) reported a boundary error within the
  parse_index() function in lib/search.c, which leads to a heap-based
  buffer overflow via specially crafted data files.

Impact
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* In case the application is accessible e.g. via a web server, a
  remote attacker could pass overly long strings as arguments to the
  "wm" binary, possibly leading to the execution of arbitrary code.

* A local attacker could exploit the second vulnerability via
  specially crafted "WNSEARCHDIR" or "WNHOME" environment variables,
  possibly leading to the execution of arbitrary code with escalated
  privileges.

* A local attacker could exploit the third and fourth vulnerability
  by making the application use specially crafted data files, possibly
  leading to the execution of arbitrary code.

Workaround
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There is no known workaround at this time.

Resolution
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All WordNet users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=3Dapp-dicts/wordnet-3.0-r2"

References
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  [ 1 ] CVE-2008-2149
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=3DCVE-2008-2149
  [ 2 ] CVE-2008-3908
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=3DCVE-2008-3908

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-200810-01.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
 
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