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Gentoo Linux Security Advisory                           GLSA 200906-02
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: Ruby: Denial of Service
      Date: June 28, 2009
      Bugs: #273213
        ID: 200906-02

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Synopsis
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A flaw in the Ruby standard library might allow remote attackers to
cause a Denial of Service attack.

Background
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Ruby is an interpreted object-oriented programming language. The
elaborate standard library includes the "BigDecimal" class.

Affected packages
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    -------------------------------------------------------------------
     Package        /   Vulnerable   /                      Unaffected
    -------------------------------------------------------------------
  1  dev-lang/ruby     < 1.8.6_p369                      >=3D 1.8.6_p369

Description
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Tadayoshi Funaba reported that BigDecimal in
ext/bigdecimal/bigdecimal.c does not properly handle string arguments
containing overly long numbers.

Impact
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A remote attacker could exploit this issue to remotely cause a Denial
of Service attack.

Workaround
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There is no known workaround at this time.

Resolution
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All Ruby users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=3Ddev-lang/ruby-1.8.6_p369"

References
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  [ 1 ] CVE-2009-1904
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=3DCVE-2009-1904

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-200906-02.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 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