[Full-Disclosure] [ GLSA 200408-26 ] zlib: Denial of service vulnerability

From: Sune Kloppenborg Jeppesen (jaervosz_at_gentoo.org)
Date: 08/27/04

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Date: Fri, 27 Aug 2004 20:48:13 +0200

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    Gentoo Linux Security Advisory GLSA 200408-26
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                                                http://security.gentoo.org/
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      Severity: Normal
         Title: zlib: Denial of service vulnerability
          Date: August 27, 2004
          Bugs: #61749
            ID: 200408-26

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    Synopsis
    ========

    The zlib library contains a Denial of Service vulnerability.

    Background
    ==========

    zlib is a general-purpose data-compression library.

    Affected packages
    =================

        -------------------------------------------------------------------
         Package / Vulnerable / Unaffected
        -------------------------------------------------------------------
      1 sys-libs/zlib <= 1.2.1-r2 >= 1.2.1-r3

    Description
    ===========

    zlib contains a bug in the handling of errors in the "inflate()" and
    "inflateBack()" functions.

    Impact
    ======

    An attacker could exploit this vulnerability to launch a Denial of
    Service attack on any application using the zlib library.

    Workaround
    ==========

    There is no known workaround at this time. All users are encouraged to
    upgrade to the latest available version of zlib.

    Resolution
    ==========

    All zlib users should upgrade to the latest version:

        # emerge sync

        # emerge -pv ">=sys-libs/zlib-1.2.1-r3"
        # emerge ">=sys-libs/zlib-1.2.1-r3"

    You should also run revdep-rebuild to rebuild any packages that depend
    on older versions of zlib :

        # revdep-rebuild

    References
    ==========

      [ 1 ] OpenPKG-SA-2004.038-zlib
            http://www.openpkg.org/security/OpenPKG-SA-2004.038-zlib.html

    Availability
    ============

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

      http://security.gentoo.org/glsa/glsa-200408-26.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 2004 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/1.0
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    _______________________________________________
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    Relevant Pages

    • [NEWS] Double Free Bug in zlib Compression Library
      ... The following security advisory is sent to the securiteam mailing list, and can be found at the SecuriTeam web site: http://www.securiteam.com ... There is a bug in the zlib compression library that may manifest ... itself as a vulnerability in programs that are linked with zlib. ...
      (Securiteam)
    • [OpenPKG-SA-2002.003] OpenPKG Security Advisory (zlib)
      ... Dependent Packages: ... According to a Zlib Security Advisory and the original CERT ... $ ftp ftp.openpkg.org ...
      (Bugtraq)
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    • [ GLSA 200408-26 ] zlib: Denial of service vulnerability
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    • MDKSA-2002:022 - zlib update
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