[Full-Disclosure] [ GLSA 200410-08 ] ncompress: Buffer overflow

From: Thierry Carrez (koon_at_gentoo.org)
Date: 10/09/04

  • Next message: Marc Deslauriers: "[Full-Disclosure] [FLSA-2004:2068] Updated httpd packages fix security issues" 
    To: gentoo-announce@lists.gentoo.org
Date: Sat, 09 Oct 2004 20:26:24 +0200

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    Gentoo Linux Security Advisory GLSA 200410-08
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                                                http://security.gentoo.org/
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      Severity: Normal
         Title: ncompress: Buffer overflow
          Date: October 09, 2004
          Bugs: #66251
            ID: 200410-08

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    Synopsis
    ========

    compress and uncompress, which could be used by daemon programs,
    contain a buffer overflow that could lead to remote execution of
    arbitrary code with the rights of the daemon process.

    Background
    ==========

    ncompress is a utility handling compression and decompression of
    Lempel-Ziv archives, compatible with the original *nix compress and
    uncompress utilities (.Z extensions).

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

        -------------------------------------------------------------------
         Package / Vulnerable / Unaffected
        -------------------------------------------------------------------
      1 app-arch/ncompress <= 4.2.4 >= 4.2.4-r1

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

    compress and uncompress do not properly check bounds on command line
    options, including the filename. Large parameters would trigger a
    buffer overflow.

    Impact
    ======

    By supplying a carefully crafted filename or other option, an attacker
    could execute arbitrary code on the system. A local attacker could only
    execute code with his own rights, but since compress and uncompress are
    called by various daemon programs, this might also allow a remote
    attacker to execute code with the rights of the daemon making use of
    ncompress.

    Workaround
    ==========

    There is no known workaround at this time.

    Resolution
    ==========

    All ncompress users should upgrade to the latest version:

        # emerge sync

        # emerge -pv ">=app-arch/ncompress-4.2.4-r1"
        # emerge ">=app-arch/ncompress-4.2.4-r1"

    References
    ==========

      [ 1 ] US-CERT Vulnerability Note VU#176363
            http://www.kb.cert.org/vuls/id/176363

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

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

      http://security.gentoo.org/glsa/glsa-200410-08.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

    _______________________________________________
    Full-Disclosure - We believe in it.
    Charter: http://lists.netsys.com/full-disclosure-charter.html

  • Next message: Marc Deslauriers: "[Full-Disclosure] [FLSA-2004:2068] Updated httpd packages fix security issues"

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