[Full-Disclosure] [ GLSA 200410-01 ] sharutils: Buffer overflows in shar.c and unshar.c

From: Thierry Carrez (koon_at_gentoo.org)
Date: 10/01/04

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    To: gentoo-announce@gentoo.org
    Date: Fri, 01 Oct 2004 14:09:14 +0200
    
    
    

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    Gentoo Linux Security Advisory GLSA 200410-01
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                                                http://security.gentoo.org/
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      Severity: Normal
         Title: sharutils: Buffer overflows in shar.c and unshar.c
          Date: October 01, 2004
          Bugs: #65773
            ID: 200410-01

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    Synopsis
    ========

    sharutils contains two buffer overflow vulnerabilities that could lead
    to arbitrary code execution.

    Background
    ==========

    sharutils contains utilities to manage shell archives.

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

        -------------------------------------------------------------------
         Package / Vulnerable / Unaffected
        -------------------------------------------------------------------
      1 app-arch/sharutils <= 4.2.1-r9 >= 4.2.1-r10

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

    sharutils contains two buffer overflows. Ulf Harnhammar discovered a
    buffer overflow in shar.c, where the length of data returned by the wc
    command is not checked. Florian Schilhabel discovered another buffer
    overflow in unshar.c.

    Impact
    ======

    An attacker could exploit these vulnerabilities to execute arbitrary
    code as the user running one of the sharutils programs.

    Workaround
    ==========

    There is no known workaround at this time.

    Resolution
    ==========

    All sharutils users should upgrade to the latest version:

        # emerge sync

        # emerge -pv ">=app-arch/sharutils-4.2.1-r10"
        # emerge ">=app-arch/sharutils-4.2.1-r10"

    References
    ==========

      [ 1 ] Debian Bug #265904
            http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=265904

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

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

      http://security.gentoo.org/glsa/glsa-200410-01.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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