[Full-disclosure] [gentoo-announce] [ GLSA 200506-16 ] cpio: Directory traversal vulnerability

From: Luke Macken (lewk_at_gentoo.org)
Date: 06/20/05

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    Date: Sun, 19 Jun 2005 23:22:55 -0400
To: gentoo-announce@lists.gentoo.org

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    Gentoo Linux Security Advisory GLSA 200506-16
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                                                http://security.gentoo.org/
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      Severity: Normal
         Title: cpio: Directory traversal vulnerability
          Date: June 20, 2005
          Bugs: #90619
            ID: 200506-16

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    Synopsis
    ========

    cpio contains a flaw which may allow a specially crafted cpio archive
    to extract files to an arbitrary directory.

    Background
    ==========

    cpio is a file archival tool which can also read and write tar files.

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

        -------------------------------------------------------------------
         Package / Vulnerable / Unaffected
        -------------------------------------------------------------------
      1 app-arch/cpio < 2.6-r3 >= 2.6-r3

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

    A vulnerability has been found in cpio that can potentially allow a
    cpio archive to extract its files to an arbitrary directory of the
    creator's choice.

    Impact
    ======

    An attacker could create a malicious cpio archive which would create
    files in arbitrary locations on the victim's system. This issue could
    also be used in conjunction with a previous race condition
    vulnerability (CAN-2005-1111) to change permissions on files owned by
    the victim.

    Workaround
    ==========

    There is no known workaround at this time.

    Resolution
    ==========

    All cpio users should upgrade to the latest version:

        # emerge --sync
        # emerge --ask --oneshot --verbose ">=app-arch/cpio-2.6-r3"

    References
    ==========

      [ 1 ] Original Advisory
            http://www.securityfocus.com/archive/1/396429
      [ 2 ] CAN-2005-1111
            http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-1111

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

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

      http://security.gentoo.org/glsa/glsa-200506-16.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 2005 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/2.0 

    


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