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                                    CERT-Renater

                         Note d'Information No. 2008/VULN075
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DATE                      : 25/02/2008

HARDWARE PLATFORM(S)      : /

OPERATING SYSTEM(S)       : Solaris 10 running Perl 5.8.

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Bug ID: 6629836
Product: Solaris 10 Operating System, Perl 5.8
Date of Workaround Release: 11-Feb-2008

SA Document Body
Security Vulnerability in Solaris 10 Perl 5.8

1. Impact

    An unprivileged local user may be able to cause a Perl application
    to crash, or possibly execute arbitrary code with the privileges
    of the Perl application due to a buffer overflow in the regular
    expression engine.

    The ability to crash a Perl application is a type of Denial of
    Service (DoS). If the Perl application accepts input from remote
    users, the impact can be extended to include remote unprivileged
    users.

    This issue is referenced in the following document:

       CVE-2007-5116 at
       http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-5116

2. Contributing Factors

    This issue can occur in the following releases:

    SPARC Platform

        * Solaris 10

    x86 Platform

        * Solaris 10

    Note: Solaris 8 and Solaris 9 are not affected by this issue.

    This issue only affects Perl versions 5.8.0 and later. Solaris
    10 ships with Perl 5.6.1 in "/usr/perl5/5.6.1/" and Perl 5.8.4
    in "/usr/perl5/5.8.4/". The patches for this issue only apply
    to Perl 5.8.4.

3. Symptoms

    There are no reliable symptoms that would indicate the described
    issue has been exploited to execute arbitrary commands with the
    privileges of the affected Perl application on a host. The
    symptoms of the Denial of Service would be the Perl application
    no longer running.

4. Workaround

    To work around the described issue, check for and remove utf-8
    characters from the user supplied input. However, exact steps
    would differ for each perl use case.

    Or, use perl 5.6.1 instead, available on Solaris 10. Sites can
    modify the path to Perl to use Perl 5.6.1 rather than 5.8.4 in
    their scripts by changing the path to the Perl interpreter from
    /bin/perl or /usr/bin/perl or /usr/perl5/5.8.4/bin/perl to
    /usr/perl5/5.6.1/bin/perl.

    Additional information can be found at
    http://docs.sun.com/app/docs/doc/820-1259/fhkna?a=view

5. Resolution

    A final resolution is pending completion.

    For more information on Security Sun Alerts, see Sun Infodoc
    91209.

    This Sun Alert notification is being provided to you on an "AS
    IS" basis. This Sun Alert notification may contain information
    provided by third parties. The issues described in this Sun Alert
    notification may or may not impact your system(s). Sun makes no
    representations, warranties, or guarantees as to the information
    contained herein. ANY AND ALL WARRANTIES, EXPRESS OR IMPLIED,
    INCLUDING WITHOUT LIMITATION WARRANTIES OF MERCHANTABILITY,
    FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE HEREBY
    DISCLAIMED. BY ACCESSING THIS DOCUMENT YOU ACKNOWLEDGE THAT SUN
    SHALL IN NO EVENT BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
    PUNITIVE, OR CONSEQUENTIAL DAMAGES THAT ARISE OUT OF YOUR USE
    OR FAILURE TO USE THE INFORMATION CONTAINED HEREIN. This Sun
    Alert notification contains Sun proprietary and confidential
    information. It is being provided to you pursuant to the provisions
    of your agreement to purchase services from Sun, or, if you do
    not have such an agreement, the Sun.com Terms of Use. This Sun
    Alert notification may only be used for the purposes contemplated
    by these agreements.

    Copyright 2000-2008 Sun Microsystems, Inc., 4150 Network Circle,
    Santa Clara, CA 95054 U.S.A. All rights reserved.

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