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IBM SECURITY ADVISORY

First Issued: Wed May 21 11:27:51 CDT 2008
===============================================================================
                           VULNERABILITY SUMMARY

VULNERABILITY:   AIX OpenSSH multiple vulnerabilities

PLATFORMS:       AIX 5.2, 5.3, 6.1

SOLUTION:        Apply the fix as described below.

THREAT:          See below

CERT VU Number:  n/a
CVE Numbers:     CVE-2008-1657 CVE-2008-1483    
===============================================================================
                           DETAILED INFORMATION

I. DESCRIPTION

    CVE-2008-1483:
    OpenSSH 4.3p2, and probably other versions, allows local users to
    hijack forwarded X connections by causing ssh to set DISPLAY to
    :10, even when another process is listening on the associated
    port, as demonstrated by opening TCP port 6010 (IPv4) and sniffing
    a cookie sent by Emacs.

    CVE-2008-1657:
    OpenSSH before 4.9 allows remote authenticated users to bypass the
    sshd_config ForceCommand directive by modifying the .ssh/rc
    session file.

II. PLATFORM VULNERABILITY ASSESSMENT

    To determine if your system is vulnerable, execute the following
    command:

    lslpp -L openssh.base.server

    The following fileset levels are vulnerable:

    AIX 6.1: all versions less than 4.7.0.5301
    AIX 5.3: all versions less than 4.7.0.5301
    AIX 5.2: all versions less than 4.7.0.5201

III. FIXES

    A fix is available, and it can be downloaded from:

    AIX 5.2:
    http://downloads.sourceforge.net/openssh-aix/openssh-4.7_5201.tar.Z
    AIX 5.3:
    http://downloads.sourceforge.net/openssh-aix/openssh-4.7_5301.tar.Z
    AIX 6.1:
    http://downloads.sourceforge.net/openssh-aix/openssh-4.7_5301aix61.tar.Z

IV. WORKAROUNDS

    There are no workarounds.

V. CONTACT INFORMATION

    If you would like to receive AIX Security Advisories via email,
    please visit:

        http://www14.software.ibm.com/webapp/set2/subscriptions/pqvcmjd
 
    Comments regarding the content of this announcement can be
    directed to:

        security-alert@austin.ibm.com

    To request the PGP public key that can be used to communicate
    securely with the AIX Security Team you can either:

        A. Send an email with "get key" in the subject line to:

            security-alert@austin.ibm.com

        B. Download the key from a PGP Public Key Server. The key ID is:

            0xADA6EB4D

    Please contact your local IBM AIX support center for any
    assistance.

    eServer is a trademark of International Business Machines
    Corporation.  IBM, AIX and pSeries are registered trademarks of
    International Business Machines Corporation.  All other trademarks
    are property of their respective holders.
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