[VulnWatch] SRT2003-07-08-1223 - IBM U2 UniVerse uvadm can take root via buffer overflows

From: KF (dotslash_at_snosoft.com)
Date: 07/16/03

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    Date: Tue, 15 Jul 2003 20:48:45 -0400
    To: bugtraq <bugtraq@securityfocus.com>

    Thanks to IBM for being so receptive with these issues.

    For those of you that have requested we revive the old "Snosoft"
    advisories we have begun placing our legacy advisories at
    http://www.secnetops.biz as time permits.


    Secure Network Operations, Inc. http://www.secnetops.com
    Strategic Reconnaissance Team research@secnetops.com
    Team Lead Contact kf@secnetops.com

    Our Mission:
    Secure Network Operations offers expertise in Networking, Intrusion
    Detection Systems (IDS), Software Security Validation, and
    Corporate/Private Network Security. Our mission is to facilitate a
    secure and reliable Internet and inter-enterprise communications
    infrastructure through the products and services we offer.

    Quick Summary:
    Advisory Number : SRT2003-07-08-1223
    Product : IBM U2 UniVerse
    Version : Version <= ?
    Vendor : http://ibm.com/software/data/u2/universe/
    Class : local
    Criticality : High (to UniVerse servers with local users)
    Operating System(s) : Only confirmed on Linux (other unix based?)

    High Level Explanation
    High Level Description : uvadm can take root via buffer overflows
    What to do : chmod -s /usr/ibm/uv/bin/uvadmsh

    Technical Details
    Proof Of Concept Status : SNO does have Poc code
    Low Level Description :

    UniVerse is an extended relational database designed for embedding in
    vertical applications. Its nested relational data model results in
    intuitive data modeling and fewer resulting tables. UniVerse provides
    data access, storage and management capabilities across Microsoft®
    Windows® NT, Linux and UNIplatform.

    The uvadm user may exploit a buffer overflow in the uvadmsh binary to
    take root. There is a buffer overflow when processing command line
    arguments. Please note that without the -uv.install argument this issue
    is NOT exploitable however the overflow still occurs.

    (gdb) r -uv.install `perl -e 'print "Z" x 546'`
    Starting program: uvadmsh -uv.install `perl -e 'print "Z" x 546'`

    Program received signal SIGSEGV, Segmentation fault.
    0x5a5a5a5a in ?? ()
    (gdb) bt
    #0 0x5a5a5a5a in ?? ()
    Cannot access memory at address 0x5a5a5a5a

    You must have uvadm rights in order to exploit this issue. The
    creation and use of the Unix user 'uvadm' is optional for UniVerse.
    It is not required for the successfull installation, configuration and
    administration of UniVerse. The intended use of uvadm is to allow a
    selected, specific non-root user to perform all aspects of UniVerse

    [uvadm@vegeta tmp]$ id
    uid=503(uvadm) gid=503(uvadm) groups=503(uvadm)
    [uvadm@vegeta tmp]$ ./uvadm_root.pl
    sh-2.05b# id
    uid=0(root) gid=503(uvadm) groups=503(uvadm)

    Patch or Workaround : chmod -s /usr/ibm/uv/bin/uvadmsh

    Note: If you decide to 'chmod -s uvadmsh', you will need to be a root
    user to perform all of the uvadmsh functions.

    Vendor Status : The IBM U2 staff will have this issue resolved
    in a future release of IBM U2. Patches may also be supplied on a per
    client basis at IBM's disgression.

    Bugtraq URL : to be assigned

    This advisory was released by Secure Network Operations,Inc. as a matter
    of notification to help administrators protect their networks against
    the described vulnerability. Exploit source code is no longer released
    in our advisories. Contact research@secnetops.com for information on how
    to obtain exploit information.

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