[Full-Disclosure] [RHSA-2003:307-01] Updated zebra packages fix security vulnerabilities

bugzilla_at_redhat.com
Date: 11/13/03

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    Date: Thu, 13 Nov 2003 03:35 -0500
    
    

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                       Red Hat Security Advisory

    Synopsis: Updated zebra packages fix security vulnerabilities
    Advisory ID: RHSA-2003:307-01
    Issue date: 2003-11-13
    Updated on: 2003-11-13
    Product: Red Hat Linux
    Keywords: DoS
    Cross references:
    Obsoletes:
    CVE Names: CAN-2003-0795 CAN-2003-0858
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    1. Topic:

    Updated zebra packages that close a locally-exploitable and a
    remotely-exploitable denial of service vulnerability are now available.

    2. Relevant releases/architectures:

    Red Hat Linux 7.2 - i386, ia64
    Red Hat Linux 7.3 - i386
    Red Hat Linux 8.0 - i386
    Red Hat Linux 9 - i386

    3. Problem description:

    Zebra an open source implementation of TCP/IP routing software.

    Jonny Robertson reported that Zebra can be remotely crashed if a Zebra
    password has been enabled and a remote attacker can connect to the Zebra
    telnet management port. The Common Vulnerabilities and Exposures project
    (cve.mitre.org) has assigned the name CAN-2003-0795 to this issue.

    Herbert Xu reported that Zebra can accept spoofed messages sent on the
    kernel netlink interface by other users on the local machine. This could
    lead to a local denial of service attack. The Common Vulnerabilities and
    Exposures project (cve.mitre.org) has assigned the name CAN-2003-0858 to
    this issue.

    Users of Zebra should upgrade to these erratum packages, which contain
    a patch preventing Zebra from crashing when it receives a telnet option
    delimiter without any option data, and a patch that checks that netlink
    messages actually came from the kernel.

    4. Solution:

    Before applying this update, make sure all previously released errata
    relevant to your system have been applied.

    To update all RPMs for your particular architecture, run:

    rpm -Fvh [filenames]

    where [filenames] is a list of the RPMs you wish to upgrade. Only those
    RPMs which are currently installed will be updated. Those RPMs which are
    not installed but included in the list will not be updated. Note that you
    can also use wildcards (*.rpm) if your current directory *only* contains the
    desired RPMs.

    Please note that this update is also available via Red Hat Network. Many
    people find this an easier way to apply updates. To use Red Hat Network,
    launch the Red Hat Update Agent with the following command:

    up2date

    This will start an interactive process that will result in the appropriate
    RPMs being upgraded on your system.

    If up2date fails to connect to Red Hat Network due to SSL
    Certificate Errors, you need to install a version of the
    up2date client with an updated certificate. The latest version of
    up2date is available from the Red Hat FTP site and may also be
    downloaded directly from the RHN website:

    https://rhn.redhat.com/help/latest-up2date.pxt

    5. Bug IDs fixed (http://bugzilla.redhat.com/bugzilla for more info):

    107140 - CAN-2003-0795 Remote DoS in zebra

    6. RPMs required:

    Red Hat Linux 7.2:

    SRPMS:
    ftp://updates.redhat.com/7.2/en/os/SRPMS/zebra-0.91a-8.7.2.src.rpm

    i386:
    ftp://updates.redhat.com/7.2/en/os/i386/zebra-0.91a-8.7.2.i386.rpm

    ia64:
    ftp://updates.redhat.com/7.2/en/os/ia64/zebra-0.91a-8.7.2.ia64.rpm

    Red Hat Linux 7.3:

    SRPMS:
    ftp://updates.redhat.com/7.3/en/os/SRPMS/zebra-0.92a-5.7.3.src.rpm

    i386:
    ftp://updates.redhat.com/7.3/en/os/i386/zebra-0.92a-5.7.3.i386.rpm

    Red Hat Linux 8.0:

    SRPMS:
    ftp://updates.redhat.com/8.0/en/os/SRPMS/zebra-0.93a-5.8.0.src.rpm

    i386:
    ftp://updates.redhat.com/8.0/en/os/i386/zebra-0.93a-5.8.0.i386.rpm

    Red Hat Linux 9:

    SRPMS:
    ftp://updates.redhat.com/9/en/os/SRPMS/zebra-0.93b-4.9.src.rpm

    i386:
    ftp://updates.redhat.com/9/en/os/i386/zebra-0.93b-4.9.i386.rpm

    7. Verification:

    MD5 sum Package Name
    - --------------------------------------------------------------------------
    1c42972cd3666c8d5c36fe2d4636bbbe 7.2/en/os/SRPMS/zebra-0.91a-8.7.2.src.rpm
    f3c2cd447407735bfa0a6ee3ea107f9c 7.2/en/os/i386/zebra-0.91a-8.7.2.i386.rpm
    2caa6379b78578f62c0267ae703dc552 7.2/en/os/ia64/zebra-0.91a-8.7.2.ia64.rpm
    de79d8ae225cad78b897338307c74f70 7.3/en/os/SRPMS/zebra-0.92a-5.7.3.src.rpm
    09d89f6a6d9ccb46bba080c6d7bc8b93 7.3/en/os/i386/zebra-0.92a-5.7.3.i386.rpm
    4b4a738f98718f4e49c1ad16dfc8c515 8.0/en/os/SRPMS/zebra-0.93a-5.8.0.src.rpm
    1665646ebda30a90ff04a06697b7df5f 8.0/en/os/i386/zebra-0.93a-5.8.0.i386.rpm
    1d1e42921d7e83d7208a4c92aa9523e1 9/en/os/SRPMS/zebra-0.93b-4.9.src.rpm
    73fad11a6b94e96ab66325c5bdac16cd 9/en/os/i386/zebra-0.93b-4.9.i386.rpm

    These packages are GPG signed by Red Hat for security. Our key is
    available from https://www.redhat.com/security/keys.html

    You can verify each package with the following command:
        
        rpm --checksig -v <filename>

    If you only wish to verify that each package has not been corrupted or
    tampered with, examine only the md5sum with the following command:
        
        md5sum <filename>

    8. References:

    http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0795
    http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0858

    9. Contact:

    The Red Hat security contact is <secalert@redhat.com>. More contact
    details at https://www.redhat.com/solutions/security/news/contact.html

    Copyright 2003 Red Hat, Inc.
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