OSEC

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bugzilla_at_redhat.com
Date: Mon Feb 24 2003 - 19:11:50 CST

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    ---------------------------------------------------------------------
                       Red Hat, Inc. Red Hat Security Advisory

    Synopsis: Updated vte packages fix gnome-terminal vulnerability
    Advisory ID: RHSA-2003:053-10
    Issue date: 2003-02-06
    Updated on: 2003-02-24
    Product: Red Hat Linux
    Keywords: window title
    Cross references:
    Obsoletes:
    CVE Names: CAN-2003-0070
    ---------------------------------------------------------------------

    1. Topic:

    Updated vte packages that fix a vulnerability in gnome-terminal are
    available for Red Hat Linux 8.0.

    2. Relevant releases/architectures:

    Red Hat Linux 8.0 - i386

    3. Problem description:

    VTE is an terminal emulator widget used by software such as gnome-terminal.

    One feature that most terminal emulators support is the ability
    for the shell to set the title of the window using an escape sequence.
    Certain xterm variants also provide an escape sequence for reporting the
    current window title. This essentially takes the current title and places
    it directly on the command line. This feature could be potentially
    exploited if an attacker can cause carefully crafted escape sequences to be
    displayed on a vulnerable terminal emulator used by their victim.

    Since it is not possible to embed a carriage return into the window title
    itself, the attacker would have to convince the victim to hit enter for it
    to process the title as a command, although the attacker can perform a
    number of actions to increase the likelyhood of this happening.

    VTE is vulnerable to this issue and is used as the default terminal
    emulator for versions of gnome-terminal shipped with Red Hat Linux 8.0.
    Previous releases of Red Hat Linux do not contain a vulnerable version of
    gnome-terminal.

    Users of gnome-terminal on Red Hat Linux 8.0 are advised to upgrade to
    these errata packages, which contain a patch to disable the title reporting
    functionality.

    Red Hat would like to thank H D Moore for bringing these issues to our
    attention.

    Please note; because this update contains a fixed shared library used by
    gnome-terminal, the vulnerable code will continue to be in use as long as
    any gnome-terminal session remains active. The easiest way to ensure that
    the vulnerable code is no longer in use is to log out of your window
    manager. Alternatively all running gnome-terminal sessions can be closed.

    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.

    5. RPMs required:

    Red Hat Linux 8.0:

    SRPMS:
    ftp://updates.redhat.com/8.0/en/os/SRPMS/vte-0.8.19-2.src.rpm

    i386:
    ftp://updates.redhat.com/8.0/en/os/i386/vte-0.8.19-2.i386.rpm
    ftp://updates.redhat.com/8.0/en/os/i386/vte-devel-0.8.19-2.i386.rpm

    6. Verification:

    MD5 sum Package Name
    --------------------------------------------------------------------------
    2b91fffb6e98aa9542cbdb3a0508cc49 8.0/en/os/SRPMS/vte-0.8.19-2.src.rpm
    a274eeb1dd40afeed45ea2f7601a6bac 8.0/en/os/i386/vte-0.8.19-2.i386.rpm
    e4172c1224bc77357a0f0a8c315f2dc5 8.0/en/os/i386/vte-devel-0.8.19-2.i386.rpm

    These packages are GPG signed by Red Hat, Inc. for security. Our key
    is available at http://www.redhat.com/about/contact/pgpkey.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>

    7. References:

    http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0070

    8. Contact:

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

    Copyright 2003 Red Hat, Inc.

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