OSEC

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bugzilla_at_redhat.com
Date: Mon Oct 07 2002 - 15:50:36 CDT

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

    Synopsis: Updated fetchmail packages fix vulnerabilities
    Advisory ID: RHSA-2002:215-09
    Issue date: 2002-09-30
    Updated on: 2002-10-07
    Product: Red Hat Linux
    Keywords: fetchmail remote multidrop
    Cross references: RHSA-2002:216
    Obsoletes: RHSA-2002:047
    CVE Names: CAN-2002-1174 CAN-2002-1175
    ---------------------------------------------------------------------

    1. Topic:

    Updated fetchmail packages are available for Red Hat Linux 6.2, 7, 7.1,
    7.2, 7.3, and 8.0 which close a remotely-exploitable vulnerability in
    unpatched versions of fetchmail prior to 6.1.0.

    2. Relevant releases/architectures:

    Red Hat Linux 6.2 - alpha, i386, sparc
    Red Hat Linux 7.0 - alpha, i386
    Red Hat Linux 7.1 - alpha, i386, ia64
    Red Hat Linux 7.2 - i386, ia64
    Red Hat Linux 7.3 - i386
    Red Hat Linux 8.0 - i386

    3. Problem description:

    Fetchmail is a remote mail retrieval and forwarding utility intended for
    use over on-demand TCP/IP links such as SLIP and PPP connections. Two bugs
    have been found in the header parsing code in versions of Fetchmail prior
    to 6.1.0.

    The first bug allows a remote attacker to crash Fetchmail by sending a
    carefully crafted DNS packet. The second bug allows a remote attacker to
    carefully craft an email in such a way that when it is parsed by Fetchmail
    a heap overflow occurs, allowing remote arbitrary code execution.

    Both of these bugs are only exploitable if Fetchmail is being used in
    multidrop mode (using the "multiple-local-recipients" feature).

    All users of Fetchmail are advised to upgrade to the errata packages
    containing a backported fix which is not vulnerable to these issues.

    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 6.2:

    SRPMS:
    ftp://updates.redhat.com/6.2/en/os/SRPMS/fetchmail-5.9.0-18.src.rpm

    alpha:
    ftp://updates.redhat.com/6.2/en/os/alpha/fetchmail-5.9.0-18.alpha.rpm
    ftp://updates.redhat.com/6.2/en/os/alpha/fetchmailconf-5.9.0-18.alpha.rpm

    i386:
    ftp://updates.redhat.com/6.2/en/os/i386/fetchmail-5.9.0-18.i386.rpm
    ftp://updates.redhat.com/6.2/en/os/i386/fetchmailconf-5.9.0-18.i386.rpm

    sparc:
    ftp://updates.redhat.com/6.2/en/os/sparc/fetchmail-5.9.0-18.sparc.rpm
    ftp://updates.redhat.com/6.2/en/os/sparc/fetchmailconf-5.9.0-18.sparc.rpm

    Red Hat Linux 7.0:

    SRPMS:
    ftp://updates.redhat.com/7.0/en/os/SRPMS/fetchmail-5.9.0-19.src.rpm

    alpha:
    ftp://updates.redhat.com/7.0/en/os/alpha/fetchmail-5.9.0-19.alpha.rpm
    ftp://updates.redhat.com/7.0/en/os/alpha/fetchmailconf-5.9.0-19.alpha.rpm

    i386:
    ftp://updates.redhat.com/7.0/en/os/i386/fetchmail-5.9.0-19.i386.rpm
    ftp://updates.redhat.com/7.0/en/os/i386/fetchmailconf-5.9.0-19.i386.rpm

    Red Hat Linux 7.1:

    SRPMS:
    ftp://updates.redhat.com/7.1/en/os/SRPMS/fetchmail-5.9.0-19.src.rpm

    alpha:
    ftp://updates.redhat.com/7.1/en/os/alpha/fetchmail-5.9.0-19.alpha.rpm
    ftp://updates.redhat.com/7.1/en/os/alpha/fetchmailconf-5.9.0-19.alpha.rpm

    i386:
    ftp://updates.redhat.com/7.1/en/os/i386/fetchmail-5.9.0-19.i386.rpm
    ftp://updates.redhat.com/7.1/en/os/i386/fetchmailconf-5.9.0-19.i386.rpm

    ia64:
    ftp://updates.redhat.com/7.1/en/os/ia64/fetchmail-5.9.0-19.ia64.rpm
    ftp://updates.redhat.com/7.1/en/os/ia64/fetchmailconf-5.9.0-19.ia64.rpm

    Red Hat Linux 7.2:

    SRPMS:
    ftp://updates.redhat.com/7.2/en/os/SRPMS/fetchmail-5.9.0-20.src.rpm

    i386:
    ftp://updates.redhat.com/7.2/en/os/i386/fetchmail-5.9.0-20.i386.rpm
    ftp://updates.redhat.com/7.2/en/os/i386/fetchmailconf-5.9.0-20.i386.rpm

    ia64:
    ftp://updates.redhat.com/7.2/en/os/ia64/fetchmail-5.9.0-20.ia64.rpm
    ftp://updates.redhat.com/7.2/en/os/ia64/fetchmailconf-5.9.0-20.ia64.rpm

    Red Hat Linux 7.3:

    SRPMS:
    ftp://updates.redhat.com/7.3/en/os/SRPMS/fetchmail-5.9.0-20.src.rpm

    i386:
    ftp://updates.redhat.com/7.3/en/os/i386/fetchmail-5.9.0-20.i386.rpm
    ftp://updates.redhat.com/7.3/en/os/i386/fetchmailconf-5.9.0-20.i386.rpm

    Red Hat Linux 8.0:

    SRPMS:
    ftp://updates.redhat.com/8.0/en/os/SRPMS/fetchmail-5.9.0-21.src.rpm

    i386:
    ftp://updates.redhat.com/8.0/en/os/i386/fetchmail-5.9.0-21.i386.rpm

    6. Verification:

    MD5 sum Package Name
    --------------------------------------------------------------------------
    d7cf2f1fbaea0cb6cfa6217e17863ab8 6.2/en/os/SRPMS/fetchmail-5.9.0-18.src.rpm
    e525d26cb26ccb3a18b47440f9109a7b 6.2/en/os/alpha/fetchmail-5.9.0-18.alpha.rpm
    8991272f26c0ff7da36f7c3efbc0cfdf 6.2/en/os/alpha/fetchmailconf-5.9.0-18.alpha.rpm
    ea52cc0a883ac87c58cb1a8bd5bc8b5c 6.2/en/os/i386/fetchmail-5.9.0-18.i386.rpm
    77e19ef5643b65ea1bf79724b460de86 6.2/en/os/i386/fetchmailconf-5.9.0-18.i386.rpm
    eefc1f08bf8943330c3d326d34455280 6.2/en/os/sparc/fetchmail-5.9.0-18.sparc.rpm
    112df3d132d8008328762ff9aec031b5 6.2/en/os/sparc/fetchmailconf-5.9.0-18.sparc.rpm
    290204c231b27011ed42530c1c941ed7 7.0/en/os/SRPMS/fetchmail-5.9.0-19.src.rpm
    ebc6d8dd7596ed610ddf7dbce6676eb0 7.0/en/os/alpha/fetchmail-5.9.0-19.alpha.rpm
    88d6fc42260a1f60d61233273b4d7acf 7.0/en/os/alpha/fetchmailconf-5.9.0-19.alpha.rpm
    036a53d4e02c62eae40196ab582b57e3 7.0/en/os/i386/fetchmail-5.9.0-19.i386.rpm
    8e16810e7904d723e19c3fb519939eb3 7.0/en/os/i386/fetchmailconf-5.9.0-19.i386.rpm
    290204c231b27011ed42530c1c941ed7 7.1/en/os/SRPMS/fetchmail-5.9.0-19.src.rpm
    ebc6d8dd7596ed610ddf7dbce6676eb0 7.1/en/os/alpha/fetchmail-5.9.0-19.alpha.rpm
    88d6fc42260a1f60d61233273b4d7acf 7.1/en/os/alpha/fetchmailconf-5.9.0-19.alpha.rpm
    036a53d4e02c62eae40196ab582b57e3 7.1/en/os/i386/fetchmail-5.9.0-19.i386.rpm
    8e16810e7904d723e19c3fb519939eb3 7.1/en/os/i386/fetchmailconf-5.9.0-19.i386.rpm
    ae1c1455734a3e2bb8469ed1c8d25238 7.1/en/os/ia64/fetchmail-5.9.0-19.ia64.rpm
    f2997a87e0d8fa7a6e30e0d6f4c35e0b 7.1/en/os/ia64/fetchmailconf-5.9.0-19.ia64.rpm
    ce79caaa93a34a1a67b6f5eb6a86efe9 7.2/en/os/SRPMS/fetchmail-5.9.0-20.src.rpm
    7a3c7973c958b5c341598d3ec11d4667 7.2/en/os/i386/fetchmail-5.9.0-20.i386.rpm
    1d2f26c2c575afac0a1a594ba5579205 7.2/en/os/i386/fetchmailconf-5.9.0-20.i386.rpm
    b50653f90668c24b6c326bb5dc225b6d 7.2/en/os/ia64/fetchmail-5.9.0-20.ia64.rpm
    8e8c7bb8fefc064f833a1f6dc7faa79f 7.2/en/os/ia64/fetchmailconf-5.9.0-20.ia64.rpm
    ce79caaa93a34a1a67b6f5eb6a86efe9 7.3/en/os/SRPMS/fetchmail-5.9.0-20.src.rpm
    7a3c7973c958b5c341598d3ec11d4667 7.3/en/os/i386/fetchmail-5.9.0-20.i386.rpm
    1d2f26c2c575afac0a1a594ba5579205 7.3/en/os/i386/fetchmailconf-5.9.0-20.i386.rpm
    682b5845b2fb89462eed4102e6c9a807 8.0/en/os/SRPMS/fetchmail-5.9.0-21.src.rpm
    4c475d641dda1ed3fb553461b79d2b5c 8.0/en/os/i386/fetchmail-5.9.0-21.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 <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:
        rpm --checksig --nogpg <filename>

    7. References:

    http://tuxedo.org/~esr/fetchmail/NEWS
    http://security.e-matters.de/advisories/032002.html
    http://www.kb.cert.org/vuls/id/738331
    http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2002-1174
    http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2002-1175

    Copyright(c) 2000, 2001, 2002 Red Hat, Inc.

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