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From: FreeBSD Security Advisories (security-advisoriesFreeBSD.org)
Date: Mon Apr 23 2001 - 22:20:32 CDT

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    =============================================================================
    FreeBSD-SA-01:35 Security Advisory
                                                                    FreeBSD, Inc.

    Topic: licq contains multiple remote vulnerabilities

    Category: ports
    Module: licq
    Announced: 2001-04-23
    Credits: Stan Bubrouski <stanccs.neu.edu>
    Affects: Ports collection prior to the correction date.
    Corrected: 2001-03-13
    Vendor status: Updated version released
    FreeBSD only: NO

    I. Background

    licq is an ICQ client.

    II. Problem Description

    The licq port, versions prior to 1.0.3, contains a vulnerability in
    URL parsing. URLs received by the licq program are passed to the
    web browser using the system() function. Since licq performs no
    sanity checking, a remote attacker may be able to pipe commands
    contained in the URL causing the client to execute arbitrary
    commands. Additionally, the licq program also contains a buffer
    overflow in the logging functions allowing a remote attacker to
    cause licq to crash and potentially execute arbitbrary code on the
    local machine as the user running licq.

    The licq port is not installed by default, nor is it "part of FreeBSD"
    as such: it is part of the FreeBSD ports collection, which contains
    over 5000 third-party applications in a ready-to-install format. The
    ports collections shipped with FreeBSD 3.5.1 and 4.2 contain this
    problem since it was discovered after the releases. The ports
    collection that shipped with FreeBSD 4.3 is not vulnerable since this
    problem was corrected prior to the release.

    FreeBSD makes no claim about the security of these third-party
    applications, although an effort is underway to provide a security
    audit of the most security-critical ports.

    III. Impact

    Remote attackers may be able to crash licq or execute arbitrary
    commands on the local machine as the user running the licq program.

    If you have not chosen to install the licq port/package, then your
    system is not vulnerable to this problem.

    IV. Workaround

    Deinstall the licq port/package if you have installed it.

    V. Solution

    One of the following:

    1) Upgrade your entire ports collection and rebuild the licq port.

    2) Deinstall the old package and install a new package dated after the
    correction date, obtained from:

    [i386]
    ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-4-stable/net/licq-1.0.3.tgz
    ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-5-current/net/licq-1.0.3.tgz

    [alpha]
    Packages are not automatically generated for the alpha architecture at
    this time due to lack of build resources.

    3) download a new port skeleton for the licq port from:

    http://www.freebsd.org/ports/

    and use it to rebuild the port.

    4) Use the portcheckout utility to automate option (3) above. The
    portcheckout port is available in /usr/ports/devel/portcheckout or the
    package can be obtained from:

    ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-3-stable/devel/portcheckout-2.0.tgz
    ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-4-stable/devel/portcheckout-2.0.tgz
    ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/alpha/packages-4-stable/devel/portcheckout-2.0.tgz
    ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-5-current/devel/portcheckout-2.0.tgz
    ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/alpha/packages-5-current/devel/portcheckout-2.0.tgz

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