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From: FreeBSD Security Advisories (security-advisoriesFreeBSD.org)
Date: Wed Feb 07 2001 - 14:38:11 CST

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    =============================================================================
    FreeBSD-SA-01:22 Security Advisory
                                                                    FreeBSD, Inc.

    Topic: dc20ctrl port contains a locally exploitable buffer overflow
                    yielding gid dialer

    Category: ports
    Module: dc20ctrl
    Announced: 2001-02-07
    Credits: Found during internal auditing
    Affects: Ports collection prior to the correction date.
    Corrected: 2001-02-07
    Vendor status: Vendor notified
    FreeBSD only: No

    I. Background

    dc20ctrl is a program to control Kodak DC20 digital cameras.

    II. Problem Description

    The dc20ctrl port, versions prior to 0.4_1, contains a locally
    exploitable buffer overflow. Because the dc20ctrl program is also
    setgid dialer, unprivileged local users may gain gid dialer on the
    local system. This may allow the users to gain unauthorized access to
    the serial port devices.

    The dc20ctrl 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 4500 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.

    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

    Unprivileged local users may gain increased privileges on the local
    system including potentially unauthorized access to the serial port
    devices.

    If you have not chosen to install the dc20ctrl port/package, then
    your system is not vulnerable to this problem.

    IV. Workaround

    Deinstall the dc20ctrl port/package, if you have installed it.

    V. Solution

    One of the following:

    1) Upgrade your entire ports collection and rebuild the dc20ctrl 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-3-stable/graphics/dc20ctrl-0.4_1.tgz
    ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-4-stable/graphics/dc20ctrl-0.4_1.tgz
    ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/alpha/packages-4-stable/graphics/dc20ctrl-0.4_1.tgz
    ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-5-current/graphics/dc20ctrl-0.4_1.tgz
    ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/alpha/packages-5-current/graphics/dc20ctrl-0.4_1.tgz

    NOTE: it may be several days before updated packages are available.

    [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 dc20ctrl 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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