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From: FreeBSD Security Advisories (security-advisoriesFreeBSD.org)
Date: Wed Feb 07 2001 - 13:44:59 CST

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    =============================================================================
    FreeBSD-SA-01:21 Security Advisory
                                                                    FreeBSD, Inc.

    Topic: ja-elvis and ko-helvis ports contain a local
                    root compromise

    Category: ports
    Module: ja-elvis/ko-helvis
    Announced: 2001-02-07
    Credits: Found during internal auditing
    Affects: Ports collection prior to the correction date.
    Corrected: 2001-01-28
    Vendor status: Vendor notified
    FreeBSD only: No

    I. Background

    The ja-elvis and ko-helvis ports are localized versions of elvis,
    a vi editor clone.

    II. Problem Description

    The ja-elvis and ko-helvis ports, versions prior to ja-elvis-1.8.4_1
    and ko-helvis-1.8h2_1, contain an exploitable buffer overflow in the
    elvrec utility. Because elvrec is setuid root, unprivileged local
    users may gain root privileges on the local system.

    The ja-elvis and ko-helvis ports are not installed by default, nor
    are they "part of FreeBSD" as such: they are 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 root privileges on the local
    system.

    If you have not chosen to install the ja-elvis or ko-helvis
    ports/packages, then your system is not vulnerable to this problem.

    IV. Workaround

    Deinstall the ja-elvis or ko-helvis port/package, if you have
    installed it.

    V. Solution

    One of the following:

    1) Upgrade your entire ports collection and rebuild the ja-elvis or
    ko-helvis port.

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

    [i386]

    [ja-elvis]
    ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-3-stable/japanese/ja-elvis-1.8.4_1.tgz
    ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-4-stable/japanese/ja-elvis-1.8.4_1.tgz
    ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/alpha/packages-4-stable/japanese/ja-elvis-1.8.4_1.tgz
    ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-5-current/japanese/ja-elvis-1.8.4_1.tgz
    ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/alpha/packages-5-current/japanese/ja-elvis-1.8.4_1.tgz

    [ko-helvis]
    ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-3-stable/korean/ko-helvis-1.8h2_1.tgz
    ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-4-stable/korean/ko-helvis-1.8h2_1.tgz
    ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/alpha/packages-4-stable/korean/ko-helvis-1.8h2_1.tgz
    ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-5-current/korean/ko-helvis-1.8h2_1.tgz
    ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/alpha/packages-5-current/korean/ko-helvis-1.8h2_1.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 ja-elvis or ko-helvis 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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