[OpenPKG-SA-2005.012] OpenPKG Security Advisory (sudo)

[OpenPKG]

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OpenPKG Security Advisory The OpenPKG Project
http://www.openpkg.org/security.html http://www.openpkg.org
openpkg-security@openpkg.org openpkg@openpkg.org
OpenPKG-SA-2005.012 23-Jun-2005
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Package: sudo
Vulnerability: race condition, arbitrary command execution
OpenPKG Specific: no

Affected Releases: Affected Packages: Corrected Packages:
OpenPKG CURRENT <= sudo-1.6.8p8-20050422 >= sudo-1.6.8p9-20060620
OpenPKG 2.4 <= sudo-1.6.8p8-2.4.0 >= sudo-1.6.8p8-2.4.1
OpenPKG 2.3 <= sudo-1.6.8p7-2.3.0 >= sudo-1.6.8p7-2.3.1

Dependent Packages: none

Description:
According to a vendor security advisory [0] based on hints from
Charles Morris, a race condition exists in the command pathname
handling of Sudo [1] prior to version 1.6.8p9. This could allow a
user with Sudo privileges to run arbitrary commands. Exploitation of
the bug requires that the user be allowed to run one or more commands
via Sudo and be able to create symbolic links in the filesystem.
Furthermore, an entry in the "sudoers" file giving another user access
to the "ALL" pseudo-command must follow the user's entry for the race
to exist. The Common Vulnerabilities and Exposures (CVE) project
assigned the id CAN-2005-1993 [2] to the problem.

Please check whether you are affected by running "<prefix>/bin/openpkg
rpm -q sudo". If you have the "sudo" package installed and its version
is affected (see above), we recommend that you immediately upgrade it
(see Solution) [3][4].

Solution:
Select the updated source RPM appropriate for your OpenPKG release
[5][6], fetch it from the OpenPKG FTP service [7][8] or a mirror
location, verify its integrity [9], build a corresponding binary RPM
from it [3] and update your OpenPKG installation by applying the
binary RPM [4]. For the most recent release OpenPKG 2.4, perform the
following operations to permanently fix the security problem (for
other releases adjust accordingly).

$ ftp ftp.openpkg.org
ftp> bin
ftp> cd release/2.4/UPD
ftp> get sudo-1.6.8p8-2.4.1.src.rpm
ftp> bye
$ <prefix>/bin/openpkg rpm -v --checksig sudo-1.6.8p8-2.4.1.src.rpm
$ <prefix>/bin/openpkg rpm --rebuild sudo-1.6.8p8-2.4.1.src.rpm
$ su -
# <prefix>/bin/openpkg rpm -Fvh <prefix>/RPM/PKG/sudo-1.6.8p8-2.4.1.*.rpm
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References:
[0] http://www.sudo.ws/sudo/alerts/path_race.html
[1] http://www.sudo.ws/
[2] http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-1993
[3] http://www.openpkg.org/tutorial.html#regular-source
[4] http://www.openpkg.org/tutorial.html#regular-binary
[5] ftp://ftp.openpkg.org/release/2.4/UPD/sudo-1.6.8p8-2.4.1.src.rpm
[6] ftp://ftp.openpkg.org/release/2.3/UPD/sudo-1.6.8p7-2.3.1.src.rpm
[7] ftp://ftp.openpkg.org/release/2.4/UPD/
[8] ftp://ftp.openpkg.org/release/2.3/UPD/
[9] http://www.openpkg.org/security.html#signature
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For security reasons, this advisory was digitally signed with the
OpenPGP public key "OpenPKG <openpkg@openpkg.org>" (ID 63C4CB9F) of the
OpenPKG project which you can retrieve from http://pgp.openpkg.org and
hkp://pgp.openpkg.org. Follow the instructions on http://pgp.openpkg.org/
for details on how to verify the integrity of this advisory.
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