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[OpenPKG-SA-2004.031] OpenPKG Security Advisory (dhcpd)
From: OpenPKG <openpkg () openpkg org>
Date: Thu, 8 Jul 2004 21:38:32 +0200
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OpenPKG Security Advisory The OpenPKG Project
openpkg-security () openpkg org openpkg () openpkg org
Vulnerability: denial of service, arbitrary code execution
OpenPKG Specific: no
Affected Releases: Affected Packages: Corrected Packages:
OpenPKG CURRENT <= dhcpd-3.0.1rc13-20040524 >= dhcpd-3.0.1rc14-20040623
OpenPKG 2.0 <= dhcpd-3.0.1rc13-2.0.0 >= dhcpd-3.0.1rc13-2.0.1
OpenPKG 1.3 <= dhcpd-3.0.1rc11-1.3.0 >= dhcpd-3.0.1rc11-1.3.1
Affected Releases: Dependent Packages: none
As reported by US-CERT  Gregory Duchemin discovered several
vulnerabilities in the ISC DHCP Distribution .
Several buffer overflows were closed in logging messages with
excessively long hostnames provided by the clients. The Common
Vulnerabilities and Exposures (CVE) project assigned the id
CAN-2004-0460  to the problem.
Another issue was evident on some specific platforms where the dhcpd
build mechanism ignored the existence of [v]snprintf(3) functions
and used the weaker [v]sprintf(3) which lack boundary checking. The
RELEASE updates enforce use of the favorable functions after it was
verified they exist on all platforms supported by OpenPKG. The CURRENT
update contains a vendor fix explicitly providing a suitable function.
The Common Vulnerabilities and Exposures (CVE) project assigned the id
CAN-2004-0461  to the problem.
Please check whether you are affected by running "<prefix>/bin/rpm
-q dhcpd". If you have the "dhcpd" package installed and its version
is affected (see above), we recommend that you immediately upgrade
it (see Solution) .
Select the updated source RPM appropriate for your OpenPKG release
, fetch it from the OpenPKG FTP service  or a mirror
location, verify its integrity , build a corresponding binary RPM
from it  and update your OpenPKG installation by applying the
binary RPM . For the most recent release OpenPKG 2.0, perform the
following operations to permanently fix the security problem (for
other releases adjust accordingly).
$ ftp ftp.openpkg.org
ftp> cd release/2.0/UPD
ftp> get dhcpd-3.0.1rc13-2.0.1.src.rpm
$ <prefix>/bin/openpkg rpm -v --checksig dhcpd-3.0.1rc13-2.0.1.src.rpm
$ <prefix>/bin/openpkg rpm --rebuild dhcpd-3.0.1rc13-2.0.1.src.rpm
$ su -
# <prefix>/bin/openpkg rpm -Fvh <prefix>/RPM/PKG/dhcpd-3.0.1rc13-2.0.1.*.rpm
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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Comment: OpenPKG <openpkg () openpkg org>
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Full-Disclosure - We believe in it.
- [OpenPKG-SA-2004.031] OpenPKG Security Advisory (dhcpd) OpenPKG (Jul 09)