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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-2004.022 19-May-2004
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Package: cvs
Vulnerability: remote code execution
OpenPKG Specific: no
Affected Releases: Affected Packages: Corrected Packages:
OpenPKG CURRENT <= cvs-1.12.7-20040414 >= cvs-1.12.8-20040519
OpenPKG 2.0 <= cvs-1.12.5-2.0.1 >= cvs-1.12.5-2.0.2
OpenPKG 1.3 <= cvs-1.12.1-1.3.4 >= cvs-1.12.1-1.3.5
Dependent Packages: none
Description:
Stefan Esser discovered [1] a remote vulnerability in Concurrent
Versions System (CVS) [0] servers. CVS up to version 1.12.7 contains
a flaw when deciding if a CVS entry line should get a modified or
unchanged flag attached. This results in a heap overflow which can
be exploited to execute arbitrary code on the CVS server. This
could allow a repository compromise. The Common Vulnerabilities and
Exposures (CVE) project assigned the id CAN-2004-0396 [2] to the
problem.
Please check whether you are affected by running "/bin/rpm
-q cvs". If you have the "cvs" 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 2.0, perform the
following operations to permanently fix the security problem (for
other releases adjust accordingly).
$ ftp ftp.openpkg.org
ftp> bin
ftp> cd release/2.0/UPD
ftp> get cvs-1.12.5-2.0.2.src.rpm
ftp> bye
$ /bin/openpkg rpm -v --checksig cvs-1.12.5-2.0.2.src.rpm
$ /bin/openpkg rpm --rebuild cvs-1.12.5-2.0.2.src.rpm
$ su -
# /bin/openpkg rpm -Fvh /RPM/PKG/cvs-1.12.5-2.0.2.*.rpm
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References:
[0] http://www.cvshome.org/
[1] http://security.e-matters.de/advisories/072004.html
[2] http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0396
[3] http://www.openpkg.org/tutorial.html#regular-source
[4] http://www.openpkg.org/tutorial.html#regular-binary
[5] ftp://ftp.openpkg.org/release/1.3/UPD/cvs-1.12.1-1.3.5.src.rpm
[6] ftp://ftp.openpkg.org/release/2.0/UPD/cvs-1.12.5-2.0.2.src.rpm
[7] ftp://ftp.openpkg.org/release/1.3/UPD/
[8] ftp://ftp.openpkg.org/release/2.0/UPD/
[9] http://www.openpkg.org/security.html#signature
________________________________________________________________________
For security reasons, this advisory was digitally signed with the
OpenPGP public key "OpenPKG " (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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