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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-2004.036 06-Aug-2004
________________________________________________________________________
Package: cvstrac
Vulnerability: arbitrary code execution
OpenPKG Specific: no
Affected Releases: Affected Packages: Corrected Packages:
OpenPKG CURRENT <= cvstrac-1.1.3-20040505 >= cvstrac-1.1.3-20040806
OpenPKG 2.1 <= cvstrac-1.1.3-2.1.0 >= cvstrac-1.1.3-2.1.1
OpenPKG 2.0 <= cvstrac-1.1.2-2.0.0 >= cvstrac-1.1.2-2.0.1
Dependent Packages: none
Description:
As reported on BugTraq [1], Richard Ngo discovered a vulnerability
in the CVS repository web browsing tool CVSTrac [2]. If properly
exploited an attacker can execute arbitrary code on the CVSTrac host
with the privileges of the associated web server.
Please check whether you are affected by running "<prefix>/bin/openpkg
rpm -q cvstrac". If you have the "cvstrac" 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] and 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 2.1, perform the
following operations to permanently fix the security problem (for
other releases adjust accordingly).
$ ftp ftp.openpkg.org
ftp> bin
ftp> cd release/2.1/UPD
ftp> get cvstrac-1.1.3-2.1.1.src.rpm
ftp> bye
$ <prefix>/bin/openpkg rpm -v --checksig cvstrac-1.1.3-2.1.1.src.rpm
$ <prefix>/bin/openpkg rpm --rebuild cvstrac-1.1.3-2.1.1.src.rpm
$ su -
# <prefix>/bin/openpkg rpm -Fvh <prefix>/RPM/PKG/cvstrac-1.1.3-2.1.1.*.rpm
Addendum:
Although simply upgrading the affected CVSTrac installation
does remove the vulnerability in question, the existing CVSTrac
configuration should be corrected on the underlying SQLite level as
well. Repeat the following for all project databases:
$ <prefix>/bin/sqlite <prefix>/var/cvstrac/<project>.db
sqlite> select value from config where name="filediff";
rcsdiff -q -r%V1 -r%V2 -u '%F'
sqlite> select value from config where name="filelist";
co -q -p%V '%F' | diff -c /dev/null -
sqlite> .exit
Any commands using version or file replacements (%V, %V1, %V2, %F) but
lacking single quotes (') around them should be corrected:
$ <prefix>/bin/sqlite <prefix>/var/cvstrac/<project>.db
sqlite> update config
...> set value="rcsdiff -q -r'%V1' -r'%V2' -u '%F'"
...> where name="filediff";
sqlite> update config
...> set value="co -q -p '%V' '%F' | diff -c /dev/null -"
...> where name="filelist";
sqlite> .exit
An identical result can be achieved by logging in to the CVSTrac
project pages as the user 'setup'. Select 'Diff Programs' from the
'Setup Menu', and then review both HTML input fields for missing
single quotes as shown.
________________________________________________________________________
References:
[1] http://www.securityfocus.com/archive/1/370955/2004-08-03/2004-08-09/0
[2] http://www.cvstrac.org/
[3] http://www.openpkg.org/tutorial.html#regular-source
[4] http://www.openpkg.org/tutorial.html#regular-binary
[5] ftp://ftp.openpkg.org/release/2.1/UPD/cvstrac-1.1.3-2.1.1.src.rpm
[6] ftp://ftp.openpkg.org/release/2.0/UPD/cvstrac-1.1.2-2.0.1.src.rpm
[7] ftp://ftp.openpkg.org/release/2.1/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 <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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