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Home » Security Advisories» OpenPKG » Proftpd denial of service

Proftpd denial of service

It was reported that ProFTPd version before 1.3.0rc2 suffer from two format string vulnerabilities. In the first, a user with the ability to create a directory could trigger the format string error if there is a ProFTPd shutdown message configured to use the "%C", "%R", or "%U" variables. In the second, the error is triggered if the ProFTPd extension mod_sql is used to retrieve messages from a database and if format strings have been inserted into the database by a user with permission to do so.

  • Vendor: OpenPKG
  • Vendor ID: SA-2005.020
  • Date: September 06, 2005


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________________________________________________________________________

OpenPKG Security Advisory The OpenPKG Project
http://www.openpkg.org/security.html http://www.openpkg.org
[email protected] [email protected]
OpenPKG-SA-2005.020 06-Sep-2005
________________________________________________________________________

Package: proftpd
Vulnerability: denial of service
OpenPKG Specific: no

Affected Releases: Affected Packages: Corrected Packages:
OpenPKG CURRENT <= proftpd-1.3.0rc1-20050610 >= proftpd-1.3.0rc2-20050725
OpenPKG 2.4 <= proftpd-1.3.0rc1-2.4.0 >= proftpd-1.3.0rc1-2.4.1
OpenPKG 2.3 <= proftpd-1.2.10-2.3.1 >= proftpd-1.2.10-2.3.2

Dependent Packages: none

Description:
It was reported that ProFTPd [1] version before 1.3.0rc2 suffer from
two format string vulnerabilities. In the first, a user with the
ability to create a directory could trigger the format string error
if there is a ProFTPd shutdown message configured to use the "%C",
"%R", or "%U" variables. In the second, the error is triggered if the
ProFTPd extension mod_sql is used to retrieve messages from a database
and if format strings have been inserted into the database by a user
with permission to do so. The Common Vulnerabilities and Exposures
(CVE) project assigned the id CAN-2005-2390 [2] to the problem.

Please check whether you are affected by running "/bin/openpkg
rpm -q proftpd". If you have the "proftpd" 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 proftpd-1.3.0rc1-2.4.1.src.rpm
ftp> bye
$ /bin/openpkg rpm -v --checksig proftpd-1.3.0rc1-2.4.1.src.rpm
$ /bin/openpkg rpm --rebuild proftpd-1.3.0rc1-2.4.1.src.rpm
$ su -
# /bin/openpkg rpm -Fvh /RPM/PKG/proftpd-1.3.0rc1-2.4.1.*.rpm
________________________________________________________________________

References:
[1] http://www.proftpd.org/
[2] http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-2390
[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/proftpd-1.3.0rc1-2.4.1.src.rpm
[6] ftp://ftp.openpkg.org/release/2.3/UPD/proftpd-1.2.10-2.3.2.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
________________________________________________________________________

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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