-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ________________________________________________________________________ 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-2004.012 08-Apr-2004 ________________________________________________________________________ Package: fetchmail Vulnerability: denial of service OpenPKG Specific: no Affected Releases: Affected Packages: Corrected Packages: OpenPKG CURRENT <= fetchmail-6.2.4-20031008 >= fetchmail-6.2.5-20031016 OpenPKG 1.3 <= fetchmail-6.2.3-1.3.0 >= fetchmail-6.2.3-1.3.1 OpenPKG 2.0 none N.A. Dependent Packages: none Description: According to a Mandrake Linux security advisory [0], a denial of service (DoS) vulnerability exists in the header rewriting code of Fetchmail [1]. The code's intention is to hack message headers so replies work properly. However, logic in the reply_hack() function fails to allocate enough memory for long lines and may write past a memory boundary. This could allow an attacker to cause a denial of service by sending a specially crafted email and crashing fetchmail. The Common Vulnerabilities and Exposures (CVE) project assigned the id CAN-2003-0792 [2] to the problem. Please check whether you are affected by running "<prefix>/bin/rpm -q fetchmail". If you have the "fetchmail" 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], fetch it from the OpenPKG FTP service [6] or a mirror location, verify its integrity [7], build a corresponding binary RPM from it [3] and update your OpenPKG installation by applying the binary RPM [4]. For the OpenPKG 1.3 release, perform the following operations to permanently fix the security problem. $ ftp ftp.openpkg.org ftp> bin ftp> cd release/1.3/UPD ftp> get fetchmail-6.2.3-1.3.1.src.rpm ftp> bye $ <prefix>/bin/rpm -v --checksig fetchmail-6.2.3-1.3.1.src.rpm $ <prefix>/bin/rpm --rebuild fetchmail-6.2.3-1.3.1.src.rpm $ su - # <prefix>/bin/rpm -Fvh <prefix>/RPM/PKG/fetchmail-6.2.3-1.3.1.*.rpm ________________________________________________________________________ References: [0] http://www.mandrakesecure.net/en/advisories/advisory.php?name=MDKSA-2003:101 [1] http://www.catb.org/~esr/fetchmail/ [2] http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0792 [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/fetchmail-6.2.3-1.3.1.src.rpm [6] ftp://ftp.openpkg.org/release/1.3/UPD/ [7] 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. ________________________________________________________________________ -----BEGIN PGP SIGNATURE----- Comment: OpenPKG <openpkg@openpkg.org> iD8DBQFAdW3RgHWT4GPEy58RAutIAKDLPwHQnlNAhlQmCi1XYEYQryqyCACgn30q IYKyk6HlwUhG0JOiI615w90= =muqI -----END PGP SIGNATURE-----
