-----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-2003.041 19-Sep-2003 ________________________________________________________________________ Package: sendmail Vulnerability: remote root exploit OpenPKG Specific: no Affected Releases: Affected Packages: Corrected Packages: OpenPKG CURRENT <= sendmail-8.12.9-20030801 >= sendmail-8.12.10-20030917 OpenPKG 1.3 <= sendmail-8.12.9-1.3.0 >= sendmail-8.12.9-1.3.1 OpenPKG 1.2 <= sendmail-8.12.7-1.2.3 >= sendmail-8.12.7-1.2.4 Dependent Packages: none Description: According to a confirmed [1] security advisory from Michal Zalewski [2], a remotely exploitable vulnerability exists in all versions prior to 8.12.10 of the Sendmail [0] MTA. An error in its prescan() function could allow an attacker to write past the end of a buffer, corrupting memory structures. Depending on platform and operating system architecture, the attacker may be able to execute arbitrary code with a specially crafted email message. The email attack vector is message-oriented as opposed to connection-oriented. This means that the vulnerability is triggered by the contents of a specially crafted email message rather than by lower-level network traffic. The Common Vulnerabilities and Exposures (CVE) project assigned the id CAN-2003-0694 [3] to the problem. Additionally, we have included a fix for a potential buffer overflow in Sendmail's ruleset parsing. This problem is not exploitable in the default Sendmail configuration; it is exploitable only if non-standard rulesets recipient (2), final (4), or mailer-specific envelope recipients rulesets are used. The Common Vulnerabilities and Exposures (CVE) project assigned the id CAN-2003-0681 [4] to this problem. Please check whether you are affected by running "<prefix>/bin/rpm -q sendmail". If you have the "sendmail" package installed and its version is affected (see above), we recommend that you immediately upgrade it (see Solution) [5][6] Solution: Select the updated source RPM appropriate for your OpenPKG release [7][8], fetch it from the OpenPKG FTP service [9][10] or a mirror location, verify its integrity [11], build a corresponding binary RPM from it [5] and update your OpenPKG installation by applying the binary RPM [6]. For the current release OpenPKG 1.3, perform the following operations to permanently fix the security problem (for other releases adjust accordingly). $ ftp ftp.openpkg.org ftp> bin ftp> cd release/1.3/UPD ftp> get sendmail-8.12.9-1.3.1.src.rpm ftp> bye $ <prefix>/bin/rpm -v --checksig sendmail-8.12.9-1.3.1.src.rpm $ <prefix>/bin/rpm --rebuild sendmail-8.12.9-1.3.1.src.rpm $ su - # <prefix>/bin/rpm -Fvh <prefix>/RPM/PKG/sendmail-8.12.9-1.3.1.*.rpm ________________________________________________________________________ References: [0] http://www.sendmail.org/ [1] http://www.sendmail.org/8.12.10.html [2] http://www.securityfocus.com/archive/1/337839/2003-09-16/2003-09-22/0 [3] http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0694 [4] http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0681 [5] http://www.openpkg.org/tutorial.html#regular-source [6] http://www.openpkg.org/tutorial.html#regular-binary [7] ftp://ftp.openpkg.org/release/1.2/UPD/sendmail-8.12.7-1.2.4.src.rpm [8] ftp://ftp.openpkg.org/release/1.3/UPD/sendmail-8.12.9-1.3.1.src.rpm [9] ftp://ftp.openpkg.org/release/1.2/UPD/ [10] ftp://ftp.openpkg.org/release/1.3/UPD/ [11] 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> iD4DBQE/arnPgHWT4GPEy58RAsmLAJiH9OqLxetLP4nGrjxpt0+ChXRRAJ9n0IqN c/jaIaEn3EpRDeHv5p5gAQ== =xfNO -----END PGP SIGNATURE-----
