From openpkg@openpkg.org Thu Aug 28 15:30:30 2003 From: OpenPKG To: full-disclosure@lists.netsys.com Date: Thu, 28 Aug 2003 10:41:15 +0200 Subject: [Full-Disclosure] [OpenPKG-SA-2003.037] OpenPKG Security Advisory (sendmail) -----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-2003.037 28-Aug-2003 ________________________________________________________________________ Package: sendmail Vulnerability: Denial of Service OpenPKG Specific: no Affected Releases: Affected Packages: Corrected Packages: OpenPKG CURRENT none N.A. OpenPKG 1.3 none N.A. OpenPKG 1.2 <= sendmail-8.12.7-1.2.2 >= sendmail-8.12.7-1.2.3 Dependent Packages: none Description: Oleg Bulyzhin reported to FreeBSD [1] a confirmed [2] Denial of Service (DoS) vulnerability in all version of the Sendmail MTA [0] earlier than 8.12.9. Due to a wrong initialization of an internal structure, if Sendmail gets a bad DNS reply (with actual reply size not equal the announced reply size), it later calls free() on a random address. This usually cause Sendmail to crash. Please check whether you are affected by running "/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). [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 affected release OpenPKG 1.2, perform the following operations to permanently fix the security problem (for other releases adjust accordingly). $ ftp ftp.openpkg.org ftp> bin ftp> cd release/1.2/UPD ftp> get sendmail-8.12.7-1.2.3.src.rpm ftp> bye $ /bin/rpm -v --checksig sendmail-8.12.7-1.2.3.src.rpm $ /bin/rpm --rebuild sendmail-8.12.7-1.2.3.src.rpm $ su - # /bin/rpm -Fvh /RPM/PKG/sendmail-8.12.7-1.2.3.*.rpm ________________________________________________________________________ References: [0] http://www.sendmail.org/ [1] http://www.freebsd.org/cgi/query-pr.cgi?pr=bin/54367 [2] http://www.sendmail.org/dnsmap1.html [3] http://www.openpkg.org/tutorial.html#regular-source [4] http://www.openpkg.org/tutorial.html#regular-binary [5] ftp://ftp.openpkg.org/release/1.2/UPD/sendmail-8.12.7-1.2.3.src.rpm [6] ftp://ftp.openpkg.org/release/1.2/UPD/ [7] 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. ________________________________________________________________________ -----BEGIN PGP SIGNATURE----- Comment: OpenPKG iD8DBQE/Tb+ZgHWT4GPEy58RAsYCAJ9ZCxyvh1cHAc3yodParNpttFQlCQCg3Esl aNgXgF5F2UNtdcjd8JUblII= =Yd9K -----END PGP SIGNATURE----- _______________________________________________ Full-Disclosure - We believe in it. Charter: http://lists.netsys.com/full-disclosure-charter.html