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Immunix alert IMNX-2003-7+-021-01 (sendmail)

From:  Immunix Security Team <>
Subject:  Immunix Secured OS 7+ sendmail update
Date:  Wed, 17 Sep 2003 20:51:31 -0700

[From the Redundancy Department of Redundancy: When setting up an out-of-office-autoreply, please configure it to NOT respond to Precedence: bulk mail or other public mail lists. Thanks.] ----------------------------------------------------------------------- Immunix Secured OS Security Advisory Packages updated: sendmail Affected products: Immunix OS 7+ Bugs fixed: CAN-2003-0681, CAN-2003-0694 Date: Wed Sep 17 2003 Advisory ID: IMNX-2003-7+-021-01 Author: Seth Arnold <> ----------------------------------------------------------------------- Description: Michal Zalewski discovered flaws in sendmail's prescan() function. prescan() is used sufficiently frequently in the sendmail sources that it is not clear where the overflowed buffers are located in memory, thus administrators should assume that StackGuard provides limited coverage at best. This flaw is CAN-2003-0694. Timo Sirainen has discovered CAN-2003-0681, "a potential buffer overflow in ruleset parsing which is not exploitable in the default sendmail configuration; only if non-standard rulesets recipient (2), final (4), or mailer-specific envelope recipients rulesets are used then a problem may occur." Immunix would like to thank Claus Assmann, Ademar de Souza Reis Jr, and Todd C. Miller. Package names and locations: Precompiled binary packages for Immunix 7+ are available at: A source package for Immunix 7+ is located here: Immunix OS 7+ md5sums: cf0da9af59b3ce5ef3415ef165ed5acf RPMS/sendmail-8.11.6-3_imnx_6.i386.rpm d7e44a404f9208d5d5e831146ebee81f RPMS/sendmail-cf-8.11.6-3_imnx_6.i386.rpm 580f5f35079dff0d523c79b8f903add0 RPMS/sendmail-doc-8.11.6-3_imnx_6.i386.rpm 3811d5cb46c9309ec7ebf894b4fb709e SRPMS/sendmail-8.11.6-3_imnx_6.src.rpm GPG verification: Our public keys are available at Immunix, Inc., has changed policy with GPG keys. We maintain several keys now: C53B2B53 for Immunix 7+ package signing, D3BA6C17 for Immunix 7.3 package signing, and 1B7456DA for general security issues. NOTE: Ibiblio is graciously mirroring our updates, so if the links above are slow, please try: or one of the many mirrors available at: ImmunixOS 6.2 is no longer officially supported. ImmunixOS 7.0 is no longer officially supported. Contact information: To report vulnerabilities, please contact Immunix attempts to conform to the RFP vulnerability disclosure protocol

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