From owner-freebsd-security-notifications@FreeBSD.ORG Wed May 26 04:33:37 2004 Return-Path: Delivered-To: freebsd-security-notifications@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 868FA16A4CF; Wed, 26 May 2004 04:33:37 -0700 (PDT) Received: from smtp.des.no (flood.des.no [217.116.83.31]) by mx1.FreeBSD.org (Postfix) with ESMTP id A251A43D2D; Wed, 26 May 2004 04:33:36 -0700 (PDT) (envelope-from security-advisories@freebsd.org) Received: by smtp.des.no (Pony Express, from userid 666) id D9F465311; Wed, 26 May 2004 13:33:26 +0200 (CEST) Received: from dwp.des.no (des.no [80.203.228.37]) by smtp.des.no (Pony Express) with ESMTP id A3A75530E; Wed, 26 May 2004 13:32:52 +0200 (CEST) Received: by dwp.des.no (Postfix, from userid 2602) id EADF633CB0; Wed, 26 May 2004 13:32:51 +0200 (CEST) From: FreeBSD Security Advisories To: FreeBSD Security Advisories Precedence: bulk Message-Id: <20040526113251.EADF633CB0@dwp.des.no> Date: Wed, 26 May 2004 13:32:51 +0200 (CEST) X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on flood.des.no X-Spam-Level: s X-Spam-Status: No, hits=1.8 required=5.0 tests=ADDR_FREE autolearn=no version=2.63 Subject: FreeBSD Security Advisory FreeBSD-SA-04:11.msync X-BeenThere: freebsd-security-notifications@freebsd.org X-Mailman-Version: 2.1.1 Reply-To: security-advisories@freebsd.org List-Id: Moderated Security Notifications [moderated, low volume] List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 26 May 2004 11:33:37 -0000 -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ============================================================================= FreeBSD-SA-04:11.msync Security Advisory The FreeBSD Project Topic: buffer cache invalidation implementation issues Category: core Module: sys Announced: 2004-05-26 Credits: Stephan Uphoff Matt Dillon Affects: All FreeBSD versions prior to the correction date Corrected: 2004-05-25 22:46:38 UTC (RELENG_4, 4.10-STABLE) 2004-05-25 23:07:55 UTC (RELENG_5_2, 5.2.1-RELEASE-p8) 2004-05-22 23:09:19 UTC (RELENG_4_10, 4.10-RELEASE) 2004-05-25 23:01:21 UTC (RELENG_4_9, 4.9-RELEASE-p9) 2004-05-25 23:01:19 UTC (RELENG_4_8, 4.8-RELEASE-p22) CVE Name: CAN-2004-0435 FreeBSD only: YES For general information regarding FreeBSD Security Advisories, including descriptions of the fields above, security branches, and the following sections, please visit . I. Background The msync(2) system call is used by applications to request that modified memory pages are written to permanent storage. II. Problem Description Programming errors in the implementation of the msync(2) system call involving the MS_INVALIDATE operation lead to cache consistency problems between the virtual memory system and on-disk contents. III. Impact In some situations, a user with read access to a file may be able to prevent changes to that file from being committed to disk. IV. Workaround There is no workaround. V. Solution Perform one of the following: 1) Upgrade your vulnerable system to 4-STABLE; or to the RELENG_5_2, RELENG_4_10, RELENG_4_9, or RELENG_4_8 security branch dated after the correction date. 2) To patch your present system: The following patches have been verified to apply to FreeBSD 4.8, 4.9, 4.10 and 5.2 systems. a) Download the relevant patch from the location below, and verify the detached PGP signature using your PGP utility. [FreeBSD 5.2] # fetch ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-04:11/msync5.patch # fetch ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-04:11/msync5.patch.asc [FreeBSD 4.8, 4.9, 4.10] # fetch ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-04:11/msync4.patch # fetch ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-04:11/msync4.patch.asc b) Apply the patch. # cd /usr/src # patch < /path/to/patch c) Recompile your kernel as described in and reboot the system. VI. Correction details The following list contains the revision numbers of each file that was corrected in FreeBSD. Branch Revision Path - ------------------------------------------------------------------------- RELENG_4 src/sys/ufs/ufs/ufs_readwrite.c 1.65.2.16 src/sys/vm/vm_map.c 1.187.2.30 RELENG_4_10 src/sys/ufs/ufs/ufs_readwrite.c 1.65.2.14.4.1 src/sys/vm/vm_map.c 1.187.2.24.2.4 RELENG_4_9 src/UPDATING 1.73.2.89.2.10 src/sys/conf/newvers.sh 1.44.2.32.2.10 src/sys/ufs/ufs/ufs_readwrite.c 1.65.2.14.2.1 src/sys/vm/vm_map.c 1.187.2.23.2.1 RELENG_4_8 src/UPDATING 1.73.2.80.2.25 src/sys/conf/newvers.sh 1.44.2.29.2.23 src/sys/ufs/ufs/ufs_readwrite.c 1.65.2.13.2.1 src/sys/vm/vm_map.c 1.187.2.17.2.1 RELENG_5_2 src/UPDATING 1.282.2.16 src/sys/conf/newvers.sh 1.56.2.15 src/sys/ufs/ffs/ffs_vnops.c 1.119.2.1 src/sys/vm/vm_object.c 1.317.2.1 - ------------------------------------------------------------------------- -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.4 (FreeBSD) iD8DBQFAtH2pFdaIBMps37IRAmycAJ0cv/iG6NlGBsC1xT4gg/Gx3lF8DwCghfHl G2wdUNyfvhz0u3kFB9pH41c= =SK1u -----END PGP SIGNATURE-----