__________________________________________________________ The U.S. Department of Energy Computer Incident Advisory Capability ___ __ __ _ ___ / | /_\ / \___ __|__ / \ \___ __________________________________________________________ INFORMATION BULLETIN Debian kernel-patch-2.4.17 Interger Overflow [Debian DSA-433-1] February 4, 2004 21:00 GMT Number O-071 [REVISED 2 Mar 2004] [REVISED 1 Apr 2004] ______________________________________________________________________________ PROBLEM: An integer overflow vulnerability exists in the do_brk() function of the Linux kernel 2.4.17. PLATFORM: Debian GNU/Linux 3.0 (woody) - Linux kernel-patch-2.4.17-mips - Linux kernel-2.4.17-s390 - Linux kernel-2.4.17-hppa DAMAGE: A local user may gain root privileges. SOLUTION: Apply the appropriate Debian patches/upgrades. ______________________________________________________________________________ VULNERABILITY The risk is MEDIUM. A local user could gain root privileges. ASSESSMENT: ______________________________________________________________________________ LINKS: CIAC BULLETIN: http://www.ciac.org/ciac/bulletins/o-071.shtml ORIGINAL BULLETIN: http://www.debian.org/security/2004/dsa-433 http://www.debian.org/security/2004/dsa-442 http://www.debian.org/security/2004/dsa-470 CVE/CAN: http://www.cve.mitre.org/cgi-bin/cvename.cgi?name= CAN-2003-0961 ______________________________________________________________________________ Revision History: 3/2/04 - Added a link to Debian Security Advisory DSA-442-1 for linux-kernel-2.4.17-s390 with a patch to fix the do_brk function vulnerability for this kernel. 4/1/04 - Added a link to Debian Security Advisory DSA-470-1 for linux-kernel-2.4.17-hppa with an upgrade to fix the do_brk function vulnerability for this kernel. [***** Start Debian DSA-433-1 *****] Debian Security Advisory DSA-433-1 kernel-patch-2.4.17-mips -- integer overflow Date Reported: 04 Feb 2004 Affected Packages: kernel-patch-2.4.17-mips Vulnerable: Yes Security database references: In Mitre's CVE dictionary: CAN-2003-0961. More information: RedHat and SuSE kernel and security teams revealed an integer overflow in the do_brk() function of the Linux kernel allows local users to gain root privileges. For the stable distribution (woody) this problem has been fixed in version 2.4.17-0.020226.2.woody4. Other architectures are already or will be fixed separately. For the unstable distribution (sid) this problem will be fixed soon with newly uploaded packages. We recommend that you upgrade your kernel image packages for the mips and mipsel architectures. This problem has been fixed in the upstream version 2.4.23 as well and is also present in 2.4.24, of course. Fixed in: Debian GNU/Linux 3.0 (woody) Source: http://security.debian.org/pool/updates/main/k/kernel-patch-2.4.17-mips /kernel-patch-2.4.17-mips_2.4.17-0.020226.2.woody4.dsc http://security.debian.org/pool/updates/main/k/kernel-patch-2.4.17-mips /kernel-patch-2.4.17-mips_2.4.17-0.020226.2.woody4.tar.gz Architecture-independent component: http://security.debian.org/pool/updates/main/k/kernel-patch-2.4.17-mips /kernel-patch-2.4.17-mips_2.4.17-0.020226.2.woody4_all.deb Big endian MIPS: http://security.debian.org/pool/updates/main/k/kernel-patch-2.4.17-mips /kernel-headers-2.4.17_2.4.17-0.020226.2.woody4_mips.deb http://security.debian.org/pool/updates/main/k/kernel-patch-2.4.17-mips /kernel-image-2.4.17-r4k-ip22_2.4.17-0.020226.2.woody4_mips.deb http://security.debian.org/pool/updates/main/k/kernel-patch-2.4.17-mips /kernel-image-2.4.17-r5k-ip22_2.4.17-0.020226.2.woody4_mips.deb Little endian MIPS: http://security.debian.org/pool/updates/main/k/kernel-patch-2.4.17-mips /kernel-headers-2.4.17_2.4.17-0.020226.2.woody4_mipsel.deb http://security.debian.org/pool/updates/main/k/kernel-patch-2.4.17-mips /kernel-image-2.4.17-r3k-kn02_2.4.17-0.020226.2.woody4_mipsel.deb http://security.debian.org/pool/updates/main/k/kernel-patch-2.4.17-mips /kernel-image-2.4.17-r4k-kn04_2.4.17-0.020226.2.woody4_mipsel.deb http://security.debian.org/pool/updates/main/k/kernel-patch-2.4.17-mips /mips-tools_2.4.17-0.020226.2.woody4_mipsel.deb MD5 checksums of the listed files are available in the original advisory. ----------------------------------------------------------------------------- This page is also available in the following languages: dansk How to set the default document language ----------------------------------------------------------------------------- See the Debian contact page for information on contacting us. Last Modified: Wed, Feb 4 15:04:00 UTC 2004 Copyright © 2004 SPI; See license terms Debian is a registered trademark of Software in the Public Interest, Inc. [***** End Debian DSA-433-1 *****] _______________________________________________________________________________ CIAC wishes to acknowledge the contributions of Debian for the information contained in this bulletin. _______________________________________________________________________________ CIAC, the Computer Incident Advisory Capability, is the computer security incident response team for the U.S. Department of Energy (DOE) and the emergency backup response team for the National Institutes of Health (NIH). CIAC is located at the Lawrence Livermore National Laboratory in Livermore, California. CIAC is also a founding member of FIRST, the Forum of Incident Response and Security Teams, a global organization established to foster cooperation and coordination among computer security teams worldwide. CIAC services are available to DOE, DOE contractors, and the NIH. CIAC can be contacted at: Voice: +1 925-422-8193 (7x24) FAX: +1 925-423-8002 STU-III: +1 925-423-2604 E-mail: ciac@ciac.org Previous CIAC notices, anti-virus software, and other information are available from the CIAC Computer Security Archive. World Wide Web: http://www.ciac.org/ Anonymous FTP: ftp.ciac.org PLEASE NOTE: Many users outside of the DOE, ESnet, and NIH computing communities receive CIAC bulletins. If you are not part of these communities, please contact your agency's response team to report incidents. Your agency's team will coordinate with CIAC. The Forum of Incident Response and Security Teams (FIRST) is a world-wide organization. A list of FIRST member organizations and their constituencies can be obtained via WWW at http://www.first.org/. This document was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor the University of California nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial products, process, or service by trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, recommendation or favoring by the United States Government or the University of California. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or the University of California, and shall not be used for advertising or product endorsement purposes. 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