__________________________________________________________ The U.S. Department of Energy Computer Incident Advisory Capability ___ __ __ _ ___ / | /_\ / \___ __|__ / \ \___ __________________________________________________________ INFORMATION BULLETIN kernel-source-2.6.8 et.al. [Debian Security Advisory DSA-1111-1] July 18, 2006 12:00 GMT Number Q-248 [REVISED 24 Aug 2006] ______________________________________________________________________________ PROBLEM: It was discovered that a race condition in the process filesystem can lead to privilege escalation. PLATFORM: Debian GNU/Linux 3.1 alias sarge Red Hat Desktop (v.4) Red Hat Enterprise Linux AS, ES, WS (v.4) DAMAGE: A user may gain root privileges. SOLUTION: Upgrade to the appropriate version. ______________________________________________________________________________ VULNERABILITY The risk is MEDIUM. A user may gain root privileges. An exploit ASSESSMENT: is in the wild for this issue. ______________________________________________________________________________ LINKS: CIAC BULLETIN: http://www.ciac.org/ciac/bulletins/q-248.shtml ORIGINAL BULLETIN: Debian Security Advisory DSA-1111-1 http://www.debian.org/security/2006/dsa-1111 ADDITIONAL LINK: Red Hat RHSA-2006:0617-15 https://rhn.redhat.com/errata/RHSA-2006-0617.html CVE: http://www.cve.mitre.org/cgi-bin/cvename.cgi?name= CVE-2006-3626 ______________________________________________________________________________ REVISION HISTORY: 08/24/2006 - revised to add a link to Red Hat RHSA-2006:0617-15 for Red Hat Desktop (v.4) and Enterprise Linux AS, ES, WS (v.4). [***** Start Debian Security Advisory DSA-1111-1 *****] Debian Security Advisory DSA-1111-1 kernel-source-2.6.8 -- race condition Date Reported: Affected Packages: kernel-source-2.6.8 et. al. Vulnerable: Yes Security database references: In Mitre's CVE dictionary: CVE-2006-3626. More information: It was discovered that a race condition in the process filesystem can lead to privilege escalation. The following matrix explains which kernel version for which architecture fixes the problem mentioned above: Debian 3.1 (sarge) Source 2.6.8-16sarge4 Alpha architecture 2.6.8-16sarge4 AMD64 architecture 2.6.8-16sarge4 Intel IA-32 architecture 2.6.8-16sarge4 Intel IA-64 architecture 2.6.8-14sarge4 PowerPC architecture 2.6.8-12sarge4 Sun Sparc architecture 2.6.8-15sarge4 As an exploit for this issue in the wild, this advisory was sent out without builds for the IBM S/390, Motorola 680x0 and HP Precision architectures being available. They will be released in a followup-advisory as soon as they are available. Also, the kernels for the FAI installer haven't been updated yet. As a workaround we recommend to mount proc with the nosuid and noexec options. We recommend that you upgrade your kernel package immediately and reboot the machine. If you have built a custom kernel from the kernel source package, you will need to rebuild to take advantage of these fixes. Fixed in: Debian GNU/Linux 3.1 (sarge) Source: http://security.debian.org/pool/updates/main/k/kernel-image-2.6.8-alpha/kernel -image-2.6.8-alpha_2.6.8-16sarge4.dsc http://security.debian.org/pool/updates/main/k/kernel-image-2.6.8-alpha/kernel -image-2.6.8-alpha_2.6.8-16sarge4.tar.gz http://security.debian.org/pool/updates/main/k/kernel-image-2.6.8-amd64/kernel -image-2.6.8-amd64_2.6.8-16sarge4.dsc http://security.debian.org/pool/updates/main/k/kernel-image-2.6.8-amd64/kernel -image-2.6.8-amd64_2.6.8-16sarge4.tar.gz http://security.debian.org/pool/updates/main/k/kernel-image-2.6.8-ia64/kernel -image-2.6.8-ia64_2.6.8-14sarge4.dsc http://security.debian.org/pool/updates/main/k/kernel-image-2.6.8-ia64/kernel -image-2.6.8-ia64_2.6.8-14sarge4.tar.gz http://security.debian.org/pool/updates/main/k/kernel-image-2.6.8-i386/kernel -image-2.6.8-i386_2.6.8-16sarge4.dsc http://security.debian.org/pool/updates/main/k/kernel-image-2.6.8-i386/kernel -image-2.6.8-i386_2.6.8-16sarge4.tar.gz http://security.debian.org/pool/updates/main/k/kernel-image-2.6.8-sparc/kernel -image-2.6.8-sparc_2.6.8-15sarge4.dsc http://security.debian.org/pool/updates/main/k/kernel-image-2.6.8-sparc/kernel -image-2.6.8-sparc_2.6.8-15sarge4.tar.gz http://security.debian.org/pool/updates/main/k/kernel-source-2.6.8/kernel- source-2.6.8_2.6.8-16sarge4.dsc http://security.debian.org/pool/updates/main/k/kernel-source-2.6.8/kernel- source-2.6.8_2.6.8-16sarge4.diff.gz http://security.debian.org/pool/updates/main/k/kernel-source-2.6.8/kernel- source-2.6.8_2.6.8.orig.tar.gz http://security.debian.org/pool/updates/main/k/kernel-patch-powerpc-2.6.8/ kernel-patch-powerpc-2.6.8_2.6.8-12sarge4.dsc http://security.debian.org/pool/updates/main/k/kernel-patch-powerpc-2.6.8/ kernel-patch-powerpc-2.6.8_2.6.8-12sarge4.tar.gz Architecture-independent component: http://security.debian.org/pool/updates/main/k/kernel-source-2.6.8/kernel- doc-2.6.8_2.6.8-16sarge4_all.deb http://security.debian.org/pool/updates/main/k/kernel-source-2.6.8/kernel- patch-debian-2.6.8_2.6.8-16sarge4_all.deb http://security.debian.org/pool/updates/main/k/kernel-source-2.6.8/kernel- source-2.6.8_2.6.8-16sarge4_all.deb http://security.debian.org/pool/updates/main/k/kernel-source-2.6.8/kernel- tree-2.6.8_2.6.8-16sarge4_all.deb Alpha: http://security.debian.org/pool/updates/main/k/kernel-image-2.6.8-alpha/ kernel-headers-2.6.8-3_2.6.8-16sarge4_alpha.deb http://security.debian.org/pool/updates/main/k/kernel-image-2.6.8-alpha/ kernel-headers-2.6.8-3-generic_2.6.8-16sarge4_alpha.deb http://security.debian.org/pool/updates/main/k/kernel-image-2.6.8-alpha/ kernel-headers-2.6.8-3-smp_2.6.8-16sarge4_alpha.deb http://security.debian.org/pool/updates/main/k/kernel-image-2.6.8-alpha/ kernel-image-2.6.8-3-generic_2.6.8-16sarge4_alpha.deb http://security.debian.org/pool/updates/main/k/kernel-image-2.6.8-alpha/ kernel-image-2.6.8-3-smp_2.6.8-16sarge4_alpha.deb Intel IA-32: http://security.debian.org/pool/updates/main/k/kernel-image-2.6.8-amd64/ kernel-headers-2.6.8-12_2.6.8-16sarge4_i386.deb http://security.debian.org/pool/updates/main/k/kernel-image-2.6.8-amd64/ kernel-headers-2.6.8-12-amd64-generic_2.6.8-16sarge4_i386.deb http://security.debian.org/pool/updates/main/k/kernel-image-2.6.8-amd64/ kernel-headers-2.6.8-12-amd64-k8_2.6.8-16sarge4_i386.deb http://security.debian.org/pool/updates/main/k/kernel-image-2.6.8-amd64/ kernel-headers-2.6.8-12-amd64-k8-smp_2.6.8-16sarge4_i386.deb http://security.debian.org/pool/updates/main/k/kernel-image-2.6.8-amd64/ kernel-headers-2.6.8-12-em64t-p4_2.6.8-16sarge4_i386.deb http://security.debian.org/pool/updates/main/k/kernel-image-2.6.8-amd64/ kernel-headers-2.6.8-12-em64t-p4-smp_2.6.8-16sarge4_i386.deb http://security.debian.org/pool/updates/main/k/kernel-image-2.6.8-amd64/ kernel-image-2.6.8-12-amd64-generic_2.6.8-16sarge4_i386.deb http://security.debian.org/pool/updates/main/k/kernel-image-2.6.8-amd64/ kernel-image-2.6.8-12-amd64-k8_2.6.8-16sarge4_i386.deb http://security.debian.org/pool/updates/main/k/kernel-image-2.6.8-amd64/ kernel-image-2.6.8-12-amd64-k8-smp_2.6.8-16sarge4_i386.deb http://security.debian.org/pool/updates/main/k/kernel-image-2.6.8-amd64/ kernel-image-2.6.8-12-em64t-p4_2.6.8-16sarge4_i386.deb http://security.debian.org/pool/updates/main/k/kernel-image-2.6.8-amd64/ kernel-image-2.6.8-12-em64t-p4-smp_2.6.8-16sarge4_i386.deb http://security.debian.org/pool/updates/main/k/kernel-image-2.6.8-i386/ kernel-headers-2.6.8-3_2.6.8-16sarge4_i386.deb http://security.debian.org/pool/updates/main/k/kernel-image-2.6.8-i386/ kernel-headers-2.6.8-3-386_2.6.8-16sarge4_i386.deb http://security.debian.org/pool/updates/main/k/kernel-image-2.6.8-i386/ kernel-headers-2.6.8-3-686_2.6.8-16sarge4_i386.deb http://security.debian.org/pool/updates/main/k/kernel-image-2.6.8-i386/ kernel-headers-2.6.8-3-686-smp_2.6.8-16sarge4_i386.deb http://security.debian.org/pool/updates/main/k/kernel-image-2.6.8-i386/ kernel-headers-2.6.8-3-k7_2.6.8-16sarge4_i386.deb http://security.debian.org/pool/updates/main/k/kernel-image-2.6.8-i386/ kernel-headers-2.6.8-3-k7-smp_2.6.8-16sarge4_i386.deb http://security.debian.org/pool/updates/main/k/kernel-image-2.6.8-i386/ kernel-image-2.6.8-3-386_2.6.8-16sarge4_i386.deb http://security.debian.org/pool/updates/main/k/kernel-image-2.6.8-i386/ kernel-image-2.6.8-3-686_2.6.8-16sarge4_i386.deb http://security.debian.org/pool/updates/main/k/kernel-image-2.6.8-i386/ kernel-image-2.6.8-3-686-smp_2.6.8-16sarge4_i386.deb http://security.debian.org/pool/updates/main/k/kernel-image-2.6.8-i386/ kernel-image-2.6.8-3-k7_2.6.8-16sarge4_i386.deb http://security.debian.org/pool/updates/main/k/kernel-image-2.6.8-i386/ kernel-image-2.6.8-3-k7-smp_2.6.8-16sarge4_i386.deb Intel IA-64: http://security.debian.org/pool/updates/main/k/kernel-image-2.6.8-ia64/ kernel-headers-2.6-itanium_2.6.8-14sarge4_ia64.deb http://security.debian.org/pool/updates/main/k/kernel-image-2.6.8-ia64/ kernel-headers-2.6-itanium-smp_2.6.8-14sarge4_ia64.deb http://security.debian.org/pool/updates/main/k/kernel-image-2.6.8-ia64/ kernel-headers-2.6-mckinley_2.6.8-14sarge4_ia64.deb http://security.debian.org/pool/updates/main/k/kernel-image-2.6.8-ia64/ kernel-headers-2.6-mckinley-smp_2.6.8-14sarge4_ia64.deb http://security.debian.org/pool/updates/main/k/kernel-image-2.6.8-ia64/ kernel-headers-2.6.8-3_2.6.8-14sarge4_ia64.deb http://security.debian.org/pool/updates/main/k/kernel-image-2.6.8-ia64/ kernel-headers-2.6.8-3-itanium_2.6.8-14sarge4_ia64.deb http://security.debian.org/pool/updates/main/k/kernel-image-2.6.8-ia64/ kernel-headers-2.6.8-3-itanium-smp_2.6.8-14sarge4_ia64.deb http://security.debian.org/pool/updates/main/k/kernel-image-2.6.8-ia64/ kernel-headers-2.6.8-3-mckinley_2.6.8-14sarge4_ia64.deb http://security.debian.org/pool/updates/main/k/kernel-image-2.6.8-ia64/ kernel-headers-2.6.8-3-mckinley-smp_2.6.8-14sarge4_ia64.deb http://security.debian.org/pool/updates/main/k/kernel-image-2.6.8-ia64/ kernel-image-2.6-itanium_2.6.8-14sarge4_ia64.deb http://security.debian.org/pool/updates/main/k/kernel-image-2.6.8-ia64/ kernel-image-2.6-itanium-smp_2.6.8-14sarge4_ia64.deb http://security.debian.org/pool/updates/main/k/kernel-image-2.6.8-ia64/ kernel-image-2.6-mckinley_2.6.8-14sarge4_ia64.deb http://security.debian.org/pool/updates/main/k/kernel-image-2.6.8-ia64/ kernel-image-2.6-mckinley-smp_2.6.8-14sarge4_ia64.deb http://security.debian.org/pool/updates/main/k/kernel-image-2.6.8-ia64/ kernel-image-2.6.8-3-itanium_2.6.8-14sarge4_ia64.deb http://security.debian.org/pool/updates/main/k/kernel-image-2.6.8-ia64/ kernel-image-2.6.8-3-itanium-smp_2.6.8-14sarge4_ia64.deb http://security.debian.org/pool/updates/main/k/kernel-image-2.6.8-ia64/ kernel-image-2.6.8-3-mckinley_2.6.8-14sarge4_ia64.deb http://security.debian.org/pool/updates/main/k/kernel-image-2.6.8-ia64/ kernel-image-2.6.8-3-mckinley-smp_2.6.8-14sarge4_ia64.deb Sun Sparc: http://security.debian.org/pool/updates/main/k/kernel-image-2.6.8-sparc/ kernel-build-2.6.8-3_2.6.8-15sarge4_sparc.deb http://security.debian.org/pool/updates/main/k/kernel-image-2.6.8-sparc/ kernel-headers-2.6.8-3_2.6.8-15sarge4_sparc.deb http://security.debian.org/pool/updates/main/k/kernel-image-2.6.8-sparc/ kernel-headers-2.6.8-3-sparc32_2.6.8-15sarge4_sparc.deb http://security.debian.org/pool/updates/main/k/kernel-image-2.6.8-sparc/ kernel-headers-2.6.8-3-sparc64_2.6.8-15sarge4_sparc.deb http://security.debian.org/pool/updates/main/k/kernel-image-2.6.8-sparc/ kernel-headers-2.6.8-3-sparc64-smp_2.6.8-15sarge4_sparc.deb http://security.debian.org/pool/updates/main/k/kernel-image-2.6.8-sparc/ kernel-image-2.6.8-3-sparc32_2.6.8-15sarge4_sparc.deb http://security.debian.org/pool/updates/main/k/kernel-image-2.6.8-sparc/ kernel-image-2.6.8-3-sparc64_2.6.8-15sarge4_sparc.deb http://security.debian.org/pool/updates/main/k/kernel-image-2.6.8-sparc/ kernel-image-2.6.8-3-sparc64-smp_2.6.8-15sarge4_sparc.deb PowerPC: http://security.debian.org/pool/updates/main/k/kernel-patch-powerpc-2.6.8/ kernel-build-2.6.8-3-power3_2.6.8-12sarge4_powerpc.deb http://security.debian.org/pool/updates/main/k/kernel-patch-powerpc-2.6.8/ kernel-build-2.6.8-3-power3-smp_2.6.8-12sarge4_powerpc.deb http://security.debian.org/pool/updates/main/k/kernel-patch-powerpc-2.6.8/ kernel-build-2.6.8-3-power4_2.6.8-12sarge4_powerpc.deb http://security.debian.org/pool/updates/main/k/kernel-patch-powerpc-2.6.8/ kernel-build-2.6.8-3-power4-smp_2.6.8-12sarge4_powerpc.deb http://security.debian.org/pool/updates/main/k/kernel-patch-powerpc-2.6.8/ kernel-build-2.6.8-3-powerpc_2.6.8-12sarge4_powerpc.deb http://security.debian.org/pool/updates/main/k/kernel-patch-powerpc-2.6.8/ kernel-build-2.6.8-3-powerpc-smp_2.6.8-12sarge4_powerpc.deb http://security.debian.org/pool/updates/main/k/kernel-patch-powerpc-2.6.8/ kernel-headers-2.6.8-3_2.6.8-12sarge4_powerpc.deb http://security.debian.org/pool/updates/main/k/kernel-patch-powerpc-2.6.8/ kernel-image-2.6.8-3-power3_2.6.8-12sarge4_powerpc.deb http://security.debian.org/pool/updates/main/k/kernel-patch-powerpc-2.6.8/ kernel-image-2.6.8-3-power3-smp_2.6.8-12sarge4_powerpc.deb http://security.debian.org/pool/updates/main/k/kernel-patch-powerpc-2.6.8/ kernel-image-2.6.8-3-power4_2.6.8-12sarge4_powerpc.deb http://security.debian.org/pool/updates/main/k/kernel-patch-powerpc-2.6.8/ kernel-image-2.6.8-3-power4-smp_2.6.8-12sarge4_powerpc.deb http://security.debian.org/pool/updates/main/k/kernel-patch-powerpc-2.6.8/ kernel-image-2.6.8-3-powerpc_2.6.8-12sarge4_powerpc.deb http://security.debian.org/pool/updates/main/k/kernel-patch-powerpc-2.6.8/ kernel-image-2.6.8-3-powerpc-smp_2.6.8-12sarge4_powerpc.deb MD5 checksums of the listed files are available in the original advisory. [***** End Debian Security Advisory DSA-1111-1 *****] _______________________________________________________________________________ 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. LAST 10 CIAC BULLETINS ISSUED (Previous bulletins available from CIAC) Q-238: Kernel Security Update Q-239: ppp Programming Error Q-240: Vulnerability in Server Service Q-241: Vulnerability in Microsoft Internet Information Services using Active Server Pages Q-242: Vulnerabilities in Microsoft Excel Q-243: Vulnerabilities in Microsoft Office Q-244: Vulnerabilities in Microsoft Office Filters Q-245: Multiple Cisco Unified CallManager Vulnerabilities Q-246: Cisco Router Web Setup Ships with Insecure Default IOS Configuration Q-247: vixie-cron Security Update