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__________________________________________________________ The U.S. Department of Energy Computer Incident Advisory Capability ___ __ __ _ ___ / | /_\ / \___ __|__ / \ \___ __________________________________________________________ INFORMATION BULLETIN Red Hat Updated 2.4 Kernel Fix for ptrace Vulnerability [RHSA-2003:098-24] March 18, 2003 14:00 GMT Number N-056 [Revised 02 June 2003] ______________________________________________________________________________ PROBLEM: The Linux kernel handles the basic functions of the operating system. A vulnerability has been found in version 2.4.18 of the kernel. These packages fix a ptrace-related vulnerability that can lead to elevated (root) privileges. PLATFORM: Red Hat Linux 7.1 Red Hat Linux 7.2 Red Hat Linux 7.3 Red Hat Linux 8.0 DAMAGE: If exploited, a local user could gain root access. SOLUTION: Apply updated packages as stated in Red Hat's advisory. ______________________________________________________________________________ VULNERABILITY The risk is MEDIUM. This vulnerability allows local users to ASSESSMENT: gain root privileges by using ptrace to attach to a child process that is spawned by the kernel. ______________________________________________________________________________ LINKS: CIAC BULLETIN: http://www.ciac.org/ciac/bulletins/n-056.shtml ORIGINAL BULLETIN: https://rhn.redhat.com/errata/RHSA-2003-098.html ______________________________________________________________________________ Revision History: Updated kernel packages for Red Hat Linux 7.1, 7.2, 7.3, and 8.0 are now available. [***** Start RHSA-2003:098-24 *****] Updated 2.4 kernel fixes vulnerability Advisory: RHSA-2003:098-24 Last updated on: 2003-06-02 Affected Products: Red Hat Linux 7.1 Red Hat Linux 7.2 Red Hat Linux 7.3 Red Hat Linux 8.0 CVEs (cve.mitre.org): CAN-2003-0127 Security Advisory Details: Updated kernel packages for Red Hat Linux 7.1, 7.2, 7.3, and 8.0 are now available. These packages fix a ptrace-related vulnerability that can lead to elevated (root) privileges. [Updated 30 March 2003] Updated kernel packages for Red Hat Linux 7.2 ia64 have been added. [Updated 28 May 2003] Replacement kernel packages for Red Hat Linux 7.2 ia64 have been added; the previous packages did not contain the fix for the ptrace vulnerability. The Linux kernel handles the basic functions of the operating system. A vulnerability has been found in version 2.4.18 of the kernel. This vulnerability makes it possible for local users to gain elevated (root) privileges without authorization. This advisory includes updates for Red Hat Linux 7.1, 7.2, 7.3, and 8.0. All users of Red Hat Linux 7.1, 7.2, 7.3, and 8.0 should upgrade to these errata packages, which contain patches to fix the vulnerability. Updated packages: Red Hat Linux 7.1 -------------------------------------------------------------------------------- SRPMS: kernel-2.4.18-27.7.x.src.rpm File outdated by: RHSA-2003:187 addeef535e3590c9c080661b6747c3a8 athlon: kernel-2.4.18-27.7.x.athlon.rpm File outdated by: RHSA-2003:187 f604974008bc2f85ddb83edcbd137f08 kernel-smp-2.4.18-27.7.x.athlon.rpm File outdated by: RHSA-2003:187 87298e818938d0db069030f2737a83c1 i386: kernel-2.4.18-27.7.x.i386.rpm File outdated by: RHSA-2003:187 d8d7ad334e192989308399924cbf91f8 kernel-BOOT-2.4.18-27.7.x.i386.rpm File outdated by: RHSA-2003:187 2060403022a1dc25a5700356d2d6b649 kernel-doc-2.4.18-27.7.x.i386.rpm File outdated by: RHSA-2003:187 02ae46618c1b001874e1330ad57f54fa kernel-source-2.4.18-27.7.x.i386.rpm File outdated by: RHSA-2003:187 b169f55fef2064ef29c753674aaba9b0 i586: kernel-2.4.18-27.7.x.i586.rpm File outdated by: RHSA-2003:187 5a970002916eebe2e6665fbbf0a44109 kernel-smp-2.4.18-27.7.x.i586.rpm File outdated by: RHSA-2003:187 b3fb5228466e86dfb9287c32b89b8118 i686: kernel-2.4.18-27.7.x.i686.rpm File outdated by: RHSA-2003:187 cab59b8ce75e659243340b811a0e59ad kernel-bigmem-2.4.18-27.7.x.i686.rpm File outdated by: RHSA-2003:187 5ceca1d559294ba1dee9dcf807a0e442 kernel-debug-2.4.18-27.7.x.i686.rpm [ via FTP ] [ via HTTP ] 007688dc1826fee8abaff646ea77cedc kernel-smp-2.4.18-27.7.x.i686.rpm File outdated by: RHSA-2003:187 53187f3f166aa6e5a500b106d6bff69c Red Hat Linux 7.2 -------------------------------------------------------------------------------- SRPMS: kernel-2.4.18-27.7.x.src.rpm File outdated by: RHSA-2003:187 addeef535e3590c9c080661b6747c3a8 kernel-2.4.9-45.src.rpm [ via FTP ] [ via HTTP ] f02b540d039656fd187f978cbd5019a5 athlon: kernel-2.4.18-27.7.x.athlon.rpm File outdated by: RHSA-2003:187 f604974008bc2f85ddb83edcbd137f08 kernel-smp-2.4.18-27.7.x.athlon.rpm File outdated by: RHSA-2003:187 87298e818938d0db069030f2737a83c1 i386: kernel-2.4.18-27.7.x.i386.rpm File outdated by: RHSA-2003:187 d8d7ad334e192989308399924cbf91f8 kernel-BOOT-2.4.18-27.7.x.i386.rpm File outdated by: RHSA-2003:187 2060403022a1dc25a5700356d2d6b649 kernel-doc-2.4.18-27.7.x.i386.rpm File outdated by: RHSA-2003:187 02ae46618c1b001874e1330ad57f54fa kernel-source-2.4.18-27.7.x.i386.rpm File outdated by: RHSA-2003:187 b169f55fef2064ef29c753674aaba9b0 i586: kernel-2.4.18-27.7.x.i586.rpm File outdated by: RHSA-2003:187 5a970002916eebe2e6665fbbf0a44109 kernel-smp-2.4.18-27.7.x.i586.rpm File outdated by: RHSA-2003:187 b3fb5228466e86dfb9287c32b89b8118 i686: kernel-2.4.18-27.7.x.i686.rpm File outdated by: RHSA-2003:187 cab59b8ce75e659243340b811a0e59ad kernel-bigmem-2.4.18-27.7.x.i686.rpm File outdated by: RHSA-2003:187 5ceca1d559294ba1dee9dcf807a0e442 kernel-debug-2.4.18-27.7.x.i686.rpm [ via FTP ] [ via HTTP ] 007688dc1826fee8abaff646ea77cedc kernel-smp-2.4.18-27.7.x.i686.rpm File outdated by: RHSA-2003:187 53187f3f166aa6e5a500b106d6bff69c ia64: kernel-2.4.9-45.ia64.rpm [ via FTP ] [ via HTTP ] 1d1a5f8df83abfe997ce85d157c65ff1 kernel-doc-2.4.9-45.ia64.rpm [ via FTP ] [ via HTTP ] 1dd2a98bcf0c020545d4a79bdf1718ab kernel-smp-2.4.9-45.ia64.rpm [ via FTP ] [ via HTTP ] a0606de442a7ffbfc1fca2191e3dab5d kernel-source-2.4.9-45.ia64.rpm [ via FTP ] [ via HTTP ] b51b363b46abc1f3d530902a2583f9f2 Red Hat Linux 7.3 -------------------------------------------------------------------------------- SRPMS: kernel-2.4.18-27.7.x.src.rpm File outdated by: RHSA-2003:187 addeef535e3590c9c080661b6747c3a8 athlon: kernel-2.4.18-27.7.x.athlon.rpm File outdated by: RHSA-2003:187 f604974008bc2f85ddb83edcbd137f08 kernel-smp-2.4.18-27.7.x.athlon.rpm File outdated by: RHSA-2003:187 87298e818938d0db069030f2737a83c1 i386: kernel-2.4.18-27.7.x.i386.rpm File outdated by: RHSA-2003:187 d8d7ad334e192989308399924cbf91f8 kernel-BOOT-2.4.18-27.7.x.i386.rpm File outdated by: RHSA-2003:187 2060403022a1dc25a5700356d2d6b649 kernel-doc-2.4.18-27.7.x.i386.rpm File outdated by: RHSA-2003:187 02ae46618c1b001874e1330ad57f54fa kernel-source-2.4.18-27.7.x.i386.rpm File outdated by: RHSA-2003:187 b169f55fef2064ef29c753674aaba9b0 i586: kernel-2.4.18-27.7.x.i586.rpm File outdated by: RHSA-2003:187 5a970002916eebe2e6665fbbf0a44109 kernel-smp-2.4.18-27.7.x.i586.rpm File outdated by: RHSA-2003:187 b3fb5228466e86dfb9287c32b89b8118 i686: kernel-2.4.18-27.7.x.i686.rpm File outdated by: RHSA-2003:187 cab59b8ce75e659243340b811a0e59ad kernel-bigmem-2.4.18-27.7.x.i686.rpm File outdated by: RHSA-2003:187 5ceca1d559294ba1dee9dcf807a0e442 kernel-debug-2.4.18-27.7.x.i686.rpm [ via FTP ] [ via HTTP ] 007688dc1826fee8abaff646ea77cedc kernel-smp-2.4.18-27.7.x.i686.rpm File outdated by: RHSA-2003:187 53187f3f166aa6e5a500b106d6bff69c Red Hat Linux 8.0 -------------------------------------------------------------------------------- SRPMS: kernel-2.4.18-27.8.0.src.rpm File outdated by: RHSA-2003:187 1eca60a3b18951dc74a0d4e59eafea69 athlon: kernel-2.4.18-27.8.0.athlon.rpm File outdated by: RHSA-2003:187 097df4f27af2703a8332d136b6a87db4 kernel-smp-2.4.18-27.8.0.athlon.rpm File outdated by: RHSA-2003:187 5ecb81df3091f5fec327d789643b973d i386: kernel-2.4.18-27.8.0.i386.rpm File outdated by: RHSA-2003:187 05152635e760b2f15b21e343da99ddf4 kernel-BOOT-2.4.18-27.8.0.i386.rpm File outdated by: RHSA-2003:187 2c737942e4ea911d58b87fcc5a22eece kernel-doc-2.4.18-27.8.0.i386.rpm File outdated by: RHSA-2003:187 0d45350f1bc10a45698ca517b2683869 kernel-source-2.4.18-27.8.0.i386.rpm File outdated by: RHSA-2003:187 6db233f9749ca25b3fff2073aa0afaea i586: kernel-2.4.18-27.8.0.i586.rpm File outdated by: RHSA-2003:187 c6f8aba34d85c7447ab4c2c1ab90e7f2 kernel-smp-2.4.18-27.8.0.i586.rpm File outdated by: RHSA-2003:187 80d3cff38bd8d535bbe239a5958730af i686: kernel-2.4.18-27.8.0.i686.rpm File outdated by: RHSA-2003:187 4c0fc846e4faeab3e2e1b966aa65d945 kernel-bigmem-2.4.18-27.8.0.i686.rpm File outdated by: RHSA-2003:187 d138caa438cc87fc6835da69626a1602 kernel-debug-2.4.18-27.8.0.i686.rpm [ via FTP ] [ via HTTP ] ad41c60b306912c33a4b050511eec08c kernel-smp-2.4.18-27.8.0.i686.rpm File outdated by: RHSA-2003:187 c5e17489cee52cd526ebac66604a22ba Solution Before applying this update, make sure all previously released errata relevant to your system have been applied, especially the additional packages from RHSA-2002:205 and RHSA-2002:206. The procedure for upgrading the kernel manually is documented at: http://www.redhat.com/support/docs/howto/kernel-upgrade/ Please read the directions for your architecture carefully before proceeding with the kernel upgrade. Please note that this update is also available via Red Hat Network. Many people find this to be an easier way to apply updates. To use Red Hat Network, launch the Red Hat Update Agent with the following command: up2date This will start an interactive process that will result in the appropriate RPMs being upgraded on your system. Note that you need to select the kernel explicitly on default configurations of up2date. References: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0127 Keywords: ptrace -------------------------------------------------------------------------------- The listed packages are GPG signed by Red Hat, Inc. for security. Our key is available at: http://www.redhat.com/solutions/security/news/publickey/#key You can verify each package and see who signed it with the following command: rpm --checksig -v filename If you only wish to verify that each package has not been corrupted or tampered with, examine only the md5sum with the following command: md5sum filename The Red Hat security contact is security@redhat.com. More contact details at http://www.redhat.com/solutions/security/news/contact.html [***** End RHSA-2003:098-24 *****] _______________________________________________________________________________ CIAC wishes to acknowledge the contributions of Red Hat Inc. 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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