__________________________________________________________ The U.S. Department of Energy Computer Incident Advisory Capability ___ __ __ _ ___ / | /_\ / \___ __|__ / \ \___ __________________________________________________________ INFORMATION BULLETIN kernel-patch-vserver, util-vserver [DSA-1011-1] March 21, 2006 18:00 GMT Number Q-149 ______________________________________________________________________________ PROBLEM: A problem with the default policy of util-vserver may result in unauthorized escapes from a vserver to the host system. PLATFORM: Debian GNU/Linux 3.1 (sarge) DAMAGE: May result in unauthorized escapes from a virtual server to the host system. SOLUTION: Apply current patches. ______________________________________________________________________________ VULNERABILITY The risk is MEDIUM. May result in unauthorized escapes from a ASSESSMENT: virtual server to the host system. ______________________________________________________________________________ LINKS: CIAC BULLETIN: http://www.ciac.org/ciac/bulletins/q-149.shtml ORIGINAL BULLETIN: http://www.debian.org/security/2006/dsa-1011 CVE: http://www.cve.mitre.org/cgi-bin/cvename.cgi?name= CVE-2005-4347, CVE-2005-4418 ______________________________________________________________________________ [***** Start DSA-1011-1 *****] DSA-1011-1 kernel-patch-vserver -- missing attribute support Date Reported: 21 Mar 2005 Affected Packages: kernel-patch-vserver, util-vserver Vulnerable: Yes Security database references: In the Debian bugtracking system: Bug 329087, Bug 329090. In Mitre's CVE dictionary: CVE-2005-4347, CVE-2005-4418. More information: Several vulnerabilities have been discovered in the Debian vserver support for Linux. The Common Vulnerabilities and Exposures project identifies the following problems: * CVE-2005-4347 Bjørn Steinbrink discovered that the chroot barrier is not set correctly with util-vserver which may result in unauthorised escapes from a vserver to the host system. This vulnerability is limited to the 2.4 kernel patch included in kernel-patch-vserver. The correction to this problem requires updating the util-vserver package as well and installing a new kernel built from the updated kernel-patch-vserver package. * CVE-2005-4418 The default policy of util-vserver is set to trust all unknown capabilities instead of considering them as insecure. The old stable distribution (woody) does not contain a kernel-patch-vserver package. For the stable distribution (sarge) this problem has been fixed in version 1.9.5.5 of kernel-patch-vserver and in version 0.30.204-5sarge3 of util-vserver. For the unstable distribution (sid) this problem has been fixed in version 2.3 of kernel-patch-vserver and in version 0.30.208-1 of util-vserver. We recommend that you upgrade your util-vserver and kernel-patch-vserver packages and build a new kernel immediately. Fixed in: Debian GNU/Linux 3.1 (sarge) Source: http://security.debian.org/pool/updates/main/k/kernel-patch-vserver/kernel-patch-vserver_1.9.5.5.dsc http://security.debian.org/pool/updates/main/k/kernel-patch-vserver/kernel-patch-vserver_1.9.5.5.tar.gz http://security.debian.org/pool/updates/main/u/util-vserver/util-vserver_0.30.204-5sarge3.dsc http://security.debian.org/pool/updates/main/u/util-vserver/util-vserver_0.30.204-5sarge3.diff.gz http://security.debian.org/pool/updates/main/u/util-vserver/util-vserver_0.30.204.orig.tar.gz Architecture-independent component: http://security.debian.org/pool/updates/main/k/kernel-patch-vserver/kernel-patch-vserver_1.9.5.5_all.deb Alpha: http://security.debian.org/pool/updates/main/u/util-vserver/util-vserver_0.30.204-5sarge3_alpha.deb AMD64: http://security.debian.org/pool/updates/main/u/util-vserver/util-vserver_0.30.204-5sarge3_amd64.deb Intel IA-32: http://security.debian.org/pool/updates/main/u/util-vserver/util-vserver_0.30.204-5sarge3_i386.deb Intel IA-64: http://security.debian.org/pool/updates/main/u/util-vserver/util-vserver_0.30.204-5sarge3_ia64.deb Big endian MIPS: http://security.debian.org/pool/updates/main/u/util-vserver/util-vserver_0.30.204-5sarge3_mips.deb Little endian MIPS: http://security.debian.org/pool/updates/main/u/util-vserver/util-vserver_0.30.204-5sarge3_mipsel.deb PowerPC: http://security.debian.org/pool/updates/main/u/util-vserver/util-vserver_0.30.204-5sarge3_powerpc.deb IBM S/390: http://security.debian.org/pool/updates/main/u/util-vserver/util-vserver_0.30.204-5sarge3_s390.deb Sun Sparc: http://security.debian.org/pool/updates/main/u/util-vserver/util-vserver_0.30.204-5sarge3_sparc.deb MD5 checksums of the listed files are available in the original advisory. [***** End DSA-1011-1 *****] _______________________________________________________________________________ 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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