__________________________________________________________ The U.S. Department of Energy Computer Incident Advisory Capability ___ __ __ _ ___ / | /_\ / \___ __|__ / \ \___ __________________________________________________________ INFORMATION BULLETIN gdm [Debian Security Advisory DSA-1040-1] April 24, 2006 18:00 GMT Number Q-183 [REVISED 2 May 2007] ______________________________________________________________________________ PROBLEM: A vulnerability has been identified in gdm, a display manager for X. PLATFORM: Debian GNU/Linux 3.1 alias sarge Red Hat Desktop (v. 4) Red Hat Enterprise Linux AS, ES, WS (v. 4) DAMAGE: Could allow a local attacker to gain elevated privileges by exploiting a race condition in the handling of the .ICEauthority file. SOLUTION: Upgrade to the appropriate version. ______________________________________________________________________________ VULNERABILITY The risk is MEDIUM. Could allow a local attacker to gain ASSESSMENT: elevated privileges by exploiting a race condition in the handling of the .ICEauthority file. ______________________________________________________________________________ LINKS: CIAC BULLETIN: http://www.ciac.org/ciac/bulletins/q-183.shtml ORIGINAL BULLETIN: Debian Security Advisory DSA-1040-1 http://www.debian.org/security/2006/dsa-1040 ADDITIONAL LINK: https://rhn.redhat.com/errata/RHSA-2007-0286.html CVE: http://www.cve.mitre.org/cgi-bin/cvename.cgi?name= CVE-2006-1057 ______________________________________________________________________________ REVISION HISTORY: 05/02/2007 - revised Q-183 to add a link to Red Hat RHSA-2007:0286-4 for Red Hat Desktop (v. 4), Red Hat Enterprise Linux AS, ES, WS (v. 4). [***** Start Debian Security Advisory DSA-1040-1 *****] Debian Security Advisory DSA-1040-1 gdm -- programming error Date Reported: 24 Apr 2006 Affected Packages: gdm Vulnerable: Yes Security database references: In the Bugtraq database (at SecurityFocus): BugTraq ID 17635. In Mitre's CVE dictionary: CVE-2006-1057. More information: A vulnerability has been identified in gdm, a display manager for X, that could allow a local attacker to gain elevated privileges by exploiting a race condition in the handling of the .ICEauthority file. The old stable distribution (woody) is not affected by this problem. For the stable distribution (sarge) this problem has been fixed in version 2.6.0.8-1sarge2. For the unstable distribution (sid) this problem will be fixed in version 2.14.1-1. We recommend that you upgrade your gdm package. Fixed in: Debian GNU/Linux 3.1 (sarge) Source: http://security.debian.org/pool/updates/main/g/gdm/gdm_2.6.0.8-1sarge2.dsc http://security.debian.org/pool/updates/main/g/gdm/gdm_2.6.0.8-1sarge2.diff.gz http://security.debian.org/pool/updates/main/g/gdm/gdm_2.6.0.8.orig.tar.gz Alpha: http://security.debian.org/pool/updates/main/g/gdm/gdm_2.6.0.8-1sarge2_alpha.deb AMD64: http://security.debian.org/pool/updates/main/g/gdm/gdm_2.6.0.8-1sarge2_amd64.deb ARM: http://security.debian.org/pool/updates/main/g/gdm/gdm_2.6.0.8-1sarge2_arm.deb Intel IA-32: http://security.debian.org/pool/updates/main/g/gdm/gdm_2.6.0.8-1sarge2_i386.deb Intel IA-64: http://security.debian.org/pool/updates/main/g/gdm/gdm_2.6.0.8-1sarge2_ia64.deb HPPA: http://security.debian.org/pool/updates/main/g/gdm/gdm_2.6.0.8-1sarge2_hppa.deb Motorola 680x0: http://security.debian.org/pool/updates/main/g/gdm/gdm_2.6.0.8-1sarge2_m68k.deb Big endian MIPS: http://security.debian.org/pool/updates/main/g/gdm/gdm_2.6.0.8-1sarge2_mips.deb Little endian MIPS: http://security.debian.org/pool/updates/main/g/gdm/gdm_2.6.0.8-1sarge2_mipsel.deb PowerPC: http://security.debian.org/pool/updates/main/g/gdm/gdm_2.6.0.8-1sarge2_powerpc.deb IBM S/390: http://security.debian.org/pool/updates/main/g/gdm/gdm_2.6.0.8-1sarge2_s390.deb Sun Sparc: http://security.debian.org/pool/updates/main/g/gdm/gdm_2.6.0.8-1sarge2_sparc.deb MD5 checksums of the listed files are available in the original advisory. [***** End Debian Security Advisory DSA-1040-1 *****] _______________________________________________________________________________ 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. 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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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