__________________________________________________________ The U.S. Department of Energy Computer Incident Advisory Capability ___ __ __ _ ___ / | /_\ / \___ __|__ / \ \___ __________________________________________________________ INFORMATION BULLETIN Linux CVS Server Heap Overflow Vulnerability [Debian Security Advisory DSA-505-1] May 19, 2004 19:00 GMT Number O-147 ______________________________________________________________________________ PROBLEM: The server that runs the Concurrent Versions System, a version control system that is used to manage source code repositories, contains a heap overflow. PLATFORM: Debian GNU/Linux 3.0 (woody) Red Hat Desktop (v.3) Red Hat Enterprise Linux AS, ES, WS (v.2.1 and v.3) Red Hat Linux Advanced Workstation 2.1 for the Itanium Processor DAMAGE: Malformed "Entry" Lines in combination with Is-modified and Unchanged may be used to overflow memory. SOLUTION: Install the updated packages. ______________________________________________________________________________ VULNERABILITY The risk is HIGH. An attacker with access to a CVS Server could ASSESSMENT: exploit this vulnerability to execute code with the same permissions that the CVS Server is running. ______________________________________________________________________________ LINKS: CIAC BULLETIN: http://www.ciac.org/ciac/bulletins/o-147.shtml ORIGINAL BULLETIN: http://www.debian.org/security/2004/dsa-505 ADDITIONAL LINK: Red Hat Security Advisory RHSA-2004-190-14 https://rhn.redhat.com/errata/RHSA-2004-190.html CVE/CAN: http://www.cve.mitre.org/cgi-bin/cvename.cgi?name= CVE-2004-0396 ______________________________________________________________________________ [***** Start Debian Security Advisory DSA-505-1 *****] Debian Security Advisory DSA-505-1 cvs -- heap overflow Date Reported: 19 May 2004 Affected Packages: cvs Vulnerable: Yes Security database references: In Mitre's CVE dictionary: CAN-2004-0396. More information: Stefan Esser discovered a heap overflow in the CVS server, which serves the popular Concurrent Versions System. Malformed "Entry" Lines in combination with Is-modified and Unchanged can be used to overflow malloc()ed memory. This was prooven to be exploitable. For the stable distribution (woody) this problem has been fixed in version 1.11.1p1debian-9woody4. For the unstable distribution (sid) this problem has been fixed in version 1.12.5-6. We recommend that you upgrade your cvs package immediately. Fixed in: Debian GNU/Linux 3.0 (woody) Source: http://security.debian.org/pool/updates/main/c/cvs/cvs_1.11.1p1debian-9 woody4.dsc http://security.debian.org/pool/updates/main/c/cvs/cvs_1.11.1p1debian-9 woody4.diff.gz http://security.debian.org/pool/updates/main/c/cvs/cvs_1.11.1p1debian. orig.tar.gz Alpha: http://security.debian.org/pool/updates/main/c/cvs/cvs_1.11.1p1debian-9 woody4_alpha.deb ARM: http://security.debian.org/pool/updates/main/c/cvs/cvs_1.11.1p1debian-9 woody4_arm.deb Intel IA-32: http://security.debian.org/pool/updates/main/c/cvs/cvs_1.11.1p1debian-9 woody4_i386.deb Intel IA-64: http://security.debian.org/pool/updates/main/c/cvs/cvs_1.11.1p1debian-9 woody4_ia64.deb HPPA: http://security.debian.org/pool/updates/main/c/cvs/cvs_1.11.1p1debian-9 woody4_hppa.deb Motorola 680x0: http://security.debian.org/pool/updates/main/c/cvs/cvs_1.11.1p1debian-9 woody4_m68k.deb Big endian MIPS: http://security.debian.org/pool/updates/main/c/cvs/cvs_1.11.1p1debian-9 woody4_mips.deb Little endian MIPS: http://security.debian.org/pool/updates/main/c/cvs/cvs_1.11.1p1debian-9 woody4_mipsel.deb PowerPC: http://security.debian.org/pool/updates/main/c/cvs/cvs_1.11.1p1debian-9 woody4_powerpc.deb IBM S/390: http://security.debian.org/pool/updates/main/c/cvs/cvs_1.11.1p1debian-9 woody4_s390.deb Sun Sparc: http://security.debian.org/pool/updates/main/c/cvs/cvs_1.11.1p1debian-9 woody4_sparc.deb MD5 checksums of the listed files are available in the original advisory. [***** End Debian Security Advisory DSA-505-1 *****] _______________________________________________________________________________ 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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