__________________________________________________________ The U.S. Department of Energy Computer Incident Advisory Capability ___ __ __ _ ___ / | /_\ / \___ __|__ / \ \___ __________________________________________________________ INFORMATION BULLETIN ncompress [Debian Security Advisory DSA-1149-1] August 10, 2006 17:00 GMT Number Q-285 ______________________________________________________________________________ PROBLEM: There is a missing boundary check in ncompress, the original Lempel-Ziv compress and uncompress programs. PLATFORM: Debian GNU/Linux 3.1 alias sarge DAMAGE: Allows a specially crafted datastream to underflow a buffer with attacker controlled data. SOLUTION: Upgrade to the appropriate version. ______________________________________________________________________________ VULNERABILITY The risk is MEDIUM. Allows a specially crafted datastream to ASSESSMENT: underflow a buffer with attacker controlled data. ______________________________________________________________________________ LINKS: CIAC BULLETIN: http://www.ciac.org/ciac/bulletins/q-285.shtml ORIGINAL BULLETIN: Debian Security Advisory DSA-1149-1 http://www.debian.org/security/2006/dsa-1149 CVE: http://www.cve.mitre.org/cgi-bin/cvename.cgi?name= CVE-2006-1168 ______________________________________________________________________________ [***** Start Debian Security Advisory DSA-1149-1 *****] Debian Security Advisory DSA-1149-1 ncompress -- buffer underflow Date Reported: 10 Aug 2006 Affected Packages: ncompress Vulnerable: Yes Security database references: In Mitre's CVE dictionary: CVE-2006-1168. More information: Tavis Ormandy from the Google Security Team discovered a missing boundary check in ncompress, the original Lempel-Ziv compress and uncompress programs, which allows a specially crafted datastream to underflow a buffer with attacker controlled data. For the stable distribution (sarge) this problem has been fixed in version 4.2.4-15sarge2. For the unstable distribution (sid) this problem has been fixed in version 4.2.4-15sarge2. We recommend that you upgrade your ncompress package. Fixed in: Debian GNU/Linux 3.1 (sarge) Source: http://security.debian.org/pool/updates/main/n/ncompress/ncompress_4.2.4 -15sarge2.dsc http://security.debian.org/pool/updates/main/n/ncompress/ncompress_4.2.4- 15sarge2.diff.gz http://security.debian.org/pool/updates/main/n/ncompress/ncompress_4.2.4. orig.tar.gz Alpha: http://security.debian.org/pool/updates/main/n/ncompress/ncompress_4.2.4- 15sarge2_alpha.deb AMD64: http://security.debian.org/pool/updates/main/n/ncompress/ncompress_4.2.4- 15sarge2_amd64.deb ARM: http://security.debian.org/pool/updates/main/n/ncompress/ncompress_4.2.4- 15sarge2_arm.deb Intel IA-32: http://security.debian.org/pool/updates/main/n/ncompress/ncompress_4.2.4- 15sarge2_i386.deb Intel IA-64: http://security.debian.org/pool/updates/main/n/ncompress/ncompress_4.2.4- 15sarge2_ia64.deb HPPA: http://security.debian.org/pool/updates/main/n/ncompress/ncompress_4.2.4- 15sarge2_hppa.deb Motorola 680x0: http://security.debian.org/pool/updates/main/n/ncompress/ncompress_4.2.4- 15sarge2_m68k.deb Big endian MIPS: http://security.debian.org/pool/updates/main/n/ncompress/ncompress_4.2.4- 15sarge2_mips.deb Little endian MIPS: http://security.debian.org/pool/updates/main/n/ncompress/ncompress_4.2.4- 15sarge2_mipsel.deb PowerPC: http://security.debian.org/pool/updates/main/n/ncompress/ncompress_4.2.4- 15sarge2_powerpc.deb IBM S/390: http://security.debian.org/pool/updates/main/n/ncompress/ncompress_4.2.4- 15sarge2_s390.deb Sun Sparc: http://security.debian.org/pool/updates/main/n/ncompress/ncompress_4.2.4- 15sarge2_sparc.deb MD5 checksums of the listed files are available in the original advisory. [***** End Debian Security Advisory DSA-1149-1 *****] _______________________________________________________________________________ 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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