__________________________________________________________ The U.S. Department of Energy Computer Incident Advisory Capability ___ __ __ _ ___ / | /_\ / \___ __|__ / \ \___ __________________________________________________________ INFORMATION BULLETIN Linux Neon and Cadaver Buffer Overflow Vulnerability [Debian Security Advisory DSA-506-1 and DSA-507-1] May 19, 2004 19:00 GMT Number O-148 [REVISED 01 Jun 2004] ______________________________________________________________________________ PROBLEM: Neon, an HTTP and WebDAV client library, contains a vulnerability. Cadaver, a command-line client for WebDAV Server that uses code from Neon, is also vulnerable. PLATFORM: Debian GNU/Linux 3.0 (woody) Red Hat Enterprise Linux AS, ES, WS v.2.1 Red Hat Linux Advanced Workstation 2.1 for the Itanium Processor SGI ProPack v2.4 DAMAGE: Neon code allows user input to be copied into variables that are not large enough for all cases and can lead to an overflow of a static heap variable. Cadaver uses builtin code from neon and is subject to the same vulnerability. SOLUTION: Install the updated packages. ______________________________________________________________________________ VULNERABILITY The risk is MEDIUM. An attacker may create a malicious WebDAV ASSESSMENT: server in such a way as to allow arbitrary code execution on the client should a user connect to it using cadaver. ______________________________________________________________________________ LINKS: CIAC BULLETIN: http://www.ciac.org/ciac/bulletins/o-148.shtml ORIGINAL BULLETIN: http://www.debian.org/security/2004/dsa-506 http://www.debian.org/security/2004/dsa-507 ADDITIONAL LINKS: - Red Hat Security Advisory RHSA-2004:191-06 https://rhn.redhat.com/errata/RHSA-2004-191.html - SGI Security Advisory 20040509-01-U, for ProPack 2.4, Patch 10077 ftp://patches.sgi.com/support/free/security/advisories/ 20040508-01-U.asc CVE/CAN: http://www.cve.mitre.org/cgi-bin/cvename.cgi?name= CAN-2004-0398 ______________________________________________________________________________ REVISION HISTORY: 06/01/04 - added link to SGI's Advisory for Patch 10077. [***** Start Debian Security Advisory DSA-506-1 *****] Debian Security Advisory DSA-506-1 neon -- buffer overflow Date Reported: 19 May 2004 Affected Packages: neon Vulnerable: Yes Security database references: In Mitre's CVE dictionary: CAN-2004-0398. More information: Stefan Esser discovered a problem in neon, an HTTP and WebDAV client library. User input is copied into variables not large enough for all cases. This can lead to an overflow of a static heap variable. For the stable distribution (woody) this problem has been fixed in version 0.19.3-2woody5. For the unstable distribution (sid) this problem has been fixed in version 0.23.9.dfsg-2 and neon_0.24.6.dfsg-1. We recommend that you upgrade your libneon* packages. Fixed in: Debian GNU/Linux 3.0 (woody) Source: http://security.debian.org/pool/updates/main/n/neon/neon_0.19.3-2woody5.dsc http://security.debian.org/pool/updates/main/n/neon/neon_0.19.3-2woody5.diff.gz http://security.debian.org/pool/updates/main/n/neon/neon_0.19.3.orig.tar.gz Alpha: http://security.debian.org/pool/updates/main/n/neon/libneon-dev_0.19.3-2 woody5_alpha.deb http://security.debian.org/pool/updates/main/n/neon/libneon19_0.19.3-2 woody5_alpha.deb ARM: http://security.debian.org/pool/updates/main/n/neon/libneon-dev_0.19.3-2 woody5_arm.deb http://security.debian.org/pool/updates/main/n/neon/libneon19_0.19.3-2 woody5_arm.deb Intel IA-32: http://security.debian.org/pool/updates/main/n/neon/libneon-dev_0.19.3-2 woody5_i386.deb http://security.debian.org/pool/updates/main/n/neon/libneon19_0.19.3-2 woody5_i386.deb Intel IA-64: http://security.debian.org/pool/updates/main/n/neon/libneon-dev_0.19.3-2 woody5_ia64.deb http://security.debian.org/pool/updates/main/n/neon/libneon19_0.19.3-2 woody5_ia64.deb HPPA: http://security.debian.org/pool/updates/main/n/neon/libneon-dev_0.19.3-2 woody5_hppa.deb http://security.debian.org/pool/updates/main/n/neon/libneon19_0.19.3-2 woody5_hppa.deb Motorola 680x0: http://security.debian.org/pool/updates/main/n/neon/libneon-dev_0.19.3-2 woody5_m68k.deb http://security.debian.org/pool/updates/main/n/neon/libneon19_0.19.3-2 woody5_m68k.deb Big endian MIPS: http://security.debian.org/pool/updates/main/n/neon/libneon-dev_0.19.3-2 woody5_mips.deb http://security.debian.org/pool/updates/main/n/neon/libneon19_0.19.3-2 woody5_mips.deb Little endian MIPS: http://security.debian.org/pool/updates/main/n/neon/libneon-dev_0.19.3-2 woody5_mipsel.deb http://security.debian.org/pool/updates/main/n/neon/libneon19_0.19.3-2 woody5_mipsel.deb PowerPC: http://security.debian.org/pool/updates/main/n/neon/libneon-dev_0.19.3-2 woody5_powerpc.deb http://security.debian.org/pool/updates/main/n/neon/libneon19_0.19.3-2 woody5_powerpc.deb IBM S/390: http://security.debian.org/pool/updates/main/n/neon/libneon-dev_0.19.3-2 woody5_s390.deb http://security.debian.org/pool/updates/main/n/neon/libneon19_0.19.3-2 woody5_s390.deb Sun Sparc: http://security.debian.org/pool/updates/main/n/neon/libneon-dev_0.19.3-2 woody5_sparc.deb http://security.debian.org/pool/updates/main/n/neon/libneon19_0.19.3-2 woody5_sparc.deb MD5 checksums of the listed files are available in the original advisory. [***** End Debian Security Advisory DSA-506-1 *****] [***** Start Debian Security Advisory DSA-507-1 *****] Debian Security Advisory DSA-507-1 cadaver -- buffer overflow Date Reported: 19 May 2004 Affected Packages: cadaver Vulnerable: Yes Security database references: In Mitre's CVE dictionary: CAN-2004-0398. More information: Stefan Esser discovered a problem in neon, an HTTP and WebDAV client library, which is also present in cadaver, a command-line client for WebDAV server. User input is copied into variables not large enough for all cases. This can lead to an overflow of a static heap variable. For the stable distribution (woody) this problem has been fixed in version 0.18.0-1woody3. For the unstable distribution (sid) this problem has been fixed in version 0.22.1-3. We recommend that you upgrade your cadaver package. Fixed in: Debian GNU/Linux 3.0 (woody) Source: http://security.debian.org/pool/updates/main/c/cadaver/cadaver_0.18.0-1 woody3.dsc http://security.debian.org/pool/updates/main/c/cadaver/cadaver_0.18.0-1 woody3.diff.gz http://security.debian.org/pool/updates/main/c/cadaver/cadaver_0.18.0. orig.tar.gz Alpha: http://security.debian.org/pool/updates/main/c/cadaver/cadaver_0.18.0-1 woody3_alpha.deb ARM: http://security.debian.org/pool/updates/main/c/cadaver/cadaver_0.18.0-1 woody3_arm.deb Intel IA-32: http://security.debian.org/pool/updates/main/c/cadaver/cadaver_0.18.0-1 woody3_i386.deb Intel IA-64: http://security.debian.org/pool/updates/main/c/cadaver/cadaver_0.18.0-1 woody3_ia64.deb HPPA: http://security.debian.org/pool/updates/main/c/cadaver/cadaver_0.18.0-1 woody3_hppa.deb Motorola 680x0: http://security.debian.org/pool/updates/main/c/cadaver/cadaver_0.18.0-1 woody3_m68k.deb Big endian MIPS: http://security.debian.org/pool/updates/main/c/cadaver/cadaver_0.18.0-1 woody3_mips.deb Little endian MIPS: http://security.debian.org/pool/updates/main/c/cadaver/cadaver_0.18.0-1 woody3_mipsel.deb PowerPC: http://security.debian.org/pool/updates/main/c/cadaver/cadaver_0.18.0-1 woody3_powerpc.deb IBM S/390: http://security.debian.org/pool/updates/main/c/cadaver/cadaver_0.18.0-1 woody3_s390.deb Sun Sparc: http://security.debian.org/pool/updates/main/c/cadaver/cadaver_0.18.0-1 woody3_sparc.deb MD5 checksums of the listed files are available in the original advisory. [***** End Debian Security Advisory DSA-507-1 *****] _______________________________________________________________________________ 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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