__________________________________________________________ The U.S. Department of Energy Computer Incident Advisory Capability ___ __ __ _ ___ / | /_\ / \___ __|__ / \ \___ __________________________________________________________ INFORMATION BULLETIN gnutls11 Cryptographic Weakness [DSA-1182-1] September 25, 2006 18:00 GMT Number Q-325 [REVISED 22 June 2007] ______________________________________________________________________________ PROBLEM: A flaw in GNU TLS cryptographic package that could allow an attacker to generate a forged signature that GNU TLS will accept as valid. PLATFORM: version 1.0.16-13.2sarge2 gnutls13 version 1.4.4-1 Solaris 10 Operating System DAMAGE: Allows remote attackers to forge a PKCS #1 v1.5 signature that is signed by that RSA key and prevents GnuTLS from correctly verifying X.509 and other certificates that use PKCS. SOLUTION: Apply current patches. ______________________________________________________________________________ VULNERABILITY The risk is LOW. Could allow an attacker to generate a forged ASSESSMENT: signature that will be accepted as valid. ______________________________________________________________________________ LINKS: CIAC BULLETIN: http://www.ciac.org/ciac/bulletins/q-325.shtml ORIGINAL BULLETIN: http://www.debian.org/security/2006/dsa-1182 ADDITIONALLINK: http://www.sunsolve.sun.com/search/document.do?assetkey=1-26-102970-1 CVE: http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-4790 ______________________________________________________________________________ REVISION HISTORY: 06/22/2007 - revised Q-325 to add a link to Sun Alert ID: 102970 for Solaris 10 Operating System. [***** Start DSA-1182-1 *****] Debian Security Advisory DSA-1182-1 gnutls11 -- cryptographic weakness Date Reported: 22 Sep 2006 Affected Packages: gnutls11 Vulnerable: Yes Security database references: In Mitre's CVE dictionary: CVE-2006-4790. More information: Daniel Bleichenbacher discovered a flaw in GNU TLS cryptographic package that could allow an attacker to generate a forged signature that GNU TLS will accept as valid. For the stable distribution (sarge) this problem has been fixed in version 1.0.16-13.2sarge2. The unstable distribution (sid) does no longer contain gnutls11, for gnutls13 this problem has been fixed in version 1.4.4-1. We recommend that you upgrade your GNU TLS package. Fixed in: Debian GNU/Linux 3.1 (sarge) Source: http://security.debian.org/pool/updates/main/g/gnutls11/gnutls11_1.0.16-13.2sarge2.dsc http://security.debian.org/pool/updates/main/g/gnutls11/gnutls11_1.0.16-13.2sarge2.diff.gz http://security.debian.org/pool/updates/main/g/gnutls11/gnutls11_1.0.16.orig.tar.gz Alpha: http://security.debian.org/pool/updates/main/g/gnutls11/gnutls-bin_1.0.16-13.2sarge2_alpha.deb http://security.debian.org/pool/updates/main/g/gnutls11/libgnutls11_1.0.16-13.2sarge2_alpha.deb http://security.debian.org/pool/updates/main/g/gnutls11/libgnutls11-dbg_1.0.16-13.2sarge2_alpha.deb http://security.debian.org/pool/updates/main/g/gnutls11/libgnutls11-dev_1.0.16-13.2sarge2_alpha.deb AMD64: http://security.debian.org/pool/updates/main/g/gnutls11/gnutls-bin_1.0.16-13.2sarge2_amd64.deb http://security.debian.org/pool/updates/main/g/gnutls11/libgnutls11_1.0.16-13.2sarge2_amd64.deb http://security.debian.org/pool/updates/main/g/gnutls11/libgnutls11-dbg_1.0.16-13.2sarge2_amd64.deb http://security.debian.org/pool/updates/main/g/gnutls11/libgnutls11-dev_1.0.16-13.2sarge2_amd64.deb ARM: http://security.debian.org/pool/updates/main/g/gnutls11/gnutls-bin_1.0.16-13.2sarge2_arm.deb http://security.debian.org/pool/updates/main/g/gnutls11/libgnutls11_1.0.16-13.2sarge2_arm.deb http://security.debian.org/pool/updates/main/g/gnutls11/libgnutls11-dbg_1.0.16-13.2sarge2_arm.deb http://security.debian.org/pool/updates/main/g/gnutls11/libgnutls11-dev_1.0.16-13.2sarge2_arm.deb HPPA: http://security.debian.org/pool/updates/main/g/gnutls11/gnutls-bin_1.0.16-13.2sarge2_hppa.deb http://security.debian.org/pool/updates/main/g/gnutls11/libgnutls11_1.0.16-13.2sarge2_hppa.deb http://security.debian.org/pool/updates/main/g/gnutls11/libgnutls11-dbg_1.0.16-13.2sarge2_hppa.deb http://security.debian.org/pool/updates/main/g/gnutls11/libgnutls11-dev_1.0.16-13.2sarge2_hppa.deb Intel IA-32: http://security.debian.org/pool/updates/main/g/gnutls11/gnutls-bin_1.0.16-13.2sarge2_i386.deb http://security.debian.org/pool/updates/main/g/gnutls11/libgnutls11_1.0.16-13.2sarge2_i386.deb http://security.debian.org/pool/updates/main/g/gnutls11/libgnutls11-dbg_1.0.16-13.2sarge2_i386.deb http://security.debian.org/pool/updates/main/g/gnutls11/libgnutls11-dev_1.0.16-13.2sarge2_i386.deb Intel IA-64: http://security.debian.org/pool/updates/main/g/gnutls11/gnutls-bin_1.0.16-13.2sarge2_ia64.deb http://security.debian.org/pool/updates/main/g/gnutls11/libgnutls11_1.0.16-13.2sarge2_ia64.deb http://security.debian.org/pool/updates/main/g/gnutls11/libgnutls11-dbg_1.0.16-13.2sarge2_ia64.deb http://security.debian.org/pool/updates/main/g/gnutls11/libgnutls11-dev_1.0.16-13.2sarge2_ia64.deb Motorola 680x0: http://security.debian.org/pool/updates/main/g/gnutls11/gnutls-bin_1.0.16-13.2sarge2_m68k.deb http://security.debian.org/pool/updates/main/g/gnutls11/libgnutls11_1.0.16-13.2sarge2_m68k.deb http://security.debian.org/pool/updates/main/g/gnutls11/libgnutls11-dbg_1.0.16-13.2sarge2_m68k.deb http://security.debian.org/pool/updates/main/g/gnutls11/libgnutls11-dev_1.0.16-13.2sarge2_m68k.deb Big endian MIPS: http://security.debian.org/pool/updates/main/g/gnutls11/gnutls-bin_1.0.16-13.2sarge2_mips.deb http://security.debian.org/pool/updates/main/g/gnutls11/libgnutls11_1.0.16-13.2sarge2_mips.deb http://security.debian.org/pool/updates/main/g/gnutls11/libgnutls11-dbg_1.0.16-13.2sarge2_mips.deb http://security.debian.org/pool/updates/main/g/gnutls11/libgnutls11-dev_1.0.16-13.2sarge2_mips.deb Little endian MIPS: http://security.debian.org/pool/updates/main/g/gnutls11/gnutls-bin_1.0.16-13.2sarge2_mipsel.deb http://security.debian.org/pool/updates/main/g/gnutls11/libgnutls11_1.0.16-13.2sarge2_mipsel.deb http://security.debian.org/pool/updates/main/g/gnutls11/libgnutls11-dbg_1.0.16-13.2sarge2_mipsel.deb http://security.debian.org/pool/updates/main/g/gnutls11/libgnutls11-dev_1.0.16-13.2sarge2_mipsel.deb PowerPC: http://security.debian.org/pool/updates/main/g/gnutls11/gnutls-bin_1.0.16-13.2sarge2_powerpc.deb http://security.debian.org/pool/updates/main/g/gnutls11/libgnutls11_1.0.16-13.2sarge2_powerpc.deb http://security.debian.org/pool/updates/main/g/gnutls11/libgnutls11-dbg_1.0.16-13.2sarge2_powerpc.deb http://security.debian.org/pool/updates/main/g/gnutls11/libgnutls11-dev_1.0.16-13.2sarge2_powerpc.deb IBM S/390: http://security.debian.org/pool/updates/main/g/gnutls11/gnutls-bin_1.0.16-13.2sarge2_s390.deb http://security.debian.org/pool/updates/main/g/gnutls11/libgnutls11_1.0.16-13.2sarge2_s390.deb http://security.debian.org/pool/updates/main/g/gnutls11/libgnutls11-dbg_1.0.16-13.2sarge2_s390.deb http://security.debian.org/pool/updates/main/g/gnutls11/libgnutls11-dev_1.0.16-13.2sarge2_s390.deb Sun Sparc: http://security.debian.org/pool/updates/main/g/gnutls11/gnutls-bin_1.0.16-13.2sarge2_sparc.deb http://security.debian.org/pool/updates/main/g/gnutls11/libgnutls11_1.0.16-13.2sarge2_sparc.deb http://security.debian.org/pool/updates/main/g/gnutls11/libgnutls11-dbg_1.0.16-13.2sarge2_sparc.deb http://security.debian.org/pool/updates/main/g/gnutls11/libgnutls11-dev_1.0.16-13.2sarge2_sparc.deb MD5 checksums of the listed files are available in the original advisory. [***** End DSA-1182-1 *****] _______________________________________________________________________________ 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. LAST 10 CIAC BULLETINS ISSUED (Previous bulletins available from CIAC) Q-314: QuickTime 7.1.3 Q-315: isakmpd - Programming Error Q-316: HP OpenView Operations Q-317: Firefox Security Update Q-318: Usermin Programming Error Q-319: Gzip Security Update Q-320: Vulnerability in Vector Markup Language Q-321: PHP Security Update Q-323: AirPort Update 2006-001 and Apple Security Update 2006-005 Q-324: Cisco Guard Enables Cross Site Scripting