Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2006.0667 -- [UNIX/Linux][RedHat][OSX] Important: gnutls security update 15 September 2006 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: GnuTLS prior to 1.4.4 Publisher: Red Hat Operating System: Red Hat Enterprise Linux AS/ES/WS 4 Red Hat Enterprise Linux Desktop 4 UNIX variants (UNIX, Linux, OSX) Windows Impact: Reduced Security Access: Remote/Unauthenticated CVE Names: CVE-2006-4790 Original Bulletin: https://rhn.redhat.com/errata/RHSA-2006-0680.html Comment: This advisory references vulnerabilities in products which run on platforms other than Red Hat. It is recommended that administrators running software which utilises the GnuTLS library check for an updated version of the software for their operating system. - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 - - --------------------------------------------------------------------- Red Hat Security Advisory Synopsis: Important: gnutls security update Advisory ID: RHSA-2006:0680-01 Advisory URL: https://rhn.redhat.com/errata/RHSA-2006-0680.html Issue date: 2006-09-14 Updated on: 2006-09-14 Product: Red Hat Enterprise Linux CVE Names: CVE-2006-4790 - - --------------------------------------------------------------------- 1. Summary: Updated gnutls packages that fix a security issue are now available for Red Hat Enterprise Linux 4. This update has been rated as having important security impact by the Red Hat Security Response Team. 2. Relevant releases/architectures: Red Hat Enterprise Linux AS version 4 - i386, ia64, ppc, s390, s390x, x86_64 Red Hat Enterprise Linux Desktop version 4 - i386, x86_64 Red Hat Enterprise Linux ES version 4 - i386, ia64, x86_64 Red Hat Enterprise Linux WS version 4 - i386, ia64, x86_64 3. Problem description: The GnuTLS Library provides support for cryptographic algorithms and protocols such as TLS. GnuTLS includes libtasn1, a library developed for ASN.1 structures management that includes DER encoding and decoding. Daniel Bleichenbacher recently described an attack on PKCS #1 v1.5 signatures. Where an RSA key with exponent 3 is used it may be possible for an attacker to forge a PKCS #1 v1.5 signature that would be incorrectly verified by implementations that do not check for excess data in the RSA exponentiation result of the signature. The core GnuTLS team discovered that GnuTLS is vulnerable to a variant of the Bleichenbacker attack. This issue affects applications that use GnuTLS to verify X.509 certificates as well as other uses of PKCS #1 v1.5. (CVE-2006-4790) In Red Hat Enterprise Linux 4, the GnuTLS library is only used by the Evolution client when connecting to an Exchange server or when publishing calendar information to a WebDAV server. Users are advised to upgrade to these updated packages, which contain a backported patch from the GnuTLS maintainers to correct this issue. 4. Solution: Before applying this update, make sure all previously released errata relevant to your system have been applied. This update is available via Red Hat Network. To use Red Hat Network, launch the Red Hat Update Agent with the following command: up2date This will start an interactive process that will result in the appropriate RPMs being upgraded on your system. 5. Bug IDs fixed (http://bugzilla.redhat.com/): 206411 - CVE-2006-4790 RSA forgery affects gnutls 6. RPMs required: Red Hat Enterprise Linux AS version 4: SRPMS: ftp://updates.redhat.com/enterprise/4AS/en/os/SRPMS/gnutls-1.0.20-3.2.3.src.rpm 60106ff0a4fcc6bdfab8d262c1157469 gnutls-1.0.20-3.2.3.src.rpm i386: f749e542a24f251e6dc2603c9cce1402 gnutls-1.0.20-3.2.3.i386.rpm 91a8b01e402bc0a8c6a298b504f1f89d gnutls-debuginfo-1.0.20-3.2.3.i386.rpm 60cb9b56ffab6fc8ec9df1f53c82da51 gnutls-devel-1.0.20-3.2.3.i386.rpm ia64: f749e542a24f251e6dc2603c9cce1402 gnutls-1.0.20-3.2.3.i386.rpm 84cec28ca548482b2409eba04bc5cc2a gnutls-1.0.20-3.2.3.ia64.rpm 91a8b01e402bc0a8c6a298b504f1f89d gnutls-debuginfo-1.0.20-3.2.3.i386.rpm a49fa92fae38882c930ec62c98f41b88 gnutls-debuginfo-1.0.20-3.2.3.ia64.rpm fd378955aa68beb8b695f54a5b96e32a gnutls-devel-1.0.20-3.2.3.ia64.rpm ppc: 5fe6d74ce6a3cba718f73727c15da477 gnutls-1.0.20-3.2.3.ppc.rpm d80d9c580e4f9fb2618d507ebcd04cd4 gnutls-1.0.20-3.2.3.ppc64.rpm 333733276d385a239998945576296d79 gnutls-debuginfo-1.0.20-3.2.3.ppc.rpm 3c38dd8f661acfd9aaff889437958905 gnutls-debuginfo-1.0.20-3.2.3.ppc64.rpm 38d15bbdbc6bfa0a42c59af2c4721800 gnutls-devel-1.0.20-3.2.3.ppc.rpm s390: 0d492813efdd04c1857a070c3365b603 gnutls-1.0.20-3.2.3.s390.rpm 9d202406a60b67b6f737f41a77b766c3 gnutls-debuginfo-1.0.20-3.2.3.s390.rpm 48ee2a6d838bdb54a8965af9e2a4a2d5 gnutls-devel-1.0.20-3.2.3.s390.rpm s390x: 0d492813efdd04c1857a070c3365b603 gnutls-1.0.20-3.2.3.s390.rpm b2c8606d60365818d5e80d32ea654679 gnutls-1.0.20-3.2.3.s390x.rpm 9d202406a60b67b6f737f41a77b766c3 gnutls-debuginfo-1.0.20-3.2.3.s390.rpm 8037461d552b896fcffd895a447e46d1 gnutls-debuginfo-1.0.20-3.2.3.s390x.rpm c9ea3c076c05e4c54ce9b85bfceb916d gnutls-devel-1.0.20-3.2.3.s390x.rpm x86_64: f749e542a24f251e6dc2603c9cce1402 gnutls-1.0.20-3.2.3.i386.rpm 9f3f2b568ba75803f9d7b75385310877 gnutls-1.0.20-3.2.3.x86_64.rpm 91a8b01e402bc0a8c6a298b504f1f89d gnutls-debuginfo-1.0.20-3.2.3.i386.rpm 79ee23a3f032fb2f04b6fa63d243849b gnutls-debuginfo-1.0.20-3.2.3.x86_64.rpm 6917afed0d2c314879b52ce4138b47fc gnutls-devel-1.0.20-3.2.3.x86_64.rpm Red Hat Enterprise Linux Desktop version 4: SRPMS: ftp://updates.redhat.com/enterprise/4Desktop/en/os/SRPMS/gnutls-1.0.20-3.2.3.src.rpm 60106ff0a4fcc6bdfab8d262c1157469 gnutls-1.0.20-3.2.3.src.rpm i386: f749e542a24f251e6dc2603c9cce1402 gnutls-1.0.20-3.2.3.i386.rpm 91a8b01e402bc0a8c6a298b504f1f89d gnutls-debuginfo-1.0.20-3.2.3.i386.rpm 60cb9b56ffab6fc8ec9df1f53c82da51 gnutls-devel-1.0.20-3.2.3.i386.rpm x86_64: f749e542a24f251e6dc2603c9cce1402 gnutls-1.0.20-3.2.3.i386.rpm 9f3f2b568ba75803f9d7b75385310877 gnutls-1.0.20-3.2.3.x86_64.rpm 91a8b01e402bc0a8c6a298b504f1f89d gnutls-debuginfo-1.0.20-3.2.3.i386.rpm 79ee23a3f032fb2f04b6fa63d243849b gnutls-debuginfo-1.0.20-3.2.3.x86_64.rpm 6917afed0d2c314879b52ce4138b47fc gnutls-devel-1.0.20-3.2.3.x86_64.rpm Red Hat Enterprise Linux ES version 4: SRPMS: ftp://updates.redhat.com/enterprise/4ES/en/os/SRPMS/gnutls-1.0.20-3.2.3.src.rpm 60106ff0a4fcc6bdfab8d262c1157469 gnutls-1.0.20-3.2.3.src.rpm i386: f749e542a24f251e6dc2603c9cce1402 gnutls-1.0.20-3.2.3.i386.rpm 91a8b01e402bc0a8c6a298b504f1f89d gnutls-debuginfo-1.0.20-3.2.3.i386.rpm 60cb9b56ffab6fc8ec9df1f53c82da51 gnutls-devel-1.0.20-3.2.3.i386.rpm ia64: f749e542a24f251e6dc2603c9cce1402 gnutls-1.0.20-3.2.3.i386.rpm 84cec28ca548482b2409eba04bc5cc2a gnutls-1.0.20-3.2.3.ia64.rpm 91a8b01e402bc0a8c6a298b504f1f89d gnutls-debuginfo-1.0.20-3.2.3.i386.rpm a49fa92fae38882c930ec62c98f41b88 gnutls-debuginfo-1.0.20-3.2.3.ia64.rpm fd378955aa68beb8b695f54a5b96e32a gnutls-devel-1.0.20-3.2.3.ia64.rpm x86_64: f749e542a24f251e6dc2603c9cce1402 gnutls-1.0.20-3.2.3.i386.rpm 9f3f2b568ba75803f9d7b75385310877 gnutls-1.0.20-3.2.3.x86_64.rpm 91a8b01e402bc0a8c6a298b504f1f89d gnutls-debuginfo-1.0.20-3.2.3.i386.rpm 79ee23a3f032fb2f04b6fa63d243849b gnutls-debuginfo-1.0.20-3.2.3.x86_64.rpm 6917afed0d2c314879b52ce4138b47fc gnutls-devel-1.0.20-3.2.3.x86_64.rpm Red Hat Enterprise Linux WS version 4: SRPMS: ftp://updates.redhat.com/enterprise/4WS/en/os/SRPMS/gnutls-1.0.20-3.2.3.src.rpm 60106ff0a4fcc6bdfab8d262c1157469 gnutls-1.0.20-3.2.3.src.rpm i386: f749e542a24f251e6dc2603c9cce1402 gnutls-1.0.20-3.2.3.i386.rpm 91a8b01e402bc0a8c6a298b504f1f89d gnutls-debuginfo-1.0.20-3.2.3.i386.rpm 60cb9b56ffab6fc8ec9df1f53c82da51 gnutls-devel-1.0.20-3.2.3.i386.rpm ia64: f749e542a24f251e6dc2603c9cce1402 gnutls-1.0.20-3.2.3.i386.rpm 84cec28ca548482b2409eba04bc5cc2a gnutls-1.0.20-3.2.3.ia64.rpm 91a8b01e402bc0a8c6a298b504f1f89d gnutls-debuginfo-1.0.20-3.2.3.i386.rpm a49fa92fae38882c930ec62c98f41b88 gnutls-debuginfo-1.0.20-3.2.3.ia64.rpm fd378955aa68beb8b695f54a5b96e32a gnutls-devel-1.0.20-3.2.3.ia64.rpm x86_64: f749e542a24f251e6dc2603c9cce1402 gnutls-1.0.20-3.2.3.i386.rpm 9f3f2b568ba75803f9d7b75385310877 gnutls-1.0.20-3.2.3.x86_64.rpm 91a8b01e402bc0a8c6a298b504f1f89d gnutls-debuginfo-1.0.20-3.2.3.i386.rpm 79ee23a3f032fb2f04b6fa63d243849b gnutls-debuginfo-1.0.20-3.2.3.x86_64.rpm 6917afed0d2c314879b52ce4138b47fc gnutls-devel-1.0.20-3.2.3.x86_64.rpm These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from https://www.redhat.com/security/team/key/#package 7. References: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-4790 http://www.redhat.com/security/updates/classification/#important 8. Contact: The Red Hat security contact is <secalert@redhat.com>. More contact details at https://www.redhat.com/security/team/contact/ Copyright 2006 Red Hat, Inc. - -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.1 (GNU/Linux) iD8DBQFFCWZSXlSAg2UNWIIRAvxsAKCvA3U6HHu89i9YEb+FO1ayZ64UxACfazU5 o/mUa6YLHHU7Rfoo44OIbN4= =0HwQ - -----END PGP SIGNATURE----- - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: http://www.auscert.org.au/render.html?cid=1980 If you believe that your computer system has been compromised or attacked in any way, we encourage you to let us know by completing the secure National IT Incident Reporting Form at: http://www.auscert.org.au/render.html?it=3192 =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQCVAwUBRQo3PCh9+71yA2DNAQLmsQP/fRtOqkSVXyAReVKLKptaXuQ+oeRDfk6h WGPVVdfyyzI/Rqb0ZPSb2R2R815lc18xG78FBsM0IXvTp7xbyKX/2Uq29kxEoUS6 ZMwZbHHJH/VSxpDCYdndxDFCcU3VXOdQ3BrR4kpq92+2aRffrIq0ZdxCccXD/isM ye5NuuCjVeg= =q5uQ -----END PGP SIGNATURE-----