news 28 Posted March 25, 2010 -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ===================================================================== Red Hat Security Advisory Synopsis: Moderate: gnutls security update Advisory ID: RHSA-2010:0166-01 Product: Red Hat Enterprise Linux Advisory URL: https://rhn.redhat.com/errata/RHSA-2010-0166.html Issue date: 2010-03-25 CVE Names: CVE-2009-2409 CVE-2009-3555 ===================================================================== 1. Summary: Updated gnutls packages that fix two security issues are now available for Red Hat Enterprise Linux 5. The Red Hat Security Response Team has rated this update as having moderate security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section. 2. Relevant releases/architectures: RHEL Desktop Workstation (v. 5 client) - i386, x86_64 Red Hat Enterprise Linux (v. 5 server) - i386, ia64, ppc, s390x, x86_64 Red Hat Enterprise Linux Desktop (v. 5 client) - i386, x86_64 3. Description: The GnuTLS library provides support for cryptographic algorithms and for protocols such as Transport Layer Security (TLS). A flaw was found in the way the TLS/SSL (Transport Layer Security/Secure Sockets Layer) protocols handled session renegotiation. A man-in-the-middle attacker could use this flaw to prefix arbitrary plain text to a client's session (for example, an HTTPS connection to a website). This could force the server to process an attacker's request as if authenticated using the victim's credentials. This update addresses this flaw by implementing the TLS Renegotiation Indication Extension, as defined in RFC 5746. (CVE-2009-3555) Refer to the following Knowledgebase article for additional details about the CVE-2009-3555 flaw: http://kbase.redhat.com/faq/docs/DOC-20491 Dan Kaminsky found that browsers could accept certificates with MD2 hash signatures, even though MD2 is no longer considered a cryptographically strong algorithm. This could make it easier for an attacker to create a malicious certificate that would be treated as trusted by a browser. GnuTLS now disables the use of the MD2 algorithm inside signatures by default. (CVE-2009-2409) Users of GnuTLS are advised to upgrade to these updated packages, which contain backported patches to correct these issues. For the update to take effect, all applications linked to the GnuTLS library must be restarted, or the system rebooted. 4. Solution: Before applying this update, make sure all previously-released errata relevant to your system have been applied. This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at http://kbase.redhat.com/faq/docs/DOC-11259 5. Bugs fixed (http://bugzilla.redhat.com/): 510197 - CVE-2009-2409 deprecate MD2 in SSL cert validation (Kaminsky) 533125 - CVE-2009-3555 TLS: MITM attacks via session renegotiation 6. Package List: Red Hat Enterprise Linux Desktop (v. 5 client): Source: ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Client/en/os/SRPMS/gnutls-1.4.1-3.el5_4.8.src.rpm i386: gnutls-1.4.1-3.el5_4.8.i386.rpm gnutls-debuginfo-1.4.1-3.el5_4.8.i386.rpm gnutls-utils-1.4.1-3.el5_4.8.i386.rpm x86_64: gnutls-1.4.1-3.el5_4.8.i386.rpm gnutls-1.4.1-3.el5_4.8.x86_64.rpm gnutls-debuginfo-1.4.1-3.el5_4.8.i386.rpm gnutls-debuginfo-1.4.1-3.el5_4.8.x86_64.rpm gnutls-utils-1.4.1-3.el5_4.8.x86_64.rpm RHEL Desktop Workstation (v. 5 client): Source: ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Client/en/os/SRPMS/gnutls-1.4.1-3.el5_4.8.src.rpm i386: gnutls-debuginfo-1.4.1-3.el5_4.8.i386.rpm gnutls-devel-1.4.1-3.el5_4.8.i386.rpm x86_64: gnutls-debuginfo-1.4.1-3.el5_4.8.i386.rpm gnutls-debuginfo-1.4.1-3.el5_4.8.x86_64.rpm gnutls-devel-1.4.1-3.el5_4.8.i386.rpm gnutls-devel-1.4.1-3.el5_4.8.x86_64.rpm Red Hat Enterprise Linux (v. 5 server): Source: ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Server/en/os/SRPMS/gnutls-1.4.1-3.el5_4.8.src.rpm i386: gnutls-1.4.1-3.el5_4.8.i386.rpm gnutls-debuginfo-1.4.1-3.el5_4.8.i386.rpm gnutls-devel-1.4.1-3.el5_4.8.i386.rpm gnutls-utils-1.4.1-3.el5_4.8.i386.rpm ia64: gnutls-1.4.1-3.el5_4.8.i386.rpm gnutls-1.4.1-3.el5_4.8.ia64.rpm gnutls-debuginfo-1.4.1-3.el5_4.8.i386.rpm gnutls-debuginfo-1.4.1-3.el5_4.8.ia64.rpm gnutls-devel-1.4.1-3.el5_4.8.ia64.rpm gnutls-utils-1.4.1-3.el5_4.8.ia64.rpm ppc: gnutls-1.4.1-3.el5_4.8.ppc.rpm gnutls-1.4.1-3.el5_4.8.ppc64.rpm gnutls-debuginfo-1.4.1-3.el5_4.8.ppc.rpm gnutls-debuginfo-1.4.1-3.el5_4.8.ppc64.rpm gnutls-devel-1.4.1-3.el5_4.8.ppc.rpm gnutls-devel-1.4.1-3.el5_4.8.ppc64.rpm gnutls-utils-1.4.1-3.el5_4.8.ppc.rpm s390x: gnutls-1.4.1-3.el5_4.8.s390.rpm gnutls-1.4.1-3.el5_4.8.s390x.rpm gnutls-debuginfo-1.4.1-3.el5_4.8.s390.rpm gnutls-debuginfo-1.4.1-3.el5_4.8.s390x.rpm gnutls-devel-1.4.1-3.el5_4.8.s390.rpm gnutls-devel-1.4.1-3.el5_4.8.s390x.rpm gnutls-utils-1.4.1-3.el5_4.8.s390x.rpm x86_64: gnutls-1.4.1-3.el5_4.8.i386.rpm gnutls-1.4.1-3.el5_4.8.x86_64.rpm gnutls-debuginfo-1.4.1-3.el5_4.8.i386.rpm gnutls-debuginfo-1.4.1-3.el5_4.8.x86_64.rpm gnutls-devel-1.4.1-3.el5_4.8.i386.rpm gnutls-devel-1.4.1-3.el5_4.8.x86_64.rpm gnutls-utils-1.4.1-3.el5_4.8.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: https://www.redhat.com/security/data/cve/CVE-2009-2409.html https://www.redhat.com/security/data/cve/CVE-2009-3555.html http://www.redhat.com/security/updates/classification/#moderate http://kbase.redhat.com/faq/docs/DOC-20491 8. Contact: The Red Hat security contact is . More contact details at https://www.redhat.com/security/team/contact/ Copyright 2010 Red Hat, Inc. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.4 (GNU/Linux) iD8DBQFLq0L9XlSAg2UNWIIRAlTdAJ9/f95/Xu9E4bQ0yhF0BTFP4PrMLwCgkgip /nHNcTR+TNuZsl7SzbvQozo= =hJDd -----END PGP SIGNATURE----- -- Share this post Link to post
