news 28 Posted October 24, 2013 -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ===================================================================== Red Hat Security Advisory Synopsis: Moderate: gnupg security update Advisory ID: RHSA-2013:1458-01 Product: Red Hat Enterprise Linux Advisory URL: https://rhn.redhat.com/errata/RHSA-2013-1458.html Issue date: 2013-10-24 CVE Names: CVE-2012-6085 CVE-2013-4242 CVE-2013-4351 CVE-2013-4402 ===================================================================== 1. Summary: An updated gnupg package that fixes multiple security issues is 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: 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 GNU Privacy Guard (GnuPG or GPG) is a tool for encrypting data and creating digital signatures, compliant with the proposed OpenPGP Internet standard and the S/MIME standard. It was found that GnuPG was vulnerable to the Yarom/Falkner flush+reload cache side-channel attack on the RSA secret exponent. An attacker able to execute a process on the logical CPU that shared the L3 cache with the GnuPG process (such as a different local user or a user of a KVM guest running on the same host with the kernel same-page merging functionality enabled) could possibly use this flaw to obtain portions of the RSA secret key. (CVE-2013-4242) A denial of service flaw was found in the way GnuPG parsed certain compressed OpenPGP packets. An attacker could use this flaw to send specially crafted input data to GnuPG, making GnuPG enter an infinite loop when parsing data. (CVE-2013-4402) It was found that importing a corrupted public key into a GnuPG keyring database corrupted that keyring. An attacker could use this flaw to trick a local user into importing a specially crafted public key into their keyring database, causing the keyring to be corrupted and preventing its further use. (CVE-2012-6085) It was found that GnuPG did not properly interpret the key flags in a PGP key packet. GPG could accept a key for uses not indicated by its holder. (CVE-2013-4351) Red Hat would like to thank Werner Koch for reporting the CVE-2013-4402 issue. Upstream acknowledges Taylor R Campbell as the original reporter. All gnupg users are advised to upgrade to this updated package, which contains backported patches to correct these issues. 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 https://access.redhat.com/site/articles/11258 5. Bugs fixed (http://bugzilla.redhat.com/): 891142 - CVE-2012-6085 GnuPG: read_block() corrupt key input validation 988589 - CVE-2013-4242 GnuPG susceptible to Yarom/Falkner flush+reload cache side-channel attack 1010137 - CVE-2013-4351 gnupg: treats no-usage-permitted keys as all-usages-permitted 1015685 - CVE-2013-4402 GnuPG: infinite recursion in the compressed packet parser DoS 6. Package List: Red Hat Enterprise Linux Desktop (v. 5 client): Source: ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Client/en/os/SRPMS/gnupg-1.4.5-18.el5_10.src.rpm i386: gnupg-1.4.5-18.el5_10.i386.rpm gnupg-debuginfo-1.4.5-18.el5_10.i386.rpm x86_64: gnupg-1.4.5-18.el5_10.x86_64.rpm gnupg-debuginfo-1.4.5-18.el5_10.x86_64.rpm Red Hat Enterprise Linux (v. 5 server): Source: ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Server/en/os/SRPMS/gnupg-1.4.5-18.el5_10.src.rpm i386: gnupg-1.4.5-18.el5_10.i386.rpm gnupg-debuginfo-1.4.5-18.el5_10.i386.rpm ia64: gnupg-1.4.5-18.el5_10.ia64.rpm gnupg-debuginfo-1.4.5-18.el5_10.ia64.rpm ppc: gnupg-1.4.5-18.el5_10.ppc.rpm gnupg-debuginfo-1.4.5-18.el5_10.ppc.rpm s390x: gnupg-1.4.5-18.el5_10.s390x.rpm gnupg-debuginfo-1.4.5-18.el5_10.s390x.rpm x86_64: gnupg-1.4.5-18.el5_10.x86_64.rpm gnupg-debuginfo-1.4.5-18.el5_10.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://access.redhat.com/security/team/key/#package 7. References: https://www.redhat.com/security/data/cve/CVE-2012-6085.html https://www.redhat.com/security/data/cve/CVE-2013-4242.html https://www.redhat.com/security/data/cve/CVE-2013-4351.html https://www.redhat.com/security/data/cve/CVE-2013-4402.html https://access.redhat.com/security/updates/classification/#moderate 8. Contact: The Red Hat security contact is . More contact details at https://access.redhat.com/security/team/contact/ Copyright 2013 Red Hat, Inc. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.4 (GNU/Linux) iD8DBQFSaTzeXlSAg2UNWIIRAuZvAJ93/bPF5XiUzGd5pwRa0ZYTVp/KngCfSqbg D1l6mFb8d+AcZmHt4uWJjhA= =ZSJL -----END PGP SIGNATURE----- -- Share this post Link to post
