-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ===================================================================== Red Hat Security Advisory Synopsis: Important: glibc security update Advisory ID: RHSA-2015:2589-01 Product: Red Hat Enterprise Linux Advisory URL: https://rhn.redhat.com/errata/RHSA-2015-2589.html Issue date: 2015-12-09 CVE Names: CVE-2013-7423 CVE-2015-1472 CVE-2015-1473 CVE-2015-1781 CVE-2015-5277 ===================================================================== 1. Summary: Updated glibc packages that fix multiple security issues are now available for Red Hat Enterprise Linux 7.1 Extended Update Support. Red Hat Product Security has rated this update as having Important 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 ComputeNode EUS (v. 7.1) - x86_64 Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.1) - x86_64 Red Hat Enterprise Linux Server EUS (v. 7.1) - ppc64, ppc64le, s390x, x86_64 Red Hat Enterprise Linux Server Optional EUS (v. 7.1) - ppc64, ppc64le, s390x, x86_64 3. Description: The glibc packages provide the standard C libraries (libc), POSIX thread libraries (libpthread), standard math libraries (libm), and the Name Server Caching Daemon (nscd) used by multiple programs on the system. Without these libraries, the Linux system cannot function correctly. It was discovered that the nss_files backend for the Name Service Switch in glibc would return incorrect data to applications or corrupt the heap (depending on adjacent heap contents). A local attacker could potentially use this flaw to execute arbitrary code on the system. (CVE-2015-5277) It was discovered that, under certain circumstances, glibc's getaddrinfo() function would send DNS queries to random file descriptors. An attacker could potentially use this flaw to send DNS queries to unintended recipients, resulting in information disclosure or data loss due to the application encountering corrupted data. (CVE-2013-7423) A buffer overflow flaw was found in the way glibc's gethostbyname_r() and other related functions computed the size of a buffer when passed a misaligned buffer as input. An attacker able to make an application call any of these functions with a misaligned buffer could use this flaw to crash the application or, potentially, execute arbitrary code with the permissions of the user running the application. (CVE-2015-1781) A heap-based buffer overflow flaw and a stack overflow flaw were found in glibc's swscanf() function. An attacker able to make an application call the swscanf() function could use these flaws to crash that application or, potentially, execute arbitrary code with the permissions of the user running the application. (CVE-2015-1472, CVE-2015-1473) The CVE-2015-5277 issue was discovered by Sumit Bose and Lukáš Slebodník of Red Hat, and the CVE-2015-1781 issue was discovered by Arjun Shankar of Red Hat. All glibc users are advised to upgrade to these updated packages, which contain 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. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258 5. Bugs fixed (https://bugzilla.redhat.com/): 1187109 - CVE-2013-7423 glibc: getaddrinfo() writes DNS queries to random file descriptors under high load 1188235 - CVE-2015-1472 glibc: heap buffer overflow in glibc swscanf 1199525 - CVE-2015-1781 glibc: buffer overflow in gethostbyname_r() and related functions with misaligned buffer 1209105 - CVE-2015-1473 glibc: Stack-overflow in glibc swscanf 1262914 - CVE-2015-5277 glibc: data corruption while reading the NSS files database 6. Package List: Red Hat Enterprise Linux ComputeNode EUS (v. 7.1): Source: glibc-2.17-79.el7_1.src.rpm x86_64: glibc-2.17-79.el7_1.i686.rpm glibc-2.17-79.el7_1.x86_64.rpm glibc-common-2.17-79.el7_1.x86_64.rpm glibc-debuginfo-2.17-79.el7_1.i686.rpm glibc-debuginfo-2.17-79.el7_1.x86_64.rpm glibc-debuginfo-common-2.17-79.el7_1.i686.rpm glibc-debuginfo-common-2.17-79.el7_1.x86_64.rpm glibc-devel-2.17-79.el7_1.i686.rpm glibc-devel-2.17-79.el7_1.x86_64.rpm glibc-headers-2.17-79.el7_1.x86_64.rpm glibc-utils-2.17-79.el7_1.x86_64.rpm nscd-2.17-79.el7_1.x86_64.rpm Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.1): x86_64: glibc-debuginfo-2.17-79.el7_1.i686.rpm glibc-debuginfo-2.17-79.el7_1.x86_64.rpm glibc-debuginfo-common-2.17-79.el7_1.i686.rpm glibc-debuginfo-common-2.17-79.el7_1.x86_64.rpm glibc-static-2.17-79.el7_1.i686.rpm glibc-static-2.17-79.el7_1.x86_64.rpm Red Hat Enterprise Linux Server EUS (v. 7.1): Source: glibc-2.17-79.el7_1.src.rpm ppc64: glibc-2.17-79.el7_1.ppc.rpm glibc-2.17-79.el7_1.ppc64.rpm glibc-common-2.17-79.el7_1.ppc64.rpm glibc-debuginfo-2.17-79.el7_1.ppc.rpm glibc-debuginfo-2.17-79.el7_1.ppc64.rpm glibc-debuginfo-common-2.17-79.el7_1.ppc.rpm glibc-debuginfo-common-2.17-79.el7_1.ppc64.rpm glibc-devel-2.17-79.el7_1.ppc.rpm glibc-devel-2.17-79.el7_1.ppc64.rpm glibc-headers-2.17-79.el7_1.ppc64.rpm glibc-utils-2.17-79.el7_1.ppc64.rpm nscd-2.17-79.el7_1.ppc64.rpm s390x: glibc-2.17-79.el7_1.s390.rpm glibc-2.17-79.el7_1.s390x.rpm glibc-common-2.17-79.el7_1.s390x.rpm glibc-debuginfo-2.17-79.el7_1.s390.rpm glibc-debuginfo-2.17-79.el7_1.s390x.rpm glibc-debuginfo-common-2.17-79.el7_1.s390.rpm glibc-debuginfo-common-2.17-79.el7_1.s390x.rpm glibc-devel-2.17-79.el7_1.s390.rpm glibc-devel-2.17-79.el7_1.s390x.rpm glibc-headers-2.17-79.el7_1.s390x.rpm glibc-utils-2.17-79.el7_1.s390x.rpm nscd-2.17-79.el7_1.s390x.rpm x86_64: glibc-2.17-79.el7_1.i686.rpm glibc-2.17-79.el7_1.x86_64.rpm glibc-common-2.17-79.el7_1.x86_64.rpm glibc-debuginfo-2.17-79.el7_1.i686.rpm glibc-debuginfo-2.17-79.el7_1.x86_64.rpm glibc-debuginfo-common-2.17-79.el7_1.i686.rpm glibc-debuginfo-common-2.17-79.el7_1.x86_64.rpm glibc-devel-2.17-79.el7_1.i686.rpm glibc-devel-2.17-79.el7_1.x86_64.rpm glibc-headers-2.17-79.el7_1.x86_64.rpm glibc-utils-2.17-79.el7_1.x86_64.rpm nscd-2.17-79.el7_1.x86_64.rpm Red Hat Enterprise Linux Server EUS (v. 7.1): Source: glibc-2.17-79.ael7b_1.src.rpm ppc64le: glibc-2.17-79.ael7b_1.ppc64le.rpm glibc-common-2.17-79.ael7b_1.ppc64le.rpm glibc-debuginfo-2.17-79.ael7b_1.ppc64le.rpm glibc-debuginfo-common-2.17-79.ael7b_1.ppc64le.rpm glibc-devel-2.17-79.ael7b_1.ppc64le.rpm glibc-headers-2.17-79.ael7b_1.ppc64le.rpm glibc-utils-2.17-79.ael7b_1.ppc64le.rpm nscd-2.17-79.ael7b_1.ppc64le.rpm Red Hat Enterprise Linux Server Optional EUS (v. 7.1): ppc64: glibc-debuginfo-2.17-79.el7_1.ppc.rpm glibc-debuginfo-2.17-79.el7_1.ppc64.rpm glibc-debuginfo-common-2.17-79.el7_1.ppc.rpm glibc-debuginfo-common-2.17-79.el7_1.ppc64.rpm glibc-static-2.17-79.el7_1.ppc.rpm glibc-static-2.17-79.el7_1.ppc64.rpm s390x: glibc-debuginfo-2.17-79.el7_1.s390.rpm glibc-debuginfo-2.17-79.el7_1.s390x.rpm glibc-debuginfo-common-2.17-79.el7_1.s390.rpm glibc-debuginfo-common-2.17-79.el7_1.s390x.rpm glibc-static-2.17-79.el7_1.s390.rpm glibc-static-2.17-79.el7_1.s390x.rpm x86_64: glibc-debuginfo-2.17-79.el7_1.i686.rpm glibc-debuginfo-2.17-79.el7_1.x86_64.rpm glibc-debuginfo-common-2.17-79.el7_1.i686.rpm glibc-debuginfo-common-2.17-79.el7_1.x86_64.rpm glibc-static-2.17-79.el7_1.i686.rpm glibc-static-2.17-79.el7_1.x86_64.rpm Red Hat Enterprise Linux Server Optional EUS (v. 7.1): ppc64le: glibc-debuginfo-2.17-79.ael7b_1.ppc64le.rpm glibc-debuginfo-common-2.17-79.ael7b_1.ppc64le.rpm glibc-static-2.17-79.ael7b_1.ppc64le.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/ 7. References: https://access.redhat.com/security/cve/CVE-2013-7423 https://access.redhat.com/security/cve/CVE-2015-1472 https://access.redhat.com/security/cve/CVE-2015-1473 https://access.redhat.com/security/cve/CVE-2015-1781 https://access.redhat.com/security/cve/CVE-2015-5277 https://access.redhat.com/security/updates/classification/#important 8. Contact: The Red Hat security contact is . More contact details at https://access.redhat.com/security/team/contact/ Copyright 2015 Red Hat, Inc. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iD8DBQFWaAjFXlSAg2UNWIIRAqokAKC0aLqDf57HbtwD3FAwRH36DkG2bwCgpiHu dnRSyot5nK1GdxiUPgMF99E= =aoOW -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://www.redhat.com/mailman/listinfo/rhsa-announce