-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ===================================================================== Red Hat Security Advisory Synopsis: Low: grep security, bug fix, and enhancement update Advisory ID: RHSA-2015:1447-01 Product: Red Hat Enterprise Linux Advisory URL: https://rhn.redhat.com/errata/RHSA-2015-1447.html Issue date: 2015-07-22 Updated on: 2015-01-29 CVE Names: CVE-2012-5667 CVE-2015-1345 ===================================================================== 1. Summary: Updated grep packages that fix two security issues, several bugs, and add various enhancements are now available for Red Hat Enterprise Linux 6. Red Hat Product Security has rated this update as having Low 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 Desktop (v. 6) - i386, x86_64 Red Hat Enterprise Linux HPC Node (v. 6) - x86_64 Red Hat Enterprise Linux Server (v. 6) - i386, ppc64, s390x, x86_64 Red Hat Enterprise Linux Workstation (v. 6) - i386, x86_64 3. Description: The grep utility searches through textual input for lines that contain a match to a specified pattern and then prints the matching lines. The GNU grep utilities include grep, egrep, and fgrep. An integer overflow flaw, leading to a heap-based buffer overflow, was found in the way grep parsed large lines of data. An attacker able to trick a user into running grep on a specially crafted data file could use this flaw to crash grep or, potentially, execute arbitrary code with the privileges of the user running grep. (CVE-2012-5667) A heap-based buffer overflow flaw was found in the way grep processed certain pattern and text combinations. An attacker able to trick a user into running grep on specially crafted input could use this flaw to crash grep or, potentially, read from uninitialized memory. (CVE-2015-1345) The grep packages have been upgraded to upstream version 2.20, which provides a number of bug fixes and enhancements over the previous version. Notably, the speed of various operations has been improved significantly. Now, the recursive grep utility uses the fts function of the gnulib library for directory traversal, so that it can handle much larger directories without reporting the "File name too long" error message, and it can operate faster when dealing with large directory hierarchies. (BZ#982215, BZ#1064668, BZ#1126757, BZ#1167766, BZ#1171806) This update also fixes the following bugs: * Prior to this update, the \w and \W symbols were inconsistently matched to the [:alnum:] character class. Consequently, regular expressions that used \w and \W in some cases had incorrect results. An upstream patch which fixes the matching problem has been applied, and \w is now matched to the [_[:alnum:]] character and \W to the [^_[:alnum:]] character consistently. (BZ#799863) * Previously, the "--fixed-regexp" command-line option was not included in the grep(1) manual page. Consequently, the manual page was inconsistent with the built-in help of the grep utility. To fix this bug, grep(1) has been updated to include a note informing the user that "--fixed-regexp" is an obsolete option. Now, the built-in help and manual page are consistent regarding the "--fixed-regexp" option. (BZ#1103270) * Previously, the Perl Compatible Regular Expression (PCRE) library did not work correctly when matching non-UTF-8 text in UTF-8 mode. Consequently, an error message about invalid UTF-8 byte sequence characters was returned. To fix this bug, patches from upstream have been applied to the PCRE library and the grep utility. As a result, PCRE now skips non-UTF-8 characters as non-matching text without returning any error message. (BZ#1193030) All grep users are advised to upgrade to these updated packages, which correct these issues and add these enhancements. 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/): 799863 - inconsistent \w and [[:alnum:]] behaviour 889935 - CVE-2012-5667 grep: Integer overflow leading to heap-based buffer-overflow when reading large lines 982215 - word boundary error near an utf8 character 1103270 - undocumented option --fixed-regexp 1167766 - grep Abandons (with core dump in some systems) when invoked with recurse and perl switches 1171806 - grep matches lowercase when only searching for uppercase range 1183651 - CVE-2015-1345 grep: heap buffer overrun 6. Package List: Red Hat Enterprise Linux Desktop (v. 6): Source: grep-2.20-3.el6.src.rpm i386: grep-2.20-3.el6.i686.rpm grep-debuginfo-2.20-3.el6.i686.rpm x86_64: grep-2.20-3.el6.x86_64.rpm grep-debuginfo-2.20-3.el6.x86_64.rpm Red Hat Enterprise Linux HPC Node (v. 6): Source: grep-2.20-3.el6.src.rpm x86_64: grep-2.20-3.el6.x86_64.rpm grep-debuginfo-2.20-3.el6.x86_64.rpm Red Hat Enterprise Linux Server (v. 6): Source: grep-2.20-3.el6.src.rpm i386: grep-2.20-3.el6.i686.rpm grep-debuginfo-2.20-3.el6.i686.rpm ppc64: grep-2.20-3.el6.ppc64.rpm grep-debuginfo-2.20-3.el6.ppc64.rpm s390x: grep-2.20-3.el6.s390x.rpm grep-debuginfo-2.20-3.el6.s390x.rpm x86_64: grep-2.20-3.el6.x86_64.rpm grep-debuginfo-2.20-3.el6.x86_64.rpm Red Hat Enterprise Linux Workstation (v. 6): Source: grep-2.20-3.el6.src.rpm i386: grep-2.20-3.el6.i686.rpm grep-debuginfo-2.20-3.el6.i686.rpm x86_64: grep-2.20-3.el6.x86_64.rpm grep-debuginfo-2.20-3.el6.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/ 7. References: https://access.redhat.com/security/cve/CVE-2012-5667 https://access.redhat.com/security/cve/CVE-2015-1345 https://access.redhat.com/security/updates/classification/#low 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 iD8DBQFVrzdZXlSAg2UNWIIRAj2EAJ4j6tghq1ELtqNIxJohjpJZVSfBVACfQcMc hXM2QBvvG/zZmzSGXqdoLWQ= =Ae4W -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://www.redhat.com/mailman/listinfo/rhsa-announce