Synopsis: Low: grep security and bug fix update Advisory ID: SLSA-2015:2111-7 Issue Date: 2015-11-19 CVE Numbers: CVE-2015-1345 -- 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) 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, using regular expressions with "\w" and "\W" could lead to incorrect results. With this update, "\w" is consistently matched to the [_[:alnum:]] character, and "\W" is consistently matched to the [^_[:alnum:]] character. * Previously, the Perl Compatible Regular Expression (PCRE) matcher (selected by the "-P" parameter in grep) did not work correctly when matching non-UTF-8 text in UTF-8 locales. 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 grep utility. As a result, PCRE now skips non-UTF-8 characters as non-matching text without returning any error message. -- SL7 x86_64 grep-2.20-2.el7.x86_64.rpm grep-debuginfo-2.20-2.el7.x86_64.rpm - Scientific Linux Development Team