RHBA-2015:2142 - Bug Fix Advisory

Topic

Updated pcre packages that fix several bugs are now available for Red Hat Enterprise Linux 7.

Description

PCRE is a Perl-compatible regular expression library.

This update fixes the following bugs:

• Previously, non-matched groups within capturing groups up to a forced match were not being properly reset by PCRE, causing the library to incorrectly match some groups. With this update, non-matched groups within capturing groups up to a forced match are being properly marked as non-matching. (BZ#1161597)
• Compiling zero-repeated groups with recursive back references no longer causes PCRE to crash. (BZ#1119356)
• A bug in PCRE was causing it to match the wrong substring in regular expressions with empty-matching possessive zero-repeat groups. This problem has been fixed and matching these groups now behaves as expected. (BZ#1119320)
• PCRE previously did not correctly evaluate regular expressions with literal quotations inside character class. For example, the expression "/[\Qa]\E]+/" was not matching the string "a", although it should. The problem has been fixed and regular expressions with literal quotations inside character class are now being evaluated correctly. (BZ#1111091)
• An error in first character optimization was causing PCRE to incorrectly evaluate regular expressions where a start-anchored character with more than once case follows circumflex in multi-line UTF-8 mode. This update resolves the problem and PCRE now properly evaluates these regular expressions. (BZ#1110621)
• Linking an application to the static PCRE library using the libpcre module for pkg-config was failing due to missing pthread symbols. The pkg-config modules for PCRE libraries have been updated to declare private libraries properly, and the "pkg-config --static --libs libpcre" command can now be used to link the static pcre library to an application. (BZ#1217111)
• The pcredemo.c file, which is described in the pcresample(3) man page as containing code examples for PCRE, was missing from the pcre-devel package. The example file has been added to the pcre-devel package and can now be found in the /usr/share/doc/pcre-devel-8.32/ directory. (BZ#1217118)

Users of pcre are advised to upgrade to these updated packages, which fix these bugs.

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

Affected Products

• Red Hat Enterprise Linux Server 7 x86_64
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 7.7 x86_64
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 7.6 x86_64
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 7.5 x86_64
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 7.4 x86_64
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 7.3 x86_64
• Red Hat Enterprise Linux Server - AUS 7.7 x86_64
• Red Hat Enterprise Linux Server - AUS 7.6 x86_64
• Red Hat Enterprise Linux Server - AUS 7.4 x86_64
• Red Hat Enterprise Linux Server - AUS 7.3 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support 7 x86_64
• Red Hat Enterprise Linux Workstation 7 x86_64
• Red Hat Enterprise Linux Desktop 7 x86_64
• Red Hat Enterprise Linux for IBM z Systems 7 s390x
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 7.7 s390x
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 7.6 s390x
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 7.5 s390x
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 7.4 s390x
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 7.3 s390x
• Red Hat Enterprise Linux for Power, big endian 7 ppc64
• Red Hat Enterprise Linux for Power, big endian - Extended Update Support 7.7 ppc64
• Red Hat Enterprise Linux for Power, big endian - Extended Update Support 7.6 ppc64
• Red Hat Enterprise Linux for Power, big endian - Extended Update Support 7.5 ppc64
• Red Hat Enterprise Linux for Power, big endian - Extended Update Support 7.4 ppc64
• Red Hat Enterprise Linux for Power, big endian - Extended Update Support 7.3 ppc64
• Red Hat Enterprise Linux for Scientific Computing 7 x86_64
• Red Hat Enterprise Linux Server from RHUI 7 x86_64
• Red Hat Enterprise Linux for Power, little endian 7 ppc64le
• Red Hat Enterprise Linux for Power, little endian - Extended Update Support 7.7 ppc64le
• Red Hat Enterprise Linux for Power, little endian - Extended Update Support 7.6 ppc64le
• Red Hat Enterprise Linux for Power, little endian - Extended Update Support 7.5 ppc64le
• Red Hat Enterprise Linux for Power, little endian - Extended Update Support 7.4 ppc64le
• Red Hat Enterprise Linux for Power, little endian - Extended Update Support 7.3 ppc64le
• Red Hat Enterprise Linux for Power, little endian - Extended Update Support 7.2 ppc64le
• Red Hat Enterprise Linux Server - TUS 7.7 x86_64
• Red Hat Enterprise Linux Server - TUS 7.6 x86_64
• Red Hat Enterprise Linux Server - TUS 7.3 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support (for IBM z Systems) 7 s390x
• Red Hat Enterprise Linux EUS Compute Node 7.7 x86_64
• Red Hat Enterprise Linux EUS Compute Node 7.6 x86_64
• Red Hat Enterprise Linux EUS Compute Node 7.5 x86_64
• Red Hat Enterprise Linux EUS Compute Node 7.4 x86_64
• Red Hat Enterprise Linux EUS Compute Node 7.3 x86_64
• Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 7.7 ppc64le
• Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 7.6 ppc64le
• Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 7.4 ppc64le
• Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 7.3 ppc64le
• Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 7.7 x86_64
• Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 7.6 x86_64
• Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 7.4 x86_64
• Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 7.3 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support for IBM Power, big endian 7 ppc64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support for IBM Power, little endian 7 ppc64le

Fixes

• BZ - 1110621 - First character optimization bug for multi-line case insensitive UTF-8 match
• BZ - 1111091 - Character class with literal quotation is miscompiled
• BZ - 1119320 - Zero-minimum possessive groups does not match empty string in
• BZ - 1119356 - Wrong compilation of zero-repeated groups with recursive back reference can cause crash
• BZ - 1161597 - Capturing group offsets before forced match are not initialized
• BZ - 1217111 - add -pthread to pkg-config

CVEs

• CVE-2015-2327

References

• http://www.redhat.com/security/updates/classification/#normal