RHEA-2015:1374 - Product Enhancement Advisory

Topic

Updated pcre packages that add one enhancement are now available for Red Hat
Enterprise Linux 6.

Description

PCRE is a Perl-compatible regular expression library.

This update adds the following enhancement:

• To allow the grep utility to recover from PCRE matching failures if the binary

file is not a valid UTF-8 sequence, the following features have been backported
to the PCRE library:

• The pcre_exec() function now checks for out-of-range starting offset values

and reports PCRE_ERROR_BADOFFSET errors instead of reporting PCRE_ERROR_NOMATCH
errors or looping infinitely.

• If the pcre_exec() function is called to perform a UTF-8 match on an invalid

UTF-8 subject string and the ovector array argument is large enough, the offset
of the first subject string in the invalid UTF-8 byte, as well as the detailed
reason code, are returned in the ovector array element. In addition, the
"pcretest" utility can now be used to display these details. Note that with this
update, the pcre_compile() function reports first invalid UTF-8 byte instead of
the last byte.

Also note that the signature of the pcre_valid_utf8() function, which is not
intended for public use, has been changed. Finally, note that "pcretest" now
appends human-readable error messages to error codes. (BZ#1193524)

Users of pcre are advised to upgrade to these updated packages, which add this
enhancement.

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 6 x86_64
• Red Hat Enterprise Linux Server 6 i386
• Red Hat Enterprise Linux Workstation 6 x86_64
• Red Hat Enterprise Linux Workstation 6 i386
• Red Hat Enterprise Linux Desktop 6 i386
• Red Hat Enterprise Linux for IBM z Systems 6 s390x
• Red Hat Enterprise Linux for Power, big endian 6 ppc64
• Red Hat Enterprise Linux for Scientific Computing 6 x86_64
• Red Hat Enterprise Linux Server from RHUI 6 x86_64
• Red Hat Enterprise Linux Server from RHUI 6 i386
• Red Hat Enterprise Linux Server - Extended Life Cycle Support 6 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support 6 i386
• Red Hat Enterprise Linux Desktop 6 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support (for IBM z Systems) 6 s390x
• Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension 6 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension 6 i386
• Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension (for IBM z Systems) 6 s390x

Fixes

• BZ - 1193524 - Backport features required by grep: PCRE_ERROR_BADOFFSET, error details in case of PCRE_ERROR_BADUTF8

CVEs

(none)

References

(none)