[RHSA-2015:2111-07] Low: grep security and bug fix update

[news 28]

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Red Hat Security Advisory

 

Synopsis: Low: grep security and bug fix update

Advisory ID: RHSA-2015:2111-07

Product: Red Hat Enterprise Linux

Advisory URL: https://rhn.redhat.com/errata/RHSA-2015-2111.html

Issue date: 2015-11-19

CVE Names: CVE-2015-1345

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1. Summary:

 

Updated grep packages that fix one security issue and several bugs are now

available for Red Hat Enterprise Linux 7.

 

Red Hat Product Security has rated this update as having Low security

impact. A Common Vulnerability Scoring System (CVSS) base score, which

gives a detailed severity rating, is available from the CVE link in the

References section.

 

2. Relevant releases/architectures:

 

Red Hat Enterprise Linux Client (v. 7) - x86_64

Red Hat Enterprise Linux ComputeNode (v. 7) - x86_64

Red Hat Enterprise Linux Server (v. 7) - aarch64, ppc64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux Workstation (v. 7) - 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.

 

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. (BZ#1159012)

 

* 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. (BZ#1217080)

 

All grep 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/):

 

1103259 - undocumented option --fixed-regexp

1159012 - inconsistent \w and [[:alnum:]] behaviour

1183651 - CVE-2015-1345 grep: heap buffer overrun

 

6. Package List:

 

Red Hat Enterprise Linux Client (v. 7):

 

Source:

grep-2.20-2.el7.src.rpm

 

x86_64:

grep-2.20-2.el7.x86_64.rpm

grep-debuginfo-2.20-2.el7.x86_64.rpm

 

Red Hat Enterprise Linux ComputeNode (v. 7):

 

Source:

grep-2.20-2.el7.src.rpm

 

x86_64:

grep-2.20-2.el7.x86_64.rpm

grep-debuginfo-2.20-2.el7.x86_64.rpm

 

Red Hat Enterprise Linux Server (v. 7):

 

Source:

grep-2.20-2.el7.src.rpm

 

aarch64:

grep-2.20-2.el7.aarch64.rpm

grep-debuginfo-2.20-2.el7.aarch64.rpm

 

ppc64:

grep-2.20-2.el7.ppc64.rpm

grep-debuginfo-2.20-2.el7.ppc64.rpm

 

ppc64le:

grep-2.20-2.el7.ppc64le.rpm

grep-debuginfo-2.20-2.el7.ppc64le.rpm

 

s390x:

grep-2.20-2.el7.s390x.rpm

grep-debuginfo-2.20-2.el7.s390x.rpm

 

x86_64:

grep-2.20-2.el7.x86_64.rpm

grep-debuginfo-2.20-2.el7.x86_64.rpm

 

Red Hat Enterprise Linux Workstation (v. 7):

 

Source:

grep-2.20-2.el7.src.rpm

 

x86_64:

grep-2.20-2.el7.x86_64.rpm

grep-debuginfo-2.20-2.el7.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-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.

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