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Category:   Application (Generic)  >   PCRE Vendors:   pcre.org
(Red Hat Issues Fix) PCRE Regex Processing Bugs May Let Users Execute Arbitrary Code
SecurityTracker Alert ID:  1018898
SecurityTracker URL:  http://securitytracker.com/id/1018898
CVE Reference:   CVE-2007-1660   (Links to External Site)
Date:  Nov 6 2007
Impact:   Execution of arbitrary code via local system, Execution of arbitrary code via network, User access via local system, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): prior to 7.0
Description:   Two vulnerabilities were reported in PCRE. A local or remote user can execute arbitrary code on the target system.

A remote or local user may be able to supply a specially crafted regular expression to trigger a memory in PCRE.

The impact depends on the application that uses the library. Applications that parse untrusted regular expressions may be vulnerable.

Unmatched \Q\E sequences with orphan \E codes can cause code execution [CVE-2007-1659].

Certain character classes can trigger code execution [CVE-2007-1660].

Tavis Ormandy reported these vulnerabilities.
Impact:   A local or remote user can execute arbitrary code on the target system.
Solution:   Red Hat has released a fix for CVE-2007-1660.

The Red Hat advisory is available at:

https://rhn.redhat.com/errata/RHSA-2007-0968.html
Vendor URL:  www.pcre.org/ (Links to External Site)
Cause:   Access control error, State error
Underlying OS:   Linux (Red Hat Enterprise)

Message History:   This archive entry is a follow-up to the message listed below.
Nov 6 2007 PCRE Regex Processing Bugs May Let Users Execute Arbitrary Code


 Source Message Contents
Date:  Mon, 5 Nov 2007 11:44:20 -0500
Subject:  [RHSA-2007:0968-01] Critical: pcre security update


-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

- ---------------------------------------------------------------------
                   Red Hat Security Advisory

Synopsis:          Critical: pcre security update
Advisory ID:       RHSA-2007:0968-01
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2007-0968.html
Issue date:        2007-11-05
Updated on:        2007-11-05
Product:           Red Hat Enterprise Linux
CVE Names:         CVE-2007-1660 
- ---------------------------------------------------------------------

1. Summary:

Updated pcre packages that correct two security flaws are now available for
Red Hat Enterprise Linux 4.

This update has been rated as having critical security impact by the Red
Hat Security Response Team.

2. Relevant releases/architectures:

Red Hat Enterprise Linux AS version 4 - i386, ia64, ppc, s390, s390x, x86_64
Red Hat Enterprise Linux Desktop version 4 - i386, x86_64
Red Hat Enterprise Linux ES version 4 - i386, ia64, x86_64
Red Hat Enterprise Linux WS version 4 - i386, ia64, x86_64

3. Problem description:

PCRE is a Perl-compatible regular expression library.

Multiple flaws were found in the way pcre handles certain malformed regular
expressions. If an application linked against pcre, such as Konqueror,
parses a malicious regular expression, it may be possible to run arbitrary
code as the user running the application. (CVE-2007-1660)

Users of pcre are advised to upgrade to these updated packages, which
contain backported patches to correct these issues.

Red Hat would like to thank Tavis Ormandy and Will Drewry for properly
disclosing these issues.

4. Solution:

Before applying this update, make sure that all previously-released
errata relevant to your system have been applied.  

This update is available via Red Hat Network.  Details on how to use 
the Red Hat Network to apply this update are available at
http://kbase.redhat.com/faq/FAQ_58_10188

5. Bug IDs fixed (http://bugzilla.redhat.com/):

315881 - CVE-2007-1660 pcre regular expression flaws

6. RPMs required:

Red Hat Enterprise Linux AS version 4:

SRPMS:
ftp://updates.redhat.com/enterprise/4AS/en/os/SRPMS/pcre-4.5-4.el4_5.1.src.rpm
d2bf1a695fbb25449e583dcdf1c2adc3  pcre-4.5-4.el4_5.1.src.rpm

i386:
170f0f43d5605415c654ccbec4272b76  pcre-4.5-4.el4_5.1.i386.rpm
32650c48544f61597d23051c343419a9  pcre-debuginfo-4.5-4.el4_5.1.i386.rpm
25e5f95b21f055328b7f223b82682c18  pcre-devel-4.5-4.el4_5.1.i386.rpm

ia64:
170f0f43d5605415c654ccbec4272b76  pcre-4.5-4.el4_5.1.i386.rpm
09735dc1d899a27490fbaefbf801e453  pcre-4.5-4.el4_5.1.ia64.rpm
32650c48544f61597d23051c343419a9  pcre-debuginfo-4.5-4.el4_5.1.i386.rpm
b9fd1bfce2d9c0761b0610ddde2c1607  pcre-debuginfo-4.5-4.el4_5.1.ia64.rpm
3e3c83e3a8c1b28b1d5d5a3e2efbf8f0  pcre-devel-4.5-4.el4_5.1.ia64.rpm

ppc:
39ceb7698118cfb31004434f6ce39e2f  pcre-4.5-4.el4_5.1.ppc.rpm
7a66762a3067ff36eb141d50e2f178c2  pcre-4.5-4.el4_5.1.ppc64.rpm
9db9c301f7ec374a635ec959b4446510  pcre-debuginfo-4.5-4.el4_5.1.ppc.rpm
1ddcaf1d63b2ad06ba199867e910c3f6  pcre-debuginfo-4.5-4.el4_5.1.ppc64.rpm
27c02138dc61651befd584d7564e87c1  pcre-devel-4.5-4.el4_5.1.ppc.rpm

s390:
d29fff61e69fc677350e8dce17f6dc2d  pcre-4.5-4.el4_5.1.s390.rpm
6e4505ff2cab4ef9623efba1301bb291  pcre-debuginfo-4.5-4.el4_5.1.s390.rpm
f17dc61991ff18330387a01022878cd1  pcre-devel-4.5-4.el4_5.1.s390.rpm

s390x:
d29fff61e69fc677350e8dce17f6dc2d  pcre-4.5-4.el4_5.1.s390.rpm
233bf6ee5aab5c1394589b35e0a240ac  pcre-4.5-4.el4_5.1.s390x.rpm
6e4505ff2cab4ef9623efba1301bb291  pcre-debuginfo-4.5-4.el4_5.1.s390.rpm
4b712a174827d3aa67cfaf73ab583114  pcre-debuginfo-4.5-4.el4_5.1.s390x.rpm
43b1cdaf5aba84efc34b6219a411e1c8  pcre-devel-4.5-4.el4_5.1.s390x.rpm

x86_64:
170f0f43d5605415c654ccbec4272b76  pcre-4.5-4.el4_5.1.i386.rpm
96c23c6f94616735252c926308bd5037  pcre-4.5-4.el4_5.1.x86_64.rpm
32650c48544f61597d23051c343419a9  pcre-debuginfo-4.5-4.el4_5.1.i386.rpm
8495cf879c626cb9e9d661cc472ebb0a  pcre-debuginfo-4.5-4.el4_5.1.x86_64.rpm
91ace1c63dd58660bd06673252f992d7  pcre-devel-4.5-4.el4_5.1.x86_64.rpm

Red Hat Enterprise Linux Desktop version 4:

SRPMS:
ftp://updates.redhat.com/enterprise/4Desktop/en/os/SRPMS/pcre-4.5-4.el4_5.1.src.rpm
d2bf1a695fbb25449e583dcdf1c2adc3  pcre-4.5-4.el4_5.1.src.rpm

i386:
170f0f43d5605415c654ccbec4272b76  pcre-4.5-4.el4_5.1.i386.rpm
32650c48544f61597d23051c343419a9  pcre-debuginfo-4.5-4.el4_5.1.i386.rpm
25e5f95b21f055328b7f223b82682c18  pcre-devel-4.5-4.el4_5.1.i386.rpm

x86_64:
170f0f43d5605415c654ccbec4272b76  pcre-4.5-4.el4_5.1.i386.rpm
96c23c6f94616735252c926308bd5037  pcre-4.5-4.el4_5.1.x86_64.rpm
32650c48544f61597d23051c343419a9  pcre-debuginfo-4.5-4.el4_5.1.i386.rpm
8495cf879c626cb9e9d661cc472ebb0a  pcre-debuginfo-4.5-4.el4_5.1.x86_64.rpm
91ace1c63dd58660bd06673252f992d7  pcre-devel-4.5-4.el4_5.1.x86_64.rpm

Red Hat Enterprise Linux ES version 4:

SRPMS:
ftp://updates.redhat.com/enterprise/4ES/en/os/SRPMS/pcre-4.5-4.el4_5.1.src.rpm
d2bf1a695fbb25449e583dcdf1c2adc3  pcre-4.5-4.el4_5.1.src.rpm

i386:
170f0f43d5605415c654ccbec4272b76  pcre-4.5-4.el4_5.1.i386.rpm
32650c48544f61597d23051c343419a9  pcre-debuginfo-4.5-4.el4_5.1.i386.rpm
25e5f95b21f055328b7f223b82682c18  pcre-devel-4.5-4.el4_5.1.i386.rpm

ia64:
170f0f43d5605415c654ccbec4272b76  pcre-4.5-4.el4_5.1.i386.rpm
09735dc1d899a27490fbaefbf801e453  pcre-4.5-4.el4_5.1.ia64.rpm
32650c48544f61597d23051c343419a9  pcre-debuginfo-4.5-4.el4_5.1.i386.rpm
b9fd1bfce2d9c0761b0610ddde2c1607  pcre-debuginfo-4.5-4.el4_5.1.ia64.rpm
3e3c83e3a8c1b28b1d5d5a3e2efbf8f0  pcre-devel-4.5-4.el4_5.1.ia64.rpm

x86_64:
170f0f43d5605415c654ccbec4272b76  pcre-4.5-4.el4_5.1.i386.rpm
96c23c6f94616735252c926308bd5037  pcre-4.5-4.el4_5.1.x86_64.rpm
32650c48544f61597d23051c343419a9  pcre-debuginfo-4.5-4.el4_5.1.i386.rpm
8495cf879c626cb9e9d661cc472ebb0a  pcre-debuginfo-4.5-4.el4_5.1.x86_64.rpm
91ace1c63dd58660bd06673252f992d7  pcre-devel-4.5-4.el4_5.1.x86_64.rpm

Red Hat Enterprise Linux WS version 4:

SRPMS:
ftp://updates.redhat.com/enterprise/4WS/en/os/SRPMS/pcre-4.5-4.el4_5.1.src.rpm
d2bf1a695fbb25449e583dcdf1c2adc3  pcre-4.5-4.el4_5.1.src.rpm

i386:
170f0f43d5605415c654ccbec4272b76  pcre-4.5-4.el4_5.1.i386.rpm
32650c48544f61597d23051c343419a9  pcre-debuginfo-4.5-4.el4_5.1.i386.rpm
25e5f95b21f055328b7f223b82682c18  pcre-devel-4.5-4.el4_5.1.i386.rpm

ia64:
170f0f43d5605415c654ccbec4272b76  pcre-4.5-4.el4_5.1.i386.rpm
09735dc1d899a27490fbaefbf801e453  pcre-4.5-4.el4_5.1.ia64.rpm
32650c48544f61597d23051c343419a9  pcre-debuginfo-4.5-4.el4_5.1.i386.rpm
b9fd1bfce2d9c0761b0610ddde2c1607  pcre-debuginfo-4.5-4.el4_5.1.ia64.rpm
3e3c83e3a8c1b28b1d5d5a3e2efbf8f0  pcre-devel-4.5-4.el4_5.1.ia64.rpm

x86_64:
170f0f43d5605415c654ccbec4272b76  pcre-4.5-4.el4_5.1.i386.rpm
96c23c6f94616735252c926308bd5037  pcre-4.5-4.el4_5.1.x86_64.rpm
32650c48544f61597d23051c343419a9  pcre-debuginfo-4.5-4.el4_5.1.i386.rpm
8495cf879c626cb9e9d661cc472ebb0a  pcre-debuginfo-4.5-4.el4_5.1.x86_64.rpm
91ace1c63dd58660bd06673252f992d7  pcre-devel-4.5-4.el4_5.1.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://www.redhat.com/security/team/key/#package

7. References:

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-1660
http://www.redhat.com/security/updates/classification/#critical

8. Contact:

The Red Hat security contact is <secalert@redhat.com>.  More contact
details at https://www.redhat.com/security/team/contact/

Copyright 2007 Red Hat, Inc.
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