Topic

Updated pcre packages that resolve several security issues are now
available for Red Hat Enterprise Linux 4.

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

Description

PCRE is a Perl-compatible regular expression library.

Flaws were discovered 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 have been possible to run
arbitrary code as the user running the application.
(CVE-2006-7225, CVE-2006-7226, CVE-2006-7228, CVE-2006-7230, CVE-2007-1659)

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

Red Hat would like to thank Ludwig Nussel for reporting these issues.

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

Affected Products

• Red Hat Enterprise Linux Server 4 x86_64
• Red Hat Enterprise Linux Server 4 ia64
• Red Hat Enterprise Linux Server 4 i386
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 4.6 x86_64
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 4.6 ia64
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 4.6 i386
• Red Hat Enterprise Linux Workstation 4 x86_64
• Red Hat Enterprise Linux Workstation 4 ia64
• Red Hat Enterprise Linux Workstation 4 i386
• Red Hat Enterprise Linux Desktop 4 x86_64
• Red Hat Enterprise Linux Desktop 4 i386
• Red Hat Enterprise Linux for IBM z Systems 4 s390x
• Red Hat Enterprise Linux for IBM z Systems 4 s390
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 4.6 s390x
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 4.6 s390
• Red Hat Enterprise Linux for Power, big endian 4 ppc
• Red Hat Enterprise Linux for Power, big endian - Extended Update Support 4.6 ppc

Fixes

• BZ - 315871 - CVE-2007-1659 pcre regular expression flaws
• BZ - 383371 - CVE-2006-7228 pcre integer overflow
• BZ - 384761 - CVE-2006-7225 pcre miscalculation of memory requirements for malformed Posix character class
• BZ - 384781 - CVE-2006-7226 pcre miscalculation of memory requirements for repeated subpattern containing a named recursion or subroutine reference
• BZ - 384801 - CVE-2006-7230 pcre miscalculation of memory requirements if options are changed during pattern compilation

CVEs

• CVE-2007-1659
• CVE-2006-7230
• CVE-2006-7228
• CVE-2006-7226
• CVE-2006-7225

References

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