RHSA-2011:0195 - Security Advisory

Topic

Updated php packages that fix multiple security issues are now available
for Red Hat Enterprise Linux 6.

The Red Hat Security Response Team has rated this update as having moderate
security impact. Common Vulnerability Scoring System (CVSS) base scores,
which give detailed severity ratings, are available for each vulnerability
from the CVE links in the References section.

Description

PHP is an HTML-embedded scripting language commonly used with the Apache
HTTP Server.

A flaw was found in the way PHP converted certain floating point values
from string representation to a number. If a PHP script evaluated an
attacker's input in a numeric context, the PHP interpreter could cause high
CPU usage until the script execution time limit is reached. This issue only
affected i386 systems. (CVE-2010-4645)

A numeric truncation error and an input validation flaw were found in the
way the PHP utf8_decode() function decoded partial multi-byte sequences
for some multi-byte encodings, sending them to output without them being
escaped. An attacker could use these flaws to perform a cross-site
scripting attack. (CVE-2009-5016, CVE-2010-3870)

A NULL pointer dereference flaw was found in the PHP
ZipArchive::getArchiveComment function. If a script used this function to
inspect a specially-crafted ZIP archive file, it could cause the PHP
interpreter to crash. (CVE-2010-3709)

All php users should upgrade to these updated packages, which contain
backported patches to resolve these issues. After installing the updated
packages, the httpd daemon must be restarted for the update to take effect.

Solution

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

This update is available via the Red Hat Network. Details on how to
use the Red Hat Network to apply this update are available at
http://kbase.redhat.com/faq/docs/DOC-11259

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 x86_64
• 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 Server - Extended Life Cycle Support (for IBM z Systems) 6 s390x

Fixes

• BZ - 649056 - CVE-2010-3870 php: XSS mitigation bypass via utf8_decode()
• BZ - 651206 - CVE-2010-3709 php: NULL pointer dereference in ZipArchive::getArchiveComment
• BZ - 652836 - CVE-2009-5016 php: XSS and SQL injection bypass via crafted overlong UTF-8 encoded string
• BZ - 667806 - CVE-2010-4645 php: hang on numeric value 2.2250738585072011e-308 with x87 fpu

CVEs

• CVE-2010-3870
• CVE-2009-5016
• CVE-2010-3709
• CVE-2010-4645

References

• https://access.redhat.com/security/updates/classification/#moderate