RHSA-2006:0568 - Security Advisory

Topic

Updated PHP packages that fix multiple security issues are now available
for Red Hat Enterprise Linux 3 and 4.

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

Description

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

A directory traversal vulnerability was found in PHP. Local users could
bypass open_basedir restrictions allowing remote attackers to create files
in arbitrary directories via the tempnam() function. (CVE-2006-1494)

The wordwrap() PHP function did not properly check for integer overflow in
the handling of the "break" parameter. An attacker who could control the
string passed to the "break" parameter could cause a heap overflow.
(CVE-2006-1990)

A flaw was found in the zend_hash_del() PHP function. For PHP scripts that
rely on the use of the unset() function, a remote attacker could force
variable initialization to be bypassed. This would be a security issue
particularly for installations that enable the "register_globals" setting.
"register_globals" is disabled by default in Red Hat Enterprise Linux.
(CVE-2006-3017)

Users of PHP should upgrade to these updated packages, which contain
backported patches that resolve these issues.

Solution

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

This update is available via Red Hat Network. To use Red Hat Network,
launch the Red Hat Update Agent with the following command:

up2date

This will start an interactive process that will result in the appropriate
RPMs being upgraded on your system.

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 Server 3 x86_64
• Red Hat Enterprise Linux Server 3 ia64
• Red Hat Enterprise Linux Server 3 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 Workstation 3 x86_64
• Red Hat Enterprise Linux Workstation 3 ia64
• Red Hat Enterprise Linux Workstation 3 i386
• Red Hat Enterprise Linux Desktop 4 x86_64
• Red Hat Enterprise Linux Desktop 4 i386
• Red Hat Enterprise Linux Desktop 3 x86_64
• Red Hat Enterprise Linux Desktop 3 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 3 s390x
• Red Hat Enterprise Linux for IBM z Systems 3 s390
• Red Hat Enterprise Linux for Power, big endian 4 ppc
• Red Hat Enterprise Linux for Power, big endian 3 ppc

Fixes

• BZ - 189591 - CVE-2006-1494 PHP tempname open_basedir issue
• BZ - 190033 - CVE-2006-1990 wordwrap integer overflow
• BZ - 196256 - CVE-2006-3017 zend_hash_del bug

CVEs

• CVE-2006-1990
• CVE-2006-3017
• CVE-2006-1494

References

• http://www.php.net/register_globals
• http://www.redhat.com/security/updates/classification/#moderate