RHSA-2009:0338 - Security Advisory

Topic

Updated php packages that fix several security issues are now available for
Red Hat Enterprise Linux 5.

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 heap-based buffer overflow flaw was found in PHP's mbstring extension. A
remote attacker able to pass arbitrary input to a PHP script using mbstring
conversion functions could cause the PHP interpreter to crash or,
possibly, execute arbitrary code. (CVE-2008-5557)

A flaw was found in the handling of the "mbstring.func_overload"
configuration setting. A value set for one virtual host, or in a user's
.htaccess file, was incorrectly applied to other virtual hosts on the same
server, causing the handling of multibyte character strings to not work
correctly. (CVE-2009-0754)

A buffer overflow flaw was found in PHP's imageloadfont function. If a PHP
script allowed a remote attacker to load a carefully crafted font file, it
could cause the PHP interpreter to crash or, possibly, execute arbitrary
code. (CVE-2008-3658)

A flaw was found in the way PHP handled certain file extensions when
running in FastCGI mode. If the PHP interpreter was being executed via
FastCGI, a remote attacker could create a request which would cause the PHP
interpreter to crash. (CVE-2008-3660)

A memory disclosure flaw was found in the PHP gd extension's imagerotate
function. A remote attacker able to pass arbitrary values as the
"background color" argument of the function could, possibly, view portions
of the PHP interpreter's memory. (CVE-2008-5498)

A cross-site scripting flaw was found in a way PHP reported errors for
invalid cookies. If the PHP interpreter had "display_errors" enabled, a
remote attacker able to set a specially-crafted cookie on a victim's system
could possibly inject arbitrary HTML into an error message generated by
PHP. (CVE-2008-5814)

All php users are advised to upgrade to these updated packages, which
contain backported patches to resolve these issues. The httpd web server
must be restarted for the changes to take effect.

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/docs/DOC-11259

Affected Products

• Red Hat Enterprise Linux Server 5 x86_64
• Red Hat Enterprise Linux Server 5 ia64
• Red Hat Enterprise Linux Server 5 i386
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 5.3 x86_64
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 5.3 ia64
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 5.3 i386
• Red Hat Enterprise Linux Server - AUS 5.3 x86_64
• Red Hat Enterprise Linux Server - AUS 5.3 ia64
• Red Hat Enterprise Linux Server - AUS 5.3 i386
• Red Hat Enterprise Linux Workstation 5 x86_64
• Red Hat Enterprise Linux Workstation 5 i386
• Red Hat Enterprise Linux for IBM z Systems 5 s390x
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 5.3 s390x
• Red Hat Enterprise Linux for Power, big endian 5 ppc
• Red Hat Enterprise Linux for Power, big endian - Extended Update Support 5.3 ppc
• Red Hat Enterprise Linux Server from RHUI 5 x86_64
• Red Hat Enterprise Linux Server from RHUI 5 i386

Fixes

• BZ - 459529 - CVE-2008-3658 php: buffer overflow in the imageloadfont function in gd extension
• BZ - 459572 - CVE-2008-3660 php: FastCGI module DoS via multiple dots preceding the extension
• BZ - 478425 - CVE-2008-5498 php: libgd imagerotate() array index error memory disclosure
• BZ - 478848 - CVE-2008-5557 php: Heap-based buffer overflow in the mbstring extension via crafted string containing a HTML entity (arb code execution)
• BZ - 479272 - CVE-2009-0754 PHP mbstring.func_overload web server denial of service
• BZ - 480167 - CVE-2008-5814 php: XSS via PHP error messages

CVEs

• CVE-2008-3660
• CVE-2008-3658
• CVE-2009-0754
• CVE-2008-5557
• CVE-2008-5498
• CVE-2008-5814

References

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