RHSA-2006:0688 - Security Advisory

Topic

Updated PHP packages that fix multiple security issues are now available
for the Red Hat Application Stack.

This update has been rated as having important 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.

An integer overflow was discovered in the PHP memory handling routines. If
a script can cause memory allocation based on untrusted user data, a remote
attacker sending a carefully crafted request could execute arbitrary code
as the 'apache' user. (CVE-2006-4812)

A buffer overflow was discovered in the PHP sscanf() function. If a script
used the sscanf() function with positional arguments in the format string,
a remote attacker sending a carefully crafted request could execute
arbitrary code as the 'apache' user. (CVE-2006-4020)

An integer overflow was discovered in the PHP wordwrap() and str_repeat()
functions. If a script running on a 64-bit server used either of these
functions on untrusted user data, a remote attacker sending a carefully
crafted request might be able to cause a heap overflow. (CVE-2006-4482)

A buffer overflow was discovered in the PHP gd extension. If a script was
set up to process GIF images from untrusted sources using the gd extension,
a remote attacker could cause a heap overflow. (CVE-2006-4484)

A buffer overread was discovered in the PHP stripos() function. If a
script used the stripos() function with untrusted user data, PHP may read
past the end of a buffer, which could allow a denial of service attack by a
remote user. (CVE-2006-4485)

An integer overflow was discovered in the PHP memory allocation handling.
On 64-bit platforms, the "memory_limit" setting was not enforced correctly,
which could allow a denial of service attack by a remote user. (CVE-2006-4486)

These packages also contain a fix for a bug where certain input strings to
the metaphone() function could cause memory corruption.

Users of PHP should upgrade to these updated packages, which contain
backported patches to correct 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 Application Stack 1 1 x86_64
• Red Hat Application Stack 1 1 i386

Fixes

• BZ - 207090 - CVE-2006-4020 PHP security issues (CVE-2006-4482 CVE-2006-4484 CVE-2006-4485 CVE-2006-4486)
• BZ - 209408 - CVE-2006-4812 PHP ecalloc integer overflow

CVEs

• CVE-2006-4812
• CVE-2006-4485
• CVE-2006-4484
• CVE-2006-4482
• CVE-2006-4486
• CVE-2006-4020

References

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