PHP: Multiple vulnerabilities — GLSA 200703-21

PHP contains several vulnerabilities including a heap buffer overflow, potentially leading to the remote execution of arbitrary code under certain conditions.

Affected Packages

dev-lang/php on all architectures
Affected versions < 5.2.1-r3
Unaffected versions >= 5.2.1-r3, revision >= 5.1.6-r11, revision >= 4.4.6, revision >= 4.4.7, revision >= 4.4.8_pre20070816

Background

PHP is a widely-used general-purpose scripting language that is especially suited for Web development and can be embedded into HTML.

Description

Several vulnerabilities were found in PHP by the Hardened-PHP Project and other researchers. These vulnerabilities include a heap-based buffer overflow in htmlentities() and htmlspecialchars() if called with UTF-8 parameters, and an off-by-one error in str_ireplace(). Other vulnerabilities were also found in the PHP4 branch, including possible overflows, stack corruptions and a format string vulnerability in the *print() functions on 64 bit systems.

Impact

Remote attackers might be able to exploit these issues in PHP applications making use of the affected functions, potentially resulting in the execution of arbitrary code, Denial of Service, execution of scripted contents in the context of the affected site, security bypass or information leak.

Workaround

There is no known workaround at this time.

Resolution

All PHP users should upgrade to the latest version:

 # emerge --sync
 # emerge --ask --oneshot --verbose "dev-lang/php"

References

Release Date
March 20, 2007

Latest Revision
March 29, 2008: 03

Severity
high

Exploitable
remote

Bugzilla entries