CVE-2007-1700

Severity: high (CVSS 7.5 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 9.1% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2007-03-27 · updated 2026-06-16

Description

The session extension in PHP 4 before 4.4.5, and PHP 5 before 5.2.1, calculates the reference count for the session variables without considering the internal pointer from the session globals, which allows context-dependent attackers to execute arbitrary code via a crafted string in the session_register after unsetting HTTP_SESSION_VARS and _SESSION, which destroys the session data Hashtable.

Affected products

PHP: 4.0, 4.0-beta_4_patch1, 4.0-beta1, 4.0-beta2, 4.0-beta3, 4.0-beta4 (+66)

References

http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?lang=en&cc=us&objectID=c01056506
http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?lang=en&cc=us&objectID=c01086137
http://secunia.com/advisories/25056
http://secunia.com/advisories/25057
http://secunia.com/advisories/25062
http://secunia.com/advisories/25423
http://secunia.com/advisories/25445
http://secunia.com/advisories/25850
http://security.gentoo.org/glsa/glsa-200705-19.xml
http://www.debian.org/security/2007/dsa-1283
http://www.novell.com/linux/security/advisories/2007_32_php.html
http://www.php-security.org/MOPB/MOPB-30-2007.html

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