CVE-2007-1700
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.
Key facts
- CVSS score
- 7.5 (v2.0)
- Severity
- HIGH
- CVSS vector
AV:N/AC:L/Au:N/C:P/I:P/A:P- EPSS score
- 9.1% (95th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2007-1694)
- Published
- March 27, 2007
- NVD last modified
- June 16, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2007-1694 in the EU Vulnerability Database. Last updated in EUVD on August 7, 2024.
View on the EU Vulnerability DatabaseAffected products
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
and 22 more…
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
- http://www.securityfocus.com/bid/23119(Exploit)
- http://www.ubuntu.com/usn/usn-455-1
- http://www.vupen.com/english/advisories/2007/1991
- http://www.vupen.com/english/advisories/2007/2374
- https://exchange.xforce.ibmcloud.com/vulnerabilities/33520
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
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