Description
Double free vulnerability in PHP before 4.4.7, and 5.x before 5.2.2, allows context-dependent attackers to execute arbitrary code by interrupting the session_regenerate_id function, as demonstrated by calling a userspace error handler or triggering a memory limit violation.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 5.0 | php4 | 6:4.4.4-9+lenny1 | DTSA-40-1 |
| Debian 5.0 | php5 | 5.2.0-10+lenny1 | DTSA-39-1 |
| Debian 4.0 | php4 | 6:4.4.4-8+etch2 | DSA-1282-1 |
| Debian 4.0 | php5 | 5.2.0-8+etch3 | DSA-1283-1 |
| Debian 3.1 | php4 | 4:4.3.10-20 | DSA-1282-1 |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
Exploit-DB 1
- PHP 5.2.1 - 'session_regenerate_id()' Double-Free EDB-3479 · local · Mar 14, 2007 · verified
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 4
- DTSA-40-1 php4 - several vulnerabilities Debian Security (DSA / DLA) · Mar 9, 2026
- DTSA-39-1 php5 - several vulnerabilities Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-1282-1 php4 Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-1283-1 php5 Debian Security (DSA / DLA) · Mar 9, 2026
References
- ADV-2007-0960 vdb-entry
- ADV-2007-2732 vdb-entry
- 25056 third-party-advisory
- DSA-1283 vendor-advisory
- 24505 third-party-advisory
- APPLE-SA-2007-07-31 vendor-advisory
- GLSA-200705-19 vendor-advisory
- http://us2.php.net/releases/4_4_7.php
- 25062 third-party-advisory
- USN-455-1 vendor-advisory
- DSA-1282 vendor-advisory
- http://us2.php.net/releases/5_2_2.php
- http://docs.info.apple.com/article.html?artnum=306172
- http://www.php-security.org/MOPB/MOPB-22-2007.html
- 25159 vdb-entry
- 25445 third-party-advisory
- 25057 third-party-advisory
- SUSE-SA:2007:032 vendor-advisory
- 25025 third-party-advisory
- 22968 vdb-entry
- 26235 third-party-advisory