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CVE-2007-1521

MediumPublished

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...

Published: Mar 20, 2007
Updated: Aug 7, 2024
Assigning CNA: mitre
Evidence observed: Mar 14, 2007

Primary CVSS

6.8/ 10Medium

nvd · CVSS 2.0

AV:N/AC:M/Au:N/C:P/I:P/A:P

EPSS probability estimate

8.5%

Low · next 30 days

Percentile: 94.9%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

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.

Sources

PHP 5.2.1 - 'session_regenerate_id()' Double-FreeExploit
Stefan Esser · linux · Mar 14, 2007

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