CVE-2007-1286

MediumPublished

Integer overflow in PHP 4.4.4 and earlier allows remote context-dependent attackers to execute arbitrary code via a long string to the unserialize function,...

Published: Mar 6, 2007
Updated: Aug 7, 2024
Assigning CNA: mitre
Evidence observed: Mar 1, 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

40.9%

Moderate · next 30 days

Percentile: 98.6%
Model date: Oct 15, 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

Integer overflow in PHP 4.4.4 and earlier allows remote context-dependent attackers to execute arbitrary code via a long string to the unserialize function, which triggers the overflow in the ZVAL reference counter.

Sources

Repository evidence: Files: 1 · Repositories: 1

1 Module

PHP 4 unserialize() ZVAL Reference Counter Overflow (Cookie)Module
modules/exploits/multi/php/php_unserialize_zval_cookie.rb
Metasploit Framework modules
ExploitEvidence observed: Sep 26, 2026Revision: b22ce1fbae63Related tool
Declared conditions
- platform: Linux($.exploit_multi/php/php_unserialize_zval_cookie.platform)
- verification: check_declared($.exploit_multi/php/php_unserialize_zval_cookie.check)

PHP 4.4.4 - 'Unserialize()' ZVAL Reference Counter Overflow (PoC)Exploit
Stefan Esser · linux · Mar 2, 2007

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