VYPR
← All advisories
Unrated severityNVD Advisory· Published Dec 24, 2009· Updated Jun 16, 2026

CVE-2009-4418

CVE-2009-4418

Description

The unserialize function in PHP 5.3.0 and earlier allows context-dependent attackers to cause a denial of service (resource consumption) via a deeply nested serialized variable, as demonstrated by a string beginning with a:1: followed by many {a:1: sequences.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

39
  • PHP/PHP39 versions
    cpe:2.3:a:php:php:*:*:*:*:*:*:*:*+ 38 more
    • cpe:2.3:a:php:php:*:*:*:*:*:*:*:*range: <=5.3.0
    • cpe:2.3:a:php:php:5:*:*:*:*:*:*:*
    • cpe:2.3:a:php:php:5.0.0:*:*:*:*:*:*:*
    • cpe:2.3:a:php:php:5.0.0:beta1:*:*:*:*:*:*
    • cpe:2.3:a:php:php:5.0.0:beta2:*:*:*:*:*:*
    • cpe:2.3:a:php:php:5.0.0:beta3:*:*:*:*:*:*
    • cpe:2.3:a:php:php:5.0.0:beta4:*:*:*:*:*:*
    • cpe:2.3:a:php:php:5.0.0:rc1:*:*:*:*:*:*
    • cpe:2.3:a:php:php:5.0.0:rc2:*:*:*:*:*:*
    • cpe:2.3:a:php:php:5.0.0:rc3:*:*:*:*:*:*
    • cpe:2.3:a:php:php:5.0.1:*:*:*:*:*:*:*
    • cpe:2.3:a:php:php:5.0.2:*:*:*:*:*:*:*
    • cpe:2.3:a:php:php:5.0.3:*:*:*:*:*:*:*
    • cpe:2.3:a:php:php:5.0.4:*:*:*:*:*:*:*
    • cpe:2.3:a:php:php:5.0.5:*:*:*:*:*:*:*
    • cpe:2.3:a:php:php:5.0:rc1:*:*:*:*:*:*
    • cpe:2.3:a:php:php:5.0:rc2:*:*:*:*:*:*
    • cpe:2.3:a:php:php:5.0:rc3:*:*:*:*:*:*
    • cpe:2.3:a:php:php:5.1.0:*:*:*:*:*:*:*
    • cpe:2.3:a:php:php:5.1.1:*:*:*:*:*:*:*
    • cpe:2.3:a:php:php:5.1.2:*:*:*:*:*:*:*
    • cpe:2.3:a:php:php:5.1.3:*:*:*:*:*:*:*
    • cpe:2.3:a:php:php:5.1.4:*:*:*:*:*:*:*
    • cpe:2.3:a:php:php:5.1.5:*:*:*:*:*:*:*
    • cpe:2.3:a:php:php:5.1.6:*:*:*:*:*:*:*
    • cpe:2.3:a:php:php:5.2.0:*:*:*:*:*:*:*
    • cpe:2.3:a:php:php:5.2.1:*:*:*:*:*:*:*
    • cpe:2.3:a:php:php:5.2.10:*:*:*:*:*:*:*
    • cpe:2.3:a:php:php:5.2.11:*:*:*:*:*:*:*
    • cpe:2.3:a:php:php:5.2.2:*:*:*:*:*:*:*
    • cpe:2.3:a:php:php:5.2.3:*:*:*:*:*:*:*
    • cpe:2.3:a:php:php:5.2.4:*:*:*:*:*:*:*
    • cpe:2.3:a:php:php:5.2.4:*:windows:*:*:*:*:*
    • cpe:2.3:a:php:php:5.2.5:*:*:*:*:*:*:*
    • cpe:2.3:a:php:php:5.2.6:*:*:*:*:*:*:*
    • cpe:2.3:a:php:php:5.2.7:*:*:*:*:*:*:*
    • cpe:2.3:a:php:php:5.2.8:*:*:*:*:*:*:*
    • cpe:2.3:a:php:php:5.2.9:*:*:*:*:*:*:*
    • (no CPE)range: <=5.3.0

Patches

Vulnerability mechanics

References

2

News mentions

0

No linked articles in our index yet.