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TI-2009-04181 Aliases CVE-2009-4418GHSA-37px-x6g4-3pm2

The unserialize function in PHP 5.3.0 and earlier allows context-dependent attackers to…

Priority LOW 25CWE-189Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
— Not recorded in CVSS 2.0
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · Partial
Fix status
No fix listed

Attack profile from CVSS 2.0 · NVD. Fix status from CNA. Impact type from CWE-189 and the CVSS impact.

Summary

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.

Why it matters now

EPSS 0.0097 62nd percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 38

CPEVersionsRoleVendor
cpe:2.3:a:php:php:*:*:*:*:*:*:*:*up to 5.3.0VulnerablePHP
cpe:2.3:a:php:php:5:*:*:*:*:*:*:*5VulnerablePHP
cpe:2.3:a:php:php:5.0:rc1:*:*:*:*:*:*5.0 rc1VulnerablePHP
cpe:2.3:a:php:php:5.0:rc2:*:*:*:*:*:*5.0 rc2VulnerablePHP
cpe:2.3:a:php:php:5.0:rc3:*:*:*:*:*:*5.0 rc3VulnerablePHP
cpe:2.3:a:php:php:5.0.0:*:*:*:*:*:*:*5.0.0VulnerablePHP
cpe:2.3:a:php:php:5.0.0:beta1:*:*:*:*:*:*5.0.0 beta1VulnerablePHP
cpe:2.3:a:php:php:5.0.0:beta2:*:*:*:*:*:*5.0.0 beta2VulnerablePHP
cpe:2.3:a:php:php:5.0.0:beta3:*:*:*:*:*:*5.0.0 beta3VulnerablePHP
cpe:2.3:a:php:php:5.0.0:beta4:*:*:*:*:*:*5.0.0 beta4VulnerablePHP
  • cpe:2.3:a:php:php:*:*:*:*:*:*:*:* Versions up to 5.3.0 Vulnerable ·PHP
  • cpe:2.3:a:php:php:5:*:*:*:*:*:*:* Versions 5 Vulnerable ·PHP
  • cpe:2.3:a:php:php:5.0:rc1:*:*:*:*:*:* Versions 5.0 rc1 Vulnerable ·PHP
  • cpe:2.3:a:php:php:5.0:rc2:*:*:*:*:*:* Versions 5.0 rc2 Vulnerable ·PHP
  • cpe:2.3:a:php:php:5.0:rc3:*:*:*:*:*:* Versions 5.0 rc3 Vulnerable ·PHP
  • cpe:2.3:a:php:php:5.0.0:*:*:*:*:*:*:* Versions 5.0.0 Vulnerable ·PHP
  • cpe:2.3:a:php:php:5.0.0:beta1:*:*:*:*:*:* Versions 5.0.0 beta1 Vulnerable ·PHP
  • cpe:2.3:a:php:php:5.0.0:beta2:*:*:*:*:*:* Versions 5.0.0 beta2 Vulnerable ·PHP
  • cpe:2.3:a:php:php:5.0.0:beta3:*:*:*:*:*:* Versions 5.0.0 beta3 Vulnerable ·PHP
  • cpe:2.3:a:php:php:5.0.0:beta4:*:*:*:*:*:* Versions 5.0.0 beta4 Vulnerable ·PHP
Show 28 more CPE
CPEVersionsRoleVendor
cpe:2.3:a:php:php:5.0.0:rc1:*:*:*:*:*:*5.0.0 rc1VulnerablePHP
cpe:2.3:a:php:php:5.0.0:rc2:*:*:*:*:*:*5.0.0 rc2VulnerablePHP
cpe:2.3:a:php:php:5.0.0:rc3:*:*:*:*:*:*5.0.0 rc3VulnerablePHP
cpe:2.3:a:php:php:5.0.1:*:*:*:*:*:*:*5.0.1VulnerablePHP
cpe:2.3:a:php:php:5.0.2:*:*:*:*:*:*:*5.0.2VulnerablePHP
cpe:2.3:a:php:php:5.0.3:*:*:*:*:*:*:*5.0.3VulnerablePHP
cpe:2.3:a:php:php:5.0.4:*:*:*:*:*:*:*5.0.4VulnerablePHP
cpe:2.3:a:php:php:5.0.5:*:*:*:*:*:*:*5.0.5VulnerablePHP
cpe:2.3:a:php:php:5.1.0:*:*:*:*:*:*:*5.1.0VulnerablePHP
cpe:2.3:a:php:php:5.1.1:*:*:*:*:*:*:*5.1.1VulnerablePHP
cpe:2.3:a:php:php:5.1.2:*:*:*:*:*:*:*5.1.2VulnerablePHP
cpe:2.3:a:php:php:5.1.3:*:*:*:*:*:*:*5.1.3VulnerablePHP
cpe:2.3:a:php:php:5.1.4:*:*:*:*:*:*:*5.1.4VulnerablePHP
cpe:2.3:a:php:php:5.1.5:*:*:*:*:*:*:*5.1.5VulnerablePHP
cpe:2.3:a:php:php:5.1.6:*:*:*:*:*:*:*5.1.6VulnerablePHP
cpe:2.3:a:php:php:5.2.0:*:*:*:*:*:*:*5.2.0VulnerablePHP
cpe:2.3:a:php:php:5.2.1:*:*:*:*:*:*:*5.2.1VulnerablePHP
cpe:2.3:a:php:php:5.2.2:*:*:*:*:*:*:*5.2.2VulnerablePHP
cpe:2.3:a:php:php:5.2.3:*:*:*:*:*:*:*5.2.3VulnerablePHP
cpe:2.3:a:php:php:5.2.4:*:*:*:*:*:*:*5.2.4VulnerablePHP
cpe:2.3:a:php:php:5.2.4:*:windows:*:*:*:*:*5.2.4VulnerablePHP
cpe:2.3:a:php:php:5.2.5:*:*:*:*:*:*:*5.2.5VulnerablePHP
cpe:2.3:a:php:php:5.2.6:*:*:*:*:*:*:*5.2.6VulnerablePHP
cpe:2.3:a:php:php:5.2.7:*:*:*:*:*:*:*5.2.7VulnerablePHP
cpe:2.3:a:php:php:5.2.8:*:*:*:*:*:*:*5.2.8VulnerablePHP
cpe:2.3:a:php:php:5.2.9:*:*:*:*:*:*:*5.2.9VulnerablePHP
cpe:2.3:a:php:php:5.2.10:*:*:*:*:*:*:*5.2.10VulnerablePHP
cpe:2.3:a:php:php:5.2.11:*:*:*:*:*:*:*5.2.11VulnerablePHP
  • cpe:2.3:a:php:php:5.0.0:rc1:*:*:*:*:*:* Versions 5.0.0 rc1 Vulnerable ·PHP
  • cpe:2.3:a:php:php:5.0.0:rc2:*:*:*:*:*:* Versions 5.0.0 rc2 Vulnerable ·PHP
  • cpe:2.3:a:php:php:5.0.0:rc3:*:*:*:*:*:* Versions 5.0.0 rc3 Vulnerable ·PHP
  • cpe:2.3:a:php:php:5.0.1:*:*:*:*:*:*:* Versions 5.0.1 Vulnerable ·PHP
  • cpe:2.3:a:php:php:5.0.2:*:*:*:*:*:*:* Versions 5.0.2 Vulnerable ·PHP
  • cpe:2.3:a:php:php:5.0.3:*:*:*:*:*:*:* Versions 5.0.3 Vulnerable ·PHP
  • cpe:2.3:a:php:php:5.0.4:*:*:*:*:*:*:* Versions 5.0.4 Vulnerable ·PHP
  • cpe:2.3:a:php:php:5.0.5:*:*:*:*:*:*:* Versions 5.0.5 Vulnerable ·PHP
  • cpe:2.3:a:php:php:5.1.0:*:*:*:*:*:*:* Versions 5.1.0 Vulnerable ·PHP
  • cpe:2.3:a:php:php:5.1.1:*:*:*:*:*:*:* Versions 5.1.1 Vulnerable ·PHP
  • cpe:2.3:a:php:php:5.1.2:*:*:*:*:*:*:* Versions 5.1.2 Vulnerable ·PHP
  • cpe:2.3:a:php:php:5.1.3:*:*:*:*:*:*:* Versions 5.1.3 Vulnerable ·PHP
  • cpe:2.3:a:php:php:5.1.4:*:*:*:*:*:*:* Versions 5.1.4 Vulnerable ·PHP
  • cpe:2.3:a:php:php:5.1.5:*:*:*:*:*:*:* Versions 5.1.5 Vulnerable ·PHP
  • cpe:2.3:a:php:php:5.1.6:*:*:*:*:*:*:* Versions 5.1.6 Vulnerable ·PHP
  • cpe:2.3:a:php:php:5.2.0:*:*:*:*:*:*:* Versions 5.2.0 Vulnerable ·PHP
  • cpe:2.3:a:php:php:5.2.1:*:*:*:*:*:*:* Versions 5.2.1 Vulnerable ·PHP
  • cpe:2.3:a:php:php:5.2.2:*:*:*:*:*:*:* Versions 5.2.2 Vulnerable ·PHP
  • cpe:2.3:a:php:php:5.2.3:*:*:*:*:*:*:* Versions 5.2.3 Vulnerable ·PHP
  • cpe:2.3:a:php:php:5.2.4:*:*:*:*:*:*:* Versions 5.2.4 Vulnerable ·PHP
  • cpe:2.3:a:php:php:5.2.4:*:windows:*:*:*:*:* Versions 5.2.4 Vulnerable ·PHP
  • cpe:2.3:a:php:php:5.2.5:*:*:*:*:*:*:* Versions 5.2.5 Vulnerable ·PHP
  • cpe:2.3:a:php:php:5.2.6:*:*:*:*:*:*:* Versions 5.2.6 Vulnerable ·PHP
  • cpe:2.3:a:php:php:5.2.7:*:*:*:*:*:*:* Versions 5.2.7 Vulnerable ·PHP
  • cpe:2.3:a:php:php:5.2.8:*:*:*:*:*:*:* Versions 5.2.8 Vulnerable ·PHP
  • cpe:2.3:a:php:php:5.2.9:*:*:*:*:*:*:* Versions 5.2.9 Vulnerable ·PHP
  • cpe:2.3:a:php:php:5.2.10:*:*:*:*:*:*:* Versions 5.2.10 Vulnerable ·PHP
  • cpe:2.3:a:php:php:5.2.11:*:*:*:*:*:*:* Versions 5.2.11 Vulnerable ·PHP

Remediation

No fixed version listed by the sources yet.

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-02 Threatist record created from CVE-2009-4418
  2. 2026-10-03 Alias added: GHSA-37px-x6g4-3pm2

References

Other 2

  • TI-2024-04260 Argument Injection in PHP-CGI KEVCVSS 3.1CRITICAL 9.8
  • TI-2019-08259 Underflow in PHP-FPM can lead to RCE KEVCVSS 3.1CRITICAL 9.8
  • TI-2012-01607 sapi/cgi/cgi_main.c in PHP before 5.3.12 and 5.4.x before 5.4.2, when configured as a CGI… KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-78794 PHP remote code execution via stale global state KEVCVSS 4.0CRITICAL 9.2
  • TI-2026-78793 Out-of-memory handling flaw in PHP allows remote code execution KEVCVSS 4.0CRITICAL 9.2
  • TI-2015-00205 Heap-based buffer overflow in the __nss_hostname_digits_dots function in glibc 2.2, and… CVSS 2.0HIGH 10.0
See all 739 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences