TI-2006-01936 Aliases CVE-2006-1991 GHSA-7xcj-pr22-cx39

The substr_compare function in string.c in PHP 5.1.2 allows context-dependent attackers…

LOW 33CWE-399Published 2006-04-24 · Updated 2024-08-07

Key facts

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

Attack profile from CVSS 2.0 · NVD. Fix status from CNA.

Summary

The substr_compare function in string.c in PHP 5.1.2 allows context-dependent attackers to cause a denial of service (memory access violation) via an out-of-bounds offset argument.

Why it matters now

EPSS 0.02238 82nd percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

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

Vendor	Product	Affected versions	Fixed in	Status	Source
—	—	all versions	—	No fix listed	CNA

— Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:php:php:5.1.2:::::::*	5.1.2	Vulnerable	PHP

cpe:2.3:a:php:php:5.1.2:*:*:*:*:*:*:* Versions 5.1.2 Vulnerable ·PHP

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2006-1991
2026-10-03 Alias added: GHSA-7xcj-pr22-cx39

References

Exploit 1

http://www.infigo.hr/en/in_focus/advisories/INFIGO-2006-04-02

Advisory 5

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