Resource management error in PHP - CVE-2006-1991

 

Resource management error in PHP - CVE-2006-1991

Published: July 20, 2017 / Updated: June 8, 2025


Vulnerability identifier: #VU110485
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2006-1991
CWE-ID: CWE-399
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vendor: PHP Group
Affected software:
PHP

Detailed vulnerability description

The vulnerability allows a remote non-authenticated attacker to manipulate or delete data.

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.


How to mitigate CVE-2006-1991

Install update from vendor's website.

Sources