Resource management error in PHP - CVE-2006-1991
Published: July 20, 2017 / Updated: June 8, 2025
Vulnerability identifier: #VU110485
CSH Severity: Medium
CVSS v4: 6.9 [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]
CVE-ID: CVE-2006-1991
CWE-ID: CWE-399
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
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.
Affected software
PHP
Gentoo Linux
dev-lang/php
Gentoo Linux
dev-lang/php
How to mitigate CVE-2006-1991
Install update from vendor's website.
PHP - update to 5.1.3
dev-lang/php - addressed in versions 5.1.4-r4, 5.1.4-r6
dev-lang/php - addressed in versions 5.1.4-r4, 5.1.4-r6
External References
- http://secunia.com/advisories/20052
- http://secunia.com/advisories/20269
- http://secunia.com/advisories/20676
- http://secunia.com/advisories/21125
- http://security.gentoo.org/glsa/glsa-200605-08.xml
- http://securitytracker.com/id?1015979
- http://www.infigo.hr/en/in_focus/advisories/INFIGO-2006-04-02
- http://www.mandriva.com/security/advisories?name=MDKSA-2006:091
- http://www.novell.com/linux/security/advisories/2006_31_php.html
- http://www.ubuntu.com/usn/usn-320-1
- http://www.vupen.com/english/advisories/2006/1500
- https://exchange.xforce.ibmcloud.com/vulnerabilities/26003