Code Injection in PHP - CVE-2006-4812
Published: October 30, 2018 / Updated: June 9, 2025
Vulnerability identifier: #VU110468
CSH Severity: High
CVSS v4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2006-4812
CWE-ID: CWE-94
Exploitation vector: Remote access
Exploit availability:
Public exploit is available
Vulnerability details
The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.
Integer overflow in PHP 5 up to 5.1.6 and 4 before 4.3.0 allows remote attackers to execute arbitrary code via an argument to the unserialize PHP function with a large value for the number of array elements, which triggers the overflow in the Zend Engine ecalloc function (Zend/zend_alloc.c).
Affected software
PHP
Gentoo Linux
dev-lang/php
Gentoo Linux
dev-lang/php
How to mitigate CVE-2006-4812
Install update from vendor's website.
PHP - update to 4.10
dev-lang/php - update to 5.1.6-r6
dev-lang/php - update to 5.1.6-r6
Links to Public Exploits and PoC-codes
External References
- http://cvs.php.net/viewvc.cgi/ZendEngine2/zend_alloc.c?r1=1.161&r2=1.162
- http://lists.suse.com/archive/suse-security-announce/2006-Oct/0002.html
- http://rhn.redhat.com/errata/RHSA-2006-0688.html
- http://rhn.redhat.com/errata/RHSA-2006-0708.html
- http://secunia.com/advisories/22280
- http://secunia.com/advisories/22281
- http://secunia.com/advisories/22300
- http://secunia.com/advisories/22331
- http://secunia.com/advisories/22338
- http://secunia.com/advisories/22533
- http://secunia.com/advisories/22538
- http://secunia.com/advisories/22650
- http://securityreason.com/securityalert/1691
- http://securitytracker.com/id?1016984
- http://support.avaya.com/elmodocs2/security/ASA-2006-223.htm
- http://support.avaya.com/elmodocs2/security/ASA-2006-234.htm
- http://www.gentoo.org/security/en/glsa/glsa-200610-14.xml
- http://www.hardened-php.net/advisory_092006.133.html
- http://www.hardened-php.net/files/CVE-2006-4812.patch
- http://www.securityfocus.com/archive/1/448014/100/0/threaded
- http://www.securityfocus.com/archive/1/448953/100/0/threaded
- http://www.securityfocus.com/bid/20349
- http://www.trustix.org/errata/2006/0055
- http://www.ubuntu.com/usn/usn-362-1
- http://www.vupen.com/english/advisories/2006/3922
- https://exchange.xforce.ibmcloud.com/vulnerabilities/29362