Vulnerability CVE-2006-4812
Published: 2006-10-10   Modified: 2012-02-12

Description:
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).

See advisories in our WLB2 database:
Topic
Author
Date
High
PHP unserialize() Array Creation Integer Overflow
Stefan Esser
10.10.2006

Type:

CWE-94

 (Improper Control of Generation of Code ('Code Injection'))

CVSS2 => (AV:N/AC:L/Au:N/C:C/I:C/A:C)

CVSS Base Score
Impact Subscore
Exploitability Subscore
10/10
10/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
Complete
Complete
Complete
Affected software
PHP -> PHP 

 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://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
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