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…

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).

Scores

EPSS (exploitation in 30 days)

20.4% · top 2.5% of all CVEs (5 Nov 2026)

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 10.0.

Weakness

• n/a
• CWE-94 (opens in a new tab)All about CWE-94 and its CVEs

Affected products

• n/a

  • affected n/a

References (26)

• 22300 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• 22650 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• 1016984 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
• 22281 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• 22338 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• 20349 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
• OpenPKG-SA-2006.023 (opens in a new tab)vendor-advisoryx_refsource_OPENPKGx_transferred
• GLSA-200610-14 (opens in a new tab)vendor-advisoryx_refsource_GENTOOx_transferred
• 2006-0055 (opens in a new tab)vendor-advisoryx_refsource_TRUSTIXx_transferred
• RHSA-2006:0688 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• USN-362-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
• RHSA-2006:0708 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• 22538 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• 1691 (opens in a new tab)third-party-advisoryx_refsource_SREASONx_transferred
• http://www.hardened-php.net/advisory_092006.133.html (opens in a new tab)x_refsource_MISCx_transferred
• 22533 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• http://www.hardened-php.net/files/CVE-2006-4812.patch (opens in a new tab)x_refsource_CONFIRMx_transferred
• http://support.avaya.com/elmodocs2/security/ASA-2006-223.htm (opens in a new tab)x_refsource_CONFIRMx_transferred
• php-ecalloc-integer-overflow(29362) (opens in a new tab)vdb-entryx_refsource_XFx_transferred
• http://cvs.php.net/viewvc.cgi/ZendEngine2/zend_alloc.c?r1=1.161&r2=1.162 (opens in a new tab)x_refsource_CONFIRMx_transferred
• SUSE-SA:2006:059 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
• 20061009 Advisory 09/2006: PHP unserialize() Array Creation Integer Overflow (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
• 22331 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• ADV-2006-3922 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
• 22280 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• http://support.avaya.com/elmodocs2/security/ASA-2006-234.htm (opens in a new tab)x_refsource_CONFIRMx_transferred

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2006-4812](https://trackcve.app/badge/CVE-2006-4812.svg)](https://trackcve.app/cve/CVE-2006-4812)

Record last updated 7 Aug 2024, 19:23 UTC.