scanf.c in PHP 5.1.4 and earlier, and 4.4.3 and earlier, allows context-dependent attackers to execute arbitrary code via a sscanf PHP…

Description

scanf.c in PHP 5.1.4 and earlier, and 4.4.3 and earlier, allows context-dependent attackers to execute arbitrary code via a sscanf PHP function call that performs argument swapping, which increments an index past the end of an array and triggers a buffer over-read.

Scores

EPSS (exploitation in 30 days)

2.0% · top 19% of all CVEs (5 Nov 2026)

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 4.6.

Weakness

• n/a

Affected products

• n/a

  • affected n/a

References (38)

• 1016984 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
• http://www.plain-text.info/sscanf_bug.txt (opens in a new tab)x_refsource_MISCx_transferred
• http://www.php.net/release_5_1_5.php (opens in a new tab)x_refsource_CONFIRMx_transferred
• 19415 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
• 21768 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• 21403 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• RHSA-2006:0669 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• MDKSA-2006:144 (opens in a new tab)vendor-advisoryx_refsource_MANDRIVAx_transferred
• oval:org.mitre.oval:def:11062 (opens in a new tab)vdb-entrysignaturex_refsource_OVALx_transferred
• 21847 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• SUSE-SR:2006:020 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
• 22487 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• USN-342-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
• http://support.avaya.com/elmodocs2/security/ASA-2006-221.htm (opens in a new tab)x_refsource_CONFIRMx_transferred
• 22039 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• RHSA-2006:0688 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• http://bugs.php.net/bug.php?id=38322 (opens in a new tab)x_refsource_CONFIRMx_transferred
• 21683 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• 23247 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• 21467 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• SUSE-SR:2006:019 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
• 22004 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• http://support.avaya.com/elmodocs2/security/ASA-2006-222.htm (opens in a new tab)x_refsource_CONFIRMx_transferred
• 22538 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• RHSA-2006:0682 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• 21546 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• 21608 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• 22440 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• 22069 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• 20060804 php local buffer underflow could lead to arbitary code execution (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
• http://support.avaya.com/elmodocs2/security/ASA-2006-223.htm (opens in a new tab)x_refsource_CONFIRMx_transferred
• SUSE-SR:2006:022 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
• ADV-2006-3193 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
• http://www.php.net/ChangeLog-5.php#5.1.5 (opens in a new tab)x_refsource_CONFIRMx_transferred
• GLSA-200608-28 (opens in a new tab)vendor-advisoryx_refsource_GENTOOx_transferred
• 1341 (opens in a new tab)third-party-advisoryx_refsource_SREASONx_transferred
• RHSA-2006:0736 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• SUSE-SA:2006:052 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_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-2006-4020](https://trackcve.app/badge/CVE-2006-4020.svg)](https://trackcve.app/cve/CVE-2006-4020)

Record last updated 7 Aug 2024, 18:57 UTC.