The JSON_parser function (ext/json/JSON_parser.c) in PHP 5.2.x before 5.2.9 allows remote attackers to cause a denial of service…

Description

The JSON_parser function (ext/json/JSON_parser.c) in PHP 5.2.x before 5.2.9 allows remote attackers to cause a denial of service (segmentation fault) via a malformed string to the json_decode API function.

Scores

EPSS (exploitation in 30 days)

2.4% · top 16% of all CVEs (5 Nov 2026)

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.0.

Weakness

• n/a

Affected products

• n/a

  • affected n/a

References (22)

• [oss-security] 20090401 CVE request: PHP 5.2.9 (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• DSA-1775 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
• FEDORA-2009-3768 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
• http://cvs.php.net/viewvc.cgi/php-src/ext/json/JSON_parser.c?r1=1.1.2.14&r2=1.1.2.15 (opens in a new tab)x_refsource_MISCx_transferred
• 34770 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• APPLE-SA-2009-09-10-2 (opens in a new tab)vendor-advisoryx_refsource_APPLEx_transferred
• http://www.php.net/releases/5_2_9.php (opens in a new tab)x_refsource_CONFIRMx_transferred
• 35007 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• 34933 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• 34830 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• USN-761-2 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
• RHSA-2009:0350 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• FEDORA-2009-3848 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
• 35003 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• 35685 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• SUSE-SR:2009:012 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
• http://support.apple.com/kb/HT3865 (opens in a new tab)x_refsource_CONFIRMx_transferred
• 36701 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• MDVSA-2009:090 (opens in a new tab)vendor-advisoryx_refsource_MANDRIVAx_transferred
• 35306 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• USN-761-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
• DSA-1789 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_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-2009-1271](https://trackcve.app/badge/CVE-2009-1271.svg)](https://trackcve.app/cve/CVE-2009-1271)

Record last updated 7 Aug 2024, 05:04 UTC.