{"cve":"CVE-2009-0840","nvd":{"published":"2009-03-31T18:24:45.860","modified":"2026-06-16T23:05:55.503","status":"Modified","description":"Heap-based buffer underflow in the readPostBody function in cgiutil.c in mapserv in MapServer 4.x before 4.10.4 and 5.x before 5.2.2 allows remote attackers to have an unknown impact via a negative value in the Content-Length HTTP header.","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-119"],"references":["http://lists.osgeo.org/pipermail/mapserver-users/2009-March/060600.html","http://secunia.com/advisories/34520","http://secunia.com/advisories/34603","http://trac.osgeo.org/mapserver/ticket/2943","http://www.debian.org/security/2009/dsa-1914"],"products":["osgeo:mapserver","umn:mapserver"],"source":"nvd","synced_at":"2026-10-19T19:54:07.895733559+00:00"},"epss":{"cve":"CVE-2009-0840","score":0.05283,"percentile":0.92572,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}