CVE-2009-0840: OSGeo Mapserver

High severity, CVSS 10.0. EPSS: 5.3% chance of exploitation in the next 30 days.

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.

Affected products

• OSGeo Mapserver: version 4.2.0 only; version 4.4.0 only; version 4.6.0 only; version 4.8.0 only; version 4.10.0 only; version 4.10.1 only; …
• Umn Mapserver: version 4.0 only

Published 2009-03-31. Last modified 2026-06-16.