CVE-2009-3691: IBM Informix Client SDK

High severity, CVSS 9.3. EPSS: 7% chance of exploitation in the next 30 days.

Multiple integer overflows in setnet32.exe 3.50.0.13752 in IBM Informix Client SDK 3.0 and 3.50 and Informix Connect Runtime 3.x allow remote attackers to execute arbitrary code via a .nfx file with a crafted (1) HostSize, and possibly (2) ProtoSize and (3) ServerSize, field that triggers a stack-based buffer overflow involving a crafted HostList field. NOTE: some of these details are obtained from third party information.

Affected products

• IBM Informix Client SDK: version 3.0 only; version 3.50 only
• IBM Informix Connect Runtime: version 3.0 only

Published 2009-10-13. Last modified 2026-06-16.