CVE-2011-3140: IBM g400 Ips-g400-Ib-1 Appliance

Medium severity, CVSS 5.0. EPSS: 2.2% chance of exploitation in the next 30 days.

IBM Web Application Firewall, as used on the G400 IPS-G400-IB-1 and GX4004 IPS-GX4004-IB-2 appliances with update 31.030, does not properly handle query strings with multiple instances of the same parameter, which allows remote attackers to bypass intended intrusion prevention by dividing a dangerous parameter value into substrings, as demonstrated by a SQL statement that is split across multiple iid parameters and then sent to a .aspx file on an IIS web server.

Affected products

• IBM g400 Ips-g400-Ib-1 Appliance
• IBM GX4004 Ips-GX4004-Ib-2 Appliance
• IBM Web Application Firewall: affected versions not specified

Published 2011-08-15. Last modified 2026-06-16.