CVE-2011-3140

Severity: medium (CVSS 5.0 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.2% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2011-08-15 · updated 2026-06-16
Weakness: CWE-264

Description

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: 31.030
IBM Gx4004 Ips-Gx4004-Ib-2 Appliance: 31.030
IBM Web Application Firewall: all versions

References

http://securityreason.com/securityalert/8339
http://securitytracker.com/id?1025683
http://www.iss.net/security_center/reference/vuln/HTTP_Parameter_Abuse.htm
http://www.securityfocus.com/archive/1/518556/100/0/threaded
http://www.securityfocus.com/bid/48370
https://exchange.xforce.ibmcloud.com/vulnerabilities/67178
https://www.trustwave.com/spiderlabs/advisories/TWSL2011-006.txt
http://securityreason.com/securityalert/8339
http://securitytracker.com/id?1025683
http://www.iss.net/security_center/reference/vuln/HTTP_Parameter_Abuse.htm
http://www.securityfocus.com/archive/1/518556/100/0/threaded
http://www.securityfocus.com/bid/48370

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