CVE-2022-22333: IBM Sterling External Authentication Server

Medium severity, CVSS 6.5. EPSS: 0.6% chance of exploitation in the next 30 days.

IBM Sterling Secure Proxy 6.0.3.0, 6.0.2.0, and 3.4.3.2 and IBM Sterling External Authentication Server are vulnerable a buffer overflow, due to the Jetty based GUI in the Secure Zone not properly validating the sizes of the form content and/or HTTP headers submitted. A local attacker positioned inside the Secure Zone could submit a specially crafted HTTP request to disrupt service. IBM X-Force ID: 219133.

Affected products

• IBM Sterling External Authentication Server: version 3.4.3.2 only; version 6.0.2.0 only; version 6.0.3.0 only
• IBM Sterling Secure Proxy: version 3.4.3.2 only; version 6.0.2 only; version 6.0.3.0 only

Published 2022-02-23. Last modified 2026-06-17.