CVE-2013-6747: IBM Global Security Kit

High severity, CVSS 7.1. EPSS: 2.2% chance of exploitation in the next 30 days.

IBM GSKit 7.x before 7.0.4.48 and 8.x before 8.0.50.16, as used in IBM Security Directory Server (ISDS) and Tivoli Directory Server (TDS), allows remote attackers to cause a denial of service (application crash or hang) via a malformed X.509 certificate chain.

Affected products

• IBM Global Security Kit: version 8.5 only; version 7.0 only; version 7.0.4.28 only; version 7.0.4.29 only; version 8.0 only; version 8.0.13 only
• IBM Security Directory Server: affected versions not specified
• IBM Tivoli Directory Server: affected versions not specified

Published 2014-01-27. Last modified 2026-06-17.