CVE-2017-15698: Apache Tomcat Native

Medium severity, CVSS 5.9. EPSS: 3.5% chance of exploitation in the next 30 days.

When parsing the AIA-Extension field of a client certificate, Apache Tomcat Native Connector 1.2.0 to 1.2.14 and 1.1.23 to 1.1.34 did not correctly handle fields longer than 127 bytes. The result of the parsing error was to skip the OCSP check. It was therefore possible for client certificates that should have been rejected (if the OCSP check had been made) to be accepted. Users not using OCSP checks are not affected by this vulnerability.

Affected products

• Apache Tomcat Native: from 1.1.23, up to and including 1.1.34; from 1.2.0, up to and including 1.2.14
• Debian Debian Linux: version 8.0 only; version 9.0 only

Published 2018-01-31. Last modified 2026-06-17.