[SECURITY] CVE-2018-8020 Apache Tomcat Native Connector - Mishandled OCSP responses can allow clients to authenticate with revoked certificates

[Jean-Frederic Clere <jf...@apache.org>]

CVE-2018-8020 Apache Tomcat Native Connector - Mishandled OCSP responses can allow clients to authenticate with revoked certificates

Severity: Important

Vendor: The Apache Software Foundation

Versions Affected:
Apache Tomcat Native 1.2.0 to 1.2.16
Apache Tomcat Native 1.1.23 to 1.1.34

Description:
Apache Tomcat Native has a flaw that does not properly check OCSP pre-produced
responses, which are lists (multiple entries) of certificate statuses.
Subsequently, revoked client certificates may not be properly identified,
allowing for users to authenticate with revoked certicates to connections that
require mutual TLS.
Users not using OCSP checks are not affected by this vulnerability.

Mitigation:
Users of the affected versions should apply one of the following
mitigations:
- Upgrade to Apache Tomcat 1.2.17 or later
  Note: This version was included in Apache Tomcat 9.0.10 onwards, 8.5.32
        onwards, 8.0.53 onwards and 7.0.90 onwards.

History:
2018-03-09 Original advisory

References:
[1] http://tomcat.apache.org/security-native.html

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