CVE-2023-41081 Apache Tomcat Connectors (mod_jk) Authentication Bypass
Severity: Important
Vendor: The Apache Software Foundation
Versions Affected:
- Apache Tomcat Connectors mod_jk Connector 1.2.0 to 1.2.48
Description:
In some circumstances, such as when a configuration included
"JkOptions +ForwardDirectories" but the configuration did not provide
explicit mounts for all possible proxied requests, mod_jk would use an
implicit mapping and map the request to the first defined worker. Such
an implicit mapping could result in the unintended exposure of the
status worker and/or bypass security constraints configured in httpd. As
of JK 1.2.49, the implicit mapping functionality has been removed and
all mappings must now be via explicit configuration.
Only mod_jk is affected by this issue. The ISAPI redirector is not affected.
Mitigation:
Users of affected versions should apply one of the following mitigations:
- Upgrade to Apache Tomcat Connector (mod_jk) 1.2.49 or later.
- Ensure explicit mounts are configured for all possible proxied
requests
Credit:
This vulnerability was reported responsibly to the Tomcat security team
by Karl von Randow.
History
2023-09-13 Original advisory
2023-09-28 Updated summary
References:
[1] http://tomcat.apache.org/security-jk.html
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