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From Mark Thomas <ma...@apache.org>
Subject [SECURITY] CVE-2018-11759 Apache Tomcat JK (mod_jk) Connector path traversal
Date Wed, 31 Oct 2018 17:48:20 GMT
CVE-2018-11759 Apache Tomcat JK (mod_jk) Connector path traversal

Severity: Important

Vendor: The Apache Software Foundation

Versions Affected:
- Apache Tomcat JK mod_jk Connector 1.2.0 to 1.2.44

Description:
The Apache Web Server (httpd) specific code that normalised the 
requested path before matching it to the URI-worker map did not handle 
some edge cases correctly. If only a sub-set of the URLs supported by 
Tomcat were exposed via httpd, then it was possible for a specially 
constructed request to expose application functionality through the 
reverse proxy that was not intended for clients accessing the 
application via the reverse proxy. It was also possible in some 
configurations for a specially constructed request to bypass the access 
controls configured in httpd.
While there is some overlap between this issue and CVE-2018-1323, they 
are not identical.

Mitigation:
Users of affected versions should apply one of the following mitigations:
- Upgrade to Apache Tomcat JK ISAPI Connector 1.2.46 or later.
- Use alternative measures (e.g. the remote address filter) to restrict
   access to trusted users.

Credit:
This issue was first discovered by Alphan YAVAS from Biznet Bilisim A.S. 
and reported responsibly to the Apache Tomcat Security Team. Additional 
attack vectors were identified by Raphaƫl Arrouas (Xel) and Jean Lejeune 
(Nitrax) from immunIT.


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

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