Date: Wed, 31 Oct 2018 18:21:48 +0000 From: Mark Thomas <markt@...che.org> To: oss-security@...ts.openwall.com Subject: CVE-2018-11759 Apache Tomcat JK (mod_jk) Connector path traversal 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 Raphaël Arrouas (Xel) and Jean Lejeune (Nitrax) from immunIT. References:  http://tomcat.apache.org/security-jk.html
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