Apache Tomcat: Create Arbitrary Files -- Remote/Unauthenticated

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2017.2487
       [Security] Apache Tomcat Remote Code Execution via JSP Upload
                              4 October 2017

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:          Apache Tomcat
Publisher:        Apache
Operating System: UNIX variants (UNIX, Linux, OSX)
                  Windows
Impact/Access:    Create Arbitrary Files -- Remote/Unauthenticated
Resolution:       Patch/Upgrade
CVE Names:        CVE-2017-12617  

Comment: This advisory references vulnerabilities in products which run on 
         platforms other than Apache. It is recommended that administrators 
         running Apache Tomcat check for an updated version of the software 
         for their operating system.

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CVE-2017-12617 Apache Tomcat Remote Code Execution via JSP Upload

Severity: Important

Vendor: The Apache Software Foundation

Versions Affected:
Apache Tomcat 9.0.0.M1 to 9.0.0
Apache Tomcat 8.5.0 to 8.5.22
Apache Tomcat 8.0.0.RC1 to 8.0.46
Apache Tomcat 7.0.0 to 7.0.81

Description:
When running with HTTP PUTs enabled (e.g. via setting the readonly
initialisation parameter of the Default servlet to false) it was
possible to upload a JSP file to the server via a specially crafted
request. This JSP could then be requested and any code it contained
would be executed by the server.

Mitigation:
Users of the affected versions should apply one of the following
mitigations:
- - Upgrade to Apache Tomcat 9.0.1 or later
- - Upgrade to Apache Tomcat 8.5.23 or later
- - Upgrade to Apache Tomcat 8.0.47 or later
- - Upgrade to Apache Tomcat 7.0.82 or later

Credit:
This issue was first reported publicly followed by multiple reports to
the Apache Tomcat Security Team.

History:
2017-10-03 Original advisory

References:
[1] http://tomcat.apache.org/security-9.html
[2] http://tomcat.apache.org/security-8.html
[3] http://tomcat.apache.org/security-7.html

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