Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2017.1714 Possible RCE in the Struts Showcase app in the Struts 1 plugin example in Struts 2.3.x series 10 July 2017 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Apache Struts Operating System: UNIX variants (UNIX, Linux, OSX) Windows Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated Resolution: Mitigation CVE Names: CVE-2017-9791 Original Bulletin: http://struts.apache.org/docs/s2-048.html - --------------------------BEGIN INCLUDED TEXT-------------------- S2-048 Summary Possible RCE in the Struts Showcase app in the Struts 1 plugin example in Struts 2.3.x series Who should read this All Struts 2 developers and users should read this Impact of vulnerability Possible RCE when using the Struts 2 Struts 1 plugin Maximum security rating High Recommendation Please read the Solution section Affected Software Struts 2.3.x with Struts 1 plugin and Struts 1 action Reporter icez <ic3z at qq dot com> from Tophant Competence Center CVE Identifier CVE-2017-9791 Problem It is possible to perform a RCE attack with a malicious field value when using the Struts 2 Struts 1 plugin and it's a Struts 1 action and the value is a part of a message presented to the user, i.e. when using untrusted input as a part of the error message in the ActionMessage class. Solution Always use resource keys instead of passing a raw message to the ActionMessage as shown below, never pass a raw value directly messages.add("msg", new ActionMessage("struts1.gangsterAdded", gform.getName())); and never like this messages.add("msg", new ActionMessage("Gangster " + gform.getName() + " was added")); Backward compatibility No backward incompatibility issues are expected. - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: http://www.auscert.org.au/render.html?cid=1980 =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBWWLHqox+lLeg9Ub1AQh/OQ//XkRitUFahQUyDN2xC+DsuvwI5Z8mmCl7 o84ipZac6dKxgtFv0CdEZMfvsPvj7iU/wZjSZnOsk9c0dD7X+ClFXGhw4g6Z7dme 2TwVatQ7iwFqbrEodb2j4xxhYMgX8Tf9xTG0nIGtwZWvXDav3gWYnXA+OU+bj/LE TfAxNA4NRmOVra6pIjjdMnAgjYbSKZ1/QQYaWGCO3xstI5PHbd2ZLOrccHHxqYzz 6RFAViM4JnJRotey0c7pmDpWlK5RU/ypD8xHpBz9pl+6ifQ7LkYK1XjFz1DJiw1i g/4azjAvzLW5ubzNOpxF69olRRqb494ZiWqlSLEg7Oj2DtpOmkU/xBpJiIMHIlIW FzQlOBkxZ8wPEyK7VphyzJ6tZ1ymOdHe44qp0jE8v6WjfXxStjg2aIqP32uvVUhx 7Y5loLOhH8nIfcweMaJy6pu46+ls+twlBqgZ2Gj+OWidT3+nZwa26VoSYWAddBjG BsnNNxzH671lww3fLWGrT8Ae3DP05ecz7UIWa88qTI9WOQUGOoeqLdvY4vfanOzH aD9EanwtfZnq1R1p8zDtFUkvmCqpqM/lpn+3cJEWgL9Q6TnWRGKOqrfpiRL23LBE gQQAI3EhUTPDW9zlssBDTf5S9uJyOi6w9SiX/sXQFY7qTe2PtsTaipqQhI8sK4jb 01piHr3qy6o= =WSgg -----END PGP SIGNATURE-----