F5 Unauthenticated rsync access to Remote Root Code Execution Affected Versions: F5 BIG-IP 11.x versions before 11.6.0, 11.5.1 HF3, 11.5.0 HF4, 11.4.1 HF, 11.4.0 HF7, 11.3.0 HF9, and 11.2.1 HF11, Enterprise Manager 3.x versions before 3.1.1 HF2 PDF: http://www.security-assessment.com/files/documents/advisory/F5_Unauthenticated_rsync_access_to_Remote_Root_Code_Execution.pdf +-------------+ | Description | +-------------+ When configured in a high availability mode, the F5 solution suffers from an unauthenticated rsync access vulnerability that can be leveraged to upload a malicious SSH key and gain remote root access to the appliance. The BigIP platform configures an rsync daemon listening on the ConfigSync interfaces when the system is configured in a failover mode. The rsync daemon as currently configured does not require any authentication and the "cmi" module has complete read/write access to the system. If the ConfigSync IP addresses are accessible by a malicious third party, it is possible to upload an authorized_keys file directly into the /var/ssh/root directory and then open a root SSH session on the f5 device. +--------------+ | Exploitation | +--------------+ Detailed exploitation information is available in the PDF version of this Advisory, available at http://www.security-assessment.com. +----------+ | Solution | +----------+ F5 have published a detailed advisory, including patch and mitigation information, at the following URL: http://support.f5.com/kb/en-us/solutions/public/15000/200/sol15236.html +---------------------+ | Disclosure Timeline | +---------------------+ 24-04-2014: Vendor notified at security-reporting () f5 com 24-04-2014: Vendor responds with intent to investigate, and opens a support ticket to track the issue 05-05-2014: First follow up sent 06-05-2014: Vendor responds with internal bug numbers 10-05-2014: Vendor advises code fixes are complete and offers an embargo date of 29-08-2014 for advisory release 12-05-2014: Embargo date accepted 29-08-2014: Advisory released About Security-Assessment.com Security-Assessment.com is Australasia's leading team of Information Security consultants specialising in providing high quality Information Security services to clients throughout the Asia Pacific region. Our clients include some of the largest globally recognised companies in areas such as finance, telecommunications, broadcasting, legal and government. Our aim is to provide the very best independent advice and a high level of technical expertise while creating long and lasting professional relationships with our clients. Security-Assessment.com is committed to security research and development, and its team continues to identify and responsibly publish vulnerabilities in public and private software vendor's products. Members of the Security-Assessment.com R&D team are globally recognised through their release of whitepapers and presentations related to new security research. For further information on this issue or any of our service offerings, contact us: Web www.security-assessment.com Email info () security-assessment com Phone +64 4 470 1650 Thomas Hibbert Security Consultant Security-Assessment.com