Cisco UCS Director CopyFileRunnable run Symlink Following Remote Code Execution Vulnerability
Vulnerability Details
This vulnerability allows remote attackers to execute arbitrary code on affected installations of Cisco UCS Director. Authentication is not required to exploit this vulnerability.
The specific flaw exists within the processing of tar files by the LargeFileUploadServlet endpoint. The issue results from the lack of proper validation of a user-supplied UNIX symbolic link prior to using it in file operations. An attacker can leverage this vulnerability to execute code in the context of the tomcat service.
Additional Details
Cisco has issued an update to correct this vulnerability. More details can be found at:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ucsd-mult-vulns-UNfpdW4E
Disclosure Timeline
- 2019-12-20 - Vulnerability reported to vendor
- 2020-04-16 - Coordinated public release of advisory
Credit
Steven Seeley (mr_me) of Source Incite
