CVE-2020-3247: Cisco UCS Director CopyFileRunnable run Symlink Following Remote Code Execution Vulnerability
Multiple vulnerabilities in the REST API of Cisco UCS Director and Cisco UCS Director Express for Big Data may allow a remote attacker to bypass authentication or conduct directory traversal attacks on an affected device. For more information about these vulnerabilities, see the Details section of this advisory.
Other sources
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.
— ZDI
Affected Software
Event History
Frequently Asked Questions
What is CVE-2020-3247?
CVE-2020-3247 is a remote code execution vulnerability in Cisco UCS Director.
What is the severity of CVE-2020-3247?
The severity of CVE-2020-3247 is critical, with a CVSS score of 9.8.
How can remote attackers exploit CVE-2020-3247?
Remote attackers can exploit CVE-2020-3247 without authentication by executing arbitrary code on affected installations of Cisco UCS Director.
Which versions of Cisco UCS Director are affected by CVE-2020-3247?
Versions 6.0.0.0 to 6.7.3.0 of Cisco UCS Director are affected by CVE-2020-3247.
How can I fix CVE-2020-3247?
To fix CVE-2020-3247, it is recommended to apply the necessary updates or patches provided by Cisco.