SRC-2020-0012 : Cisco UCS Director CIMCDownloadDiagnosticsReport doFormSubmit Directory Traversal Information Disclosure Vulnerability



CVSS Score:

6.5, (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N)

Affected Vendors:


Affected Products:

Cisco UCS Director and Cisco UCS Director Express for Big Data

Vulnerability Details:

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Cisco UCS Director and Cisco UCS Director Express for Big Data. Although authentication is required to exploit this vulnerability, the existing authentication mechanism can be bypassed.

The specific flaw exists within the CIMCDownloadDiagnosticsReport class. The issue results from the lack of proper validation of user-supplied context array prior to using it in file operations. An attacker could leverage this vulnerability to disclose stored credentials, leading to further compromise.

Vendor Response:

Cisco has issued an update to correct this vulnerability. More details can be found at:

Disclosure Timeline:

  • 2020-01-08 - Verified and sent to Cisco PSIRT
  • 2020-04-16 – Coordinated public release of advisory


This vulnerability was discovered by Steven Seeley (mr_me) of Source Incite