cbcvebase.
CVE-2020-3250
published 2020-04-15

CVE-2020-3250: 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…

PriorityP181critical9.8CVSS 3.1
AVNACLPRNUINSUCHIHAH
EXPLOIT
EPSS
60.16%
99.0th percentile
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.

Affected

21 ranges
VendorProductVersion rangeFixed in
ciscocisco_ucs_director
ciscoucs_director
ciscoucs_director
ciscoucs_director
ciscoucs_director
ciscoucs_director
ciscoucs_director
ciscoucs_director
ciscoucs_director
ciscoucs_director
ciscoucs_director
ciscoucs_director
ciscoucs_director
ciscoucs_director
ciscoucs_director
ciscoucs_director
ciscoucs_director
ciscoucs_director
ciscoucs_director
ciscoucs_director_and_cisco_ucs_director_express_for_big_data
ciscoucs_director_express_for_big_data<= 3.7.3.0

Detection & IOCsextracted from sources · hover to see the quote

url/app/api/rest
  • Monitor REST API endpoints on Cisco UCS Director for unauthenticated or anomalous requests that include directory traversal sequences (e.g., '../') in path parameters, which may indicate exploitation of the authentication bypass or traversal vulnerabilities.
  • Alert on REST API requests that attempt to leak the administrator API key file from an absolute path, particularly requests referencing the LEAK_FILE parameter pattern used by the Metasploit module targeting this CVE.
  • Detect execution of Cloupia scripts via the REST API, especially those submitted by unauthenticated or newly authenticated sessions, as the exploit chain culminates in arbitrary root command execution through the Cloupia script interpreter.
  • Flag Cisco UCS Director instances running versions below 6.7.4.0 as vulnerable; prioritize patching or network-level controls for these versions.
  • ·If an administrator API key is already known or separately obtained, the authentication bypass step is unnecessary — the attacker can proceed directly to Cloupia script RCE. Detection strategies must account for abuse of legitimate API keys, not just unauthenticated access.
  • ·The vulnerabilities span both Cisco UCS Director and Cisco UCS Director Express for Big Data; detection and patching scope must include both products.

CVSS provenance

nvdv3.19.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
nvdv3.09.8CRITICALCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
nvdv2.07.5HIGHAV:N/AC:L/Au:N/C:P/I:P/A:P
vendor_cisco9.8CRITICAL
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