Symptom
A vulnerability in the web-based management interface of Cisco Data Center Network Manager (DCNM) Software could allow an authenticated, remote attacker to view, modify, and delete data without proper authorization.
The vulnerability is due to a failure to limit access to resources that are intended for administrators only. An attacker with low-level privileges could exploit this vulnerability by submitting a crafted URL to an affected device. A successful exploit could allow the attacker to list, view, create, edit, and delete templates in the same manner as a user with administrative privileges.
Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.
This advisory is available at the following link:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-dcnm-bypass-auth-mVDR6ygT
Conditions
At the time of publication, this vulnerability affected Cisco DCNM Software releases earlier than Release 11.4(1).
At the time of publication, Cisco DCNM Software releases 11.4(1) and later contained the fix for this vulnerability.
Workaround
Please refer to the Security Advisory.
Further Problem Description
Please refer to the Security Advisory.
PSIRT Evaluation
The Cisco PSIRT has assigned this bug the following CVSS version 3 score. The Base CVSS score as of the time of evaluation is 6.3:
https://tools.cisco.com/security/center/cvssCalculator.x?vector=CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
CVE ID CVE-2020-3540 has been assigned to document this issue.
Information about Fixed, Vulnerable, and Nonvulnerable releases--as well as information about fixed release availability--is not maintained by Cisco PSIRT. Please refer to the appropriate fields in this bug. If you require additional help to obtain this information, please open a support case with your support organization.
Additional information on Cisco's security vulnerability policy can be found at the following URL:
http://www.cisco.com/en/US/products/products_security_vulnerability_policy.html
