Advisory Details

January 3rd, 2020

Cisco Data Center Network Manager TrustedClientTokenValidator Hard-coded Cryptographic Key Authentication Bypass Vulnerability

CVE ID	CVE-2019-15975
CVSS SCORE	9.8, AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AFFECTED VENDORS	Cisco
AFFECTED PRODUCTS	Data Center Network Manager
VULNERABILITY DETAILS	This vulnerability allows remote attackers to bypass authentication on affected installations of Cisco Data Center Network Manager. The specific flaw exists within the processing of the dbadmin/addUser functionality. The issue results from trusting input that has been encrypted with a hard-coded and discoverable cryptographic key. An attacker can leverage this vulnerability to add new global admins to the system.
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-20200102-dcnm-auth-bypass
DISCLOSURE TIMELINE	2019-08-09 - Vulnerability reported to vendor 2020-01-03 - Coordinated public release of advisory
CREDIT	Steven Seeley (mr_me) of Source Incite

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