#VU54189 Improper Certificate Validation in Cisco DNA Center - CVE-2021-1134

Vulnerability identifier: #VU54189

Vulnerability risk: Medium

CVSSv4.0: 6.9 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-1134

CWE-ID: CWE-295

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Cisco DNA Center
Other software / Other software solutions

Vendor: Cisco Systems, Inc

Description

The vulnerability allows a remote attacker to gain unauthorized access to sensitive data.

The vulnerability exists due to an incomplete validation of the X.509 certificate used when establishing a connection between DNA Center and Cisco Identity Services Engine (ISE) server. A remote attacker can use a specially crafted certificate and view sensitive information on the target system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Cisco DNA Center: before 2.2.2.1

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External links
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-dnac-certvalid-USEj2CZk

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.