CVE-2021-1134 Cisco DNA Center Certificate Validation Vulnerability

What is CVE-2021-1134?

CVE-2021-1134 is a high-severity vulnerability in Cisco Digital Network Architecture Center (DNA Center), published on 29 Jun 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A vulnerability in the Cisco Identity Services Engine (ISE) integration feature of the Cisco DNA Center Software could allow an unauthenticated, remote attacker to gain unauthorized access to sensitive data. The vulnerability is due to an incomplete validation of the X.509 certificate used when establishing a connection between DNA Center and an ISE server. An attacker could exploit this vulnerability by supplying a crafted certificate and could then intercept communications between the ISE and DNA Center. A successful exploit could allow the attacker to view and alter sensitive information that the ISE maintains about clients that are connected to the network.

Weakness: CWE-295

Which versions are affected by CVE-2021-1134?

It affects 1 product.

Products include Cisco Catalyst Center.

How do I fix CVE-2021-1134?

No fix has been published for CVE-2021-1134 yet. Limit exposure of the affected software until one is available.

Is CVE-2021-1134 being exploited?

There is no known exploitation of CVE-2021-1134 in the wild and no public exploit code.

Other vulnerabilities in Cisco Digital Network Architecture Center (DNA Center)

• CVE-2021-1264 Cisco DNA Center Command Runner Command Injection Vulnerability Critical 9.6
• CVE-2023-20055 Cisco DNA Center Privilege Escalation Vulnerability High 8.0
• CVE-2021-1265 Cisco DNA Center Information Disclosure Vulnerability High 7.7
• CVE-2026-20191 Cisco Catalyst Center Arbitrary File Read Vulnerability High 7.5
• CVE-2024-20350 Cisco Catalyst Center Static SSH Host Key Vulnerability High 7.5

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-c46x-8q9c-r3vx.