Critical Flaws in Cisco DNA Center Allow Unauthorized Access

Cisco has found and patched three critical unauthorized access vulnerabilities in its Digital Network Architecture (DNA) platform. Cisco DNA is a solution that helps enterprises automate network operations, making it easy to design, provision and apply policies across their environments. Cisco discovered that the DNA Center is impacted by three serious flaws.

One of them, CVE-2018-0222, is related to the existence of undocumented static credentials for the default admin account. A remote attacker could leverage these credentials to gain access to the affected system and execute commands with root privileges. The issue has been addressed with the release of Cisco DNA Center software version 1.1.3.

The second vulnerability, CVE-2018-0271, allows a remote attacker to bypass authentication and obtain privileged access to critical services in the DNA Center. This flaw has been patched with the release of Cisco DNA Center software version 1.1.2. "The vulnerability is due to a failure to normalize URLs prior to servicing requests.

An attacker could exploit this vulnerability by submitting a crafted URL designed to exploit the issue," Cisco explained in an advisory. The third critical security hole in DNA Center, CVE-2018-0268, also allows a remote attacker to bypass authentication and obtain elevated privileges. A patch is included in version 1.1.3.

"This vulnerability is due to an insecure default configuration of the Kubernetes container management subsystem within DNA Center," Cisco said. "An attacker who has the ability to access the Kubernetes service port could execute commands with elevated privileges within provisioned containers. A successful exploit could result in a complete compromise of affected containers." All the vulnerabilities were discovered by Cisco itself and there is no evidence of malicious exploitation.

Cisco published more than a dozen security advisories on Wednesday, including four that describe high severity vulnerabilities. The list includes a cross-site request forgery (CSRF) flaw in IoT Field Network Director (IoT-FND), a denial-of-service (DoS) bug in the Identity Services Engine (ISE), a shell access vulnerability in Enterprise NFV Infrastructure Software (NFVIS), and a DoS problem in Meeting Server. Related: Cisco Patches Critical Flaws in WebEx, UCS Director

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