Cisco Patches Serious Vulnerabilities in Data Center Network Manager
Cisco informed customers on Wednesday that it has patched critical and high-severity vulnerabilities in its Data Center Network Manager (DCNM) network management platform.
One of the security flaws, CVE-2020-3382, has been classified as critical. It allows a remote, unauthenticated attacker to bypass authentication and perform actions with admin privileges on the targeted device.
“The vulnerability exists because different installations share a static encryption key. An attacker could exploit this vulnerability by using the static key to craft a valid session token. A successful exploit could allow the attacker to perform arbitrary actions through the REST API with administrative privileges,” Cisco explained.
The networking giant has fixed several high-severity vulnerabilities in DCNM, including weaknesses that can be exploited for arbitrary command injection, path traversal and arbitrary file writing, and bypassing authorization and escalating privileges. However, exploitation of these bugs requires authentication.
The one high-severity vulnerability that can be exploited by an unauthenticated attacker is CVE-2020-3376. It can be leveraged to bypass authentication and execute arbitrary actions.
“The vulnerability is due to a failure in the software to perform proper authentication. An attacker could exploit this vulnerability by browsing to one of the hosted URLs in Cisco DCNM. A successful exploit could allow the attacker to interact with and use certain functions within the Cisco DCNM,” Cisco explained.
The company has also patched three medium-severity vulnerabilities in DCNM, including XSS, SQL injection and information disclosure issues.
Cisco also announced that it has resolved a critical vulnerability in the management interface of the SD-WAN vManage software. The flaw allows an attacker to access potentially sensitive information, modify the configuration of the system, or cause it to become unavailable. However, exploitation requires authentication.
Cisco says none of these vulnerabilities has been exploited for malicious purposes, which is not surprising considering that the more serious ones were all discovered internally.