This security advisory describes one high risk vulnerability.
1) Use of hard-coded credentials
The vulnerability allows a remote attacker to bypass MD5 authentication and establish a BGP connection with the device.
The vulnerability exists when the Border Gateway Protocol (BGP) Message Digest 5 (MD5) authentication is bypassed if the peer does not have MD5 authentication configured, the NX-OS device does have BGP MD5 authentication configured, and the NX-OS BGP virtual routing and forwarding (VRF) name is configured to be greater than 19 characters. A remote unauthenticated attacker can establish a BGP session with the NX-OS device without MD5 authentication.
Install updates from vendor’s website.
Vulnerable software versions
9.2(1), 9.2(2), 9.2(3), 9.3(1)
Cisco Nexus 3000 Series Switches:
Cisco Nexus 9000 Series Switches NX-OS Mode:
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.