This security advisory describes one high risk vulnerability.
1) Improper Authentication
Risk: High
CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C] [PCI]
CVE-ID: CVE-2021-34746
CWE-ID: CWE-287 - Improper Authentication
Exploit availability: No
Description
The vulnerability allows a remote attacker to bypass authentication process.
The vulnerability exists due to an error in when processing authentication requests in the TACACS+ authentication, authorization and accounting (AAA) feature. A remote attacker can inject parameters into an authentication request, bypass authentication and log in as an administrator to the affected device.
Mitigation
Install updates from vendor's website.
Vulnerable software versions
Enterprise NFV Infrastructure Software: 4.5.1
CPE
External links
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nfvis-g2DMVVh
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.
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