Improper Authentication in Cisco SD-WAN vManage Software

1) Improper Authentication

EUVDB-ID: #VU30348

Risk: Low

CVSSv3.1: 6.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-3388

CWE-ID: CWE-287 - Improper Authentication

Exploit availability: No

Description

The vulnerability allows a local user to bypass authentication process.

The vulnerability exists due to an error in when processing authentication requests in the CLI. A local user can pass a specially crafted input to the CLI, bypass authentication process and execute commands with root privileges..

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Cisco SD-WAN: 18.3.0 - 20.1.0

External links

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-clibypvman-sKcLf2L

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to open a a specially crafted file.

The attacker would have to login to the system and perform certain actions in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.