Usage of static SSH host key in Cisco Umbrella Virtual Appliance



Published: 2022-04-21
Risk High
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2022-20773
CWE-ID CWE-321
Exploitation vector Local network
Public exploit N/A
Vulnerable software
Subscribe
Cisco Umbrella Virtual Appliance
Server applications / Virtualization software

Vendor Cisco Systems, Inc

Security Bulletin

This security bulletin contains one high risk vulnerability.

1) Use of Hard-coded Cryptographic Key

EUVDB-ID: #VU62464

Risk: High

CVSSv3.1: 7.7 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-20773

CWE-ID: CWE-321 - Use of Hard-coded Cryptographic Key

Exploit availability: No

Description

The vulnerability allows a remote attacker to impersonate the virtual appliance.

The vulnerability exists due to the presence of a static SSH host key. A remote attacker can perform a man-in-the-middle (MitM) attack on an SSH connection to the Umbrella VA.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Cisco Umbrella Virtual Appliance: 3.0.0 - 3.3.1


CPE2.3 External links

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-uva-static-key-6RQTRs4c
http://bst.cloudapps.cisco.com/bugsearch/bug/CSCwa11399

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

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



###SIDEBAR###