#VU52919 Improper Authentication in Cisco SD-WAN vManage - CVE-2021-1284

Vulnerability identifier: #VU52919

Vulnerability risk: High

CVSSv4.0: 6.3 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2021-1284

CWE-ID: CWE-287

Exploitation vector: Local network

Exploit availability: No

Vulnerable software:
Cisco SD-WAN vManage
Other software / Other software solutions

Vendor: Cisco Systems, Inc

Description

The vulnerability allows a remote attacker to bypass authentication process.

The vulnerability exists due to an error in when processing authentication requests. A remote attacker on the local network can bypass authentication process and modify the configuration of an affected system.

Successful exploitation of the vulnerability may result in full system compromise.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Cisco SD-WAN vManage: 19.1.0 - 20.5.0

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External links
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdw-auth-bypass-65aYqcS2
https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvu28360
https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvu28390
https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvu28402
https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvu28454
https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvv67264

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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.