Privilege escalation in Cisco IOS XE SD-WAN CLI

1) Resource management error

EUVDB-ID: #VU51735

Risk: Low

CVSSv3.1: 5.8 [CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-1281

CWE-ID: CWE-399 - Resource Management Errors

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to improper management of concurrent CLI sessions within CLI management in Cisco IOS XE SD-WAN Software. A local administrative user can execute a sequence of commands and obtain root privileges on the device.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Cisco IOS XE SD-WAN: 17.3 - 17.4.1

External links

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-clipriv-9TO2QGVp
http://bst.cloudapps.cisco.com/bugsearch/bug/CSCvv65659

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.

Is there known malware, which exploits this vulnerability?

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