Privilege escalation in Cisco Unified Computing System Fabric Interconnects

1) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU20444

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-2019-1966

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

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

The vulnerability exists due to extraneous sub-command options present for a specific CLI command within the local-mgmt context. A local authenticated attacker can enter the local-mgmt context, issue a specific CLI command and gain root privileges on the device.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Cisco Unified Computing System: 3.2.3b - 4.0.1a

UCS 6300 Series Fabric Interconnects: All versions

UCS 6200 Series Fabric Interconnects: All versions

External links

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190828-ucs-privescalation
http://bst.cloudapps.cisco.com/bugsearch/bug/CSCvm80093
http://bst.cloudapps.cisco.com/bugsearch/bug/CSCvm77243

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.