Privilege escalation in Cisco Identity Services Engine

1) Privilege escalation

EUVDB-ID: #VU9085

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-2017-12261

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a local attacker to gain elevated privileges on the target system.

The weakness exists in the restricted shell of the Cisco Identity Services Engine (ISE) that is accessible via SSH due to incomplete input validation of the user input for CLI commands issued at the restricted shell. A local attacker can use valid user credentials and run arbitrary CLI commands with elevated privileges.

Mitigation

Install update from vendor's website (1.4 patch 12, 2.0 patch 6, 2.1 patch 5, 2.2.0 patch 2).

Vulnerable software versions

Cisco Identity Services Engine (ISE): 1.4 - 2.2

External links

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171101-ise

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.