Vulnerability identifier: #VU11367

Vulnerability 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-2018-0194

CWE-ID: CWE-78

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Cisco IOS XE
Operating systems & Components / Operating system

Vendor: Cisco Systems, Inc

Description
The vulnerability allows a local authenticated attacker to inject and execute arbitrary commands with elevated privileges on the target system.

The weakness exists in the CLI parser due to sufficiently sanitization of command arguments before passing commands to the Linux shell for execution. A local attacker can submit a malicious CLI command, gain access to the underlying Linux shell and execute arbitrary commands with root privileges.

Mitigation
Update to versions 16.4.1, 16.4(0.72), 16.3.1 or 16.3(0.234).

Vulnerable software versions

Cisco IOS XE: 16.1.2 - 16.3.0

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External links
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-cmdinj

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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.