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Cisco Nexus Operating System Devices Command Line Interface Local Privilege Escalation Vulnerability

Information

Severity

Severity

Medium

Family

Family

CISCO

CVSSv2 Base

CVSSv2 Base

4.6

CVSSv2 Vector

CVSSv2 Vector

AV:L/AC:L/Au:N/C:P/I:P/A:P

Solution Type

Solution Type

Vendor Patch

Created

Created

6 years ago

Modified

Modified

3 years ago

Summary

A vulnerability in the Command Line Interface (CLI) parser of Cisco Nexus Operating System (NX-OS) devices could allow an authenticated, local attacker to perform a privilege escalation. The vulnerability is due to improper input validation of special characters within filenames. An attacker could exploit this vulnerability by authenticating at the local shell and writing a file to disk with certain special characters. The attacker could then use that file with other CLI commands to obtain a shell prompt at their current privilege level. An exploit could allow the attacker to read and write files and perform other privileged commands. Cisco has confirmed the vulnerability. However, software updates are not available. To exploit this vulnerability, an attacker must have local access and be able to authenticate to the targeted device. These requirements could limit the possibility of a successful exploit.

Detection Method

Detection Method

Checks if a vulnerable version is present on the target host.

Solution

Solution

See the referenced vendor advisory for a solution.

Common Vulnerabilities and Exposures (CVE)