CVE-2020-3167: Cisco FXOS and UCS Manager Software CLI Command Injection Vulnerability

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.9% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-02-26 · updated 2026-08-11
Weakness: CWE-78

Description

A vulnerability in the CLI of Cisco FXOS Software and Cisco UCS Manager Software could allow an authenticated, local attacker to execute arbitrary commands on the underlying operating system (OS). The vulnerability is due to insufficient input validation. An attacker could exploit this vulnerability by including crafted arguments to specific commands. A successful exploit could allow the attacker to execute arbitrary commands on the underlying OS with the privileges of the currently logged-in user for all affected platforms excluding Cisco UCS 6400 Series Fabric Interconnects. On Cisco UCS 6400 Series Fabric Interconnects, the injected commands are executed with root privileges.

Affected products

Cisco ASA Software: from 9.8 before 9.9.2.66; from 9.10 before 9.12.3.6; from 9.13 before 9.13.1.5 — fixed in 9.12.3.6, 9.13.1.5, 9.9.2.66
Cisco Firepower Extensible Operating System (FXOS): before 2.4.1.234 — fixed in 2.4.1.234
Cisco Firepower Threat Defense Software: from 6.2.2 before 6.2.3.13; from 6.3.0 before 6.4.0.8; from 6.5.0 before 6.5.0.2 — fixed in 6.2.3.13, 6.4.0.8, 6.5.0.2
Cisco Ucs Manager: before 3.2\(3n\); from 4.0 before 4.0\(4g\) — fixed in 3.2\(3n\), 4.0\(4g\)

How to fix

Upgrade to a fixed version: Cisco ASA Software 9.12.3.6, 9.13.1.5, 9.9.2.66; Cisco Firepower Extensible Operating System (FXOS) 2.4.1.234; Cisco Firepower Threat Defense Software 6.2.3.13, 6.4.0.8, 6.5.0.2; Cisco Ucs Manager 3.2\(3n\), 4.0\(4g\). Check the vendor advisory for mitigations.

References

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