CVE-2019-1734: A vulnerability in the implementation of a CLI diagnostic command in Cisco FXOS Software and Cisco NX-OS Software could allow an authenticated, local ...

Description

A vulnerability in the implementation of a CLI diagnostic command in Cisco FXOS Software and Cisco NX-OS Software could allow an authenticated, local attacker to view sensitive system files that should be restricted. The attacker could use this information to conduct additional reconnaissance attacks. The vulnerability is due to incomplete role-based access control (RBAC) verification. An attacker could exploit this vulnerability by authenticating to the device and issuing a specific CLI diagnostic command with crafted user-input parameters. An exploit could allow the attacker to perform an arbitrary read of a file on the device, and the file may contain sensitive information. The attacker needs valid device credentials to exploit this vulnerability.

Metrics

CVSS 3.1

5.5/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

EPSS Probability

0.31%

22.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-200

Affected Software

Vendor	Product	Versions
Cisco	Firepower Extensible Operating System	< 2.2.2.91
Cisco	Firepower Extensible Operating System	>= 2.3, < 2.3.1.111
Cisco	Firepower Extensible Operating System	>= 2.4, < 2.4.1.101
Cisco	Nx-Os	< 6.2\(7\)
Cisco	Nx-Os	< 7.0\(3\)i4\(9\)
Cisco	Nx-Os	>= 7.0\(3\)i7, < 7.0\(3\)i7\(6\)
Cisco	Nx-Os	< 6.0\(2\)a4\(1\)
Cisco	Nx-Os	>= 7.0\(3\)i4, < 7.0\(3\)i4\(9\)
Cisco	Nx-Os	>= 7.0\(3\), < 7.0\(3\)f3\(5\)
Cisco	Nx-Os	< 7.1\(4\)n1\(1\)
Cisco	Nx-Os	>= 7.2, < 7.3\(0\)n1\(1\)
Cisco	Nx-Os	< 6.2\(6\)
Cisco	Nx-Os	< 4.0\(1a\)

References

Timeline

Published: Nov 5, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-1734?

A vulnerability in the implementation of a CLI diagnostic command in Cisco FXOS Software and Cisco NX-OS Software could allow an authenticated, local attacker to view sensitive system files that should be restricted. The attacker could use this information to conduct additional reconnaissance attacks. The vulnerability is due to incomplete role-based access control (RBAC) verification. An attacker could exploit this vulnerability by authenticating to the device and issuing a specific CLI diagnostic command with crafted user-input parameters. An exploit could allow the attacker to perform an arbitrary read of a file on the device, and the file may contain sensitive information. The attacker needs valid device credentials to exploit this vulnerability.

How severe is CVE-2019-1734?

CVE-2019-1734 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.31% probability of exploitation in the next 30 days.

How do I fix CVE-2019-1734?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.