CVE-2019-1731: A vulnerability in the SSH CLI key management functionality of Cisco NX-OS Software could allow an authenticated, local attacker to expose a user's private SSH…

medium4.4CVSS 3.1

AVLACLPRHUINSUCHINAN

A vulnerability in the SSH CLI key management functionality of Cisco NX-OS Software could allow an authenticated, local attacker to expose a user's private SSH key to all authenticated users on the targeted device. The attacker must authenticate with valid administrator device credentials. The vulnerability is due to incomplete error handling if a specific error type occurs during the SSH key export. An attacker could exploit this vulnerability by authenticating to the device and entering a crafted command at the CLI. A successful exploit could allow the attacker to expose a user's private SSH key. In addition, a similar type of error in the SSH key import could cause the passphrase-protected private SSH key to be imported unintentionally.

Affected

8 ranges

Vendor	Product	Version range	Fixed in
cisco	cisco_nx-os_software	>= unspecified < 8.3(1)	8.3(1)
cisco	nx-os	< 7.0\(3\)i4\(9\)	7.0\(3\)i4\(9\)
cisco	nx-os	< 6.0\(2\)a8\(10\)	6.0\(2\)a8\(10\)
cisco	nx-os	< 7.3\(4\)n1\(1\)	7.3\(4\)n1\(1\)
cisco	nx-os	—	—
cisco	nx-os	>= 7.0\(3\) < 7.0\(3\)f3\(5\)	7.0\(3\)f3\(5\)
cisco	nx-os	>= 7.0\(3\)i4 < 7.0\(3\)i7\(4\)	7.0\(3\)i7\(4\)
cisco	nx-os	>= 7.0\(3\)i7 < 7.0\(3\)i7\(4\)	7.0\(3\)i7\(4\)