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 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.

Score

CVSS 3.0 5.1 Medium

Status

Modified - psirt@cisco.com

Published

2019-05-15

Last modified

2024-11-21

Weaknesses

CWE-200, CWE-755

Affected products

• Cisco Nx-os Software (Cisco)
• Nx-os (Cisco)

References

• http://www.securityfocus.com/bid/108353
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190515-nxos-ssh-info