Medium severity · published May 15, 2019
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…
4.4
CVSS
0.4%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
Attack vector
Local
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 29% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
NX
Nx-os · Cisco
before 7.0\(3\)i4\(9\); 7.0\(3\)i7 before 7.0\(3\)i7\(4\); before 6.0\(2\)a8\(10\); 7.0\(3\)i4 before 7.0\(3\)i7\(4\); before 7.3\(4\)n1\(1\); 7.0\(3\) before 7.0\(3\)f3\(5\) · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-1731
CVE.org
https://www.cve.org/CVERecord?id=CVE-2019-1731
Third Party Advisory
http://www.securityfocus.com/bid/108353
Vendor Advisory
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190515-nxos-ssh-info
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