CVE-2019-1859

Published May 3, 2019

Last updated 4 years ago

Overview

Description
A vulnerability in the Secure Shell (SSH) authentication process of Cisco Small Business Switches software could allow an attacker to bypass client-side certificate authentication and revert to password authentication. The vulnerability exists because OpenSSH mishandles the authentication process. An attacker could exploit this vulnerability by attempting to connect to the device via SSH. A successful exploit could allow the attacker to access the configuration as an administrative user if the default credentials are not changed. There are no workarounds available; however, if client-side certificate authentication is enabled, disable it and use strong password authentication. Client-side certificate authentication is disabled by default.
Source
ykramarz@cisco.com
NVD status
Analyzed

Social media

Hype score
Not currently trending

Risk scores

CVSS 3.1

Type
Primary
Base score
7.2
Impact score
5.9
Exploitability score
1.2
Vector string
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Severity
HIGH

CVSS 3.0

Type
Secondary
Base score
7.2
Impact score
5.9
Exploitability score
1.2
Vector string
CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Severity
HIGH

CVSS 2.0

Type
Primary
Base score
6.5
Impact score
6.4
Exploitability score
8
Vector string
AV:N/AC:L/Au:S/C:P/I:P/A:P

Weaknesses

nvd@nist.gov
CWE-295
ykramarz@cisco.com
CWE-285

Configurations