Cisco Small Business Switches Secure Shell Certificate Authentication Bypass Vulnerability
CVE-2019-1859

7.2HIGH

Key Information:

Vendor

Cisco
Status
Cisco Small Business 200 Series Smart Switches
Vendor
CVE Published:
3 May 2019

Badges

👾 Exploit Exists

What is CVE-2019-1859?

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.

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Affected Version(s)

Cisco Small Business 200 Series Smart Switches < 1.4.10.6

Cisco Small Business 200 Series Smart Switches < 2.5.0.78

References

https://tools.cisco.com/security/center/content/CiscoSecu...
vendor-advisoryx_refsource_CISCO

CVSS V3.1

Score:
7.2
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
High
User Interaction:
None
Scope:
Unchanged

Timeline

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

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