Improper Authentication in Cisco Systems, Inc products - CVE-2020-3297

Vulnerability identifier: #VU29466

CSH Severity: High

CVSS v4: 9.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2020-3297

CWE-ID: CWE-287

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to bypass authentication process.

The vulnerability exists due to the use of weak entropy generation for session identifier values. A remote attacker can perform a brute-force attack to determine a current session identifier, bypass authentication process and gain unauthorized access to the application.

Cisco 250 Series Smart Switches
Cisco 350 Series Managed Switches
Cisco 350X Series Stackable Managed Switches
Cisco 550X Series Stackable Managed Switches
Cisco Small Business 200 Series Smart Switches
Cisco Small Business 300 Series Managed Switches
Cisco Small Business 500 Series Stackable Managed Switches

Install updates from vendor's website.

Cisco 250 Series Smart Switches - update to 2.5.5.47
Cisco 350 Series Managed Switches - update to 2.5.5.47
Cisco 350X Series Stackable Managed Switches - update to 2.5.5.47
Cisco 550X Series Stackable Managed Switches - update to 2.5.5.47

• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sbswitch-session-JZAS5jnY

• Multiple vulnerabilities in Cisco Small Business Smart and Managed Switches