Access control list bypass in Cisco Nexus 3550-F Switches

1) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU100068

Risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2024-20371

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise the target device.

The vulnerability exists due to the access control list (ACL) deny rules are not properly enforced at the time of device reboot. A remote attacker can send traffic to the management interface of the target device.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Cisco Nexus 3550-F Switch: - - 1.17.1

CPE2.3

• cpe:2.3:h:cisco_systems:cisco_nexus_3550-f_switch:*:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:cisco_nexus_3550-f_switch:1.17.1:*:*:*:*:*:*:*

External links

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-3550-acl-bypass-mhskZc2q

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected device in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.