Denial of service in Cisco FXOS and NX-OS Software

1) Buffer overflow

EUVDB-ID: #VU86915

Risk: Medium

CVSSv4.0: 4.3 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2024-20294

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary error in the Link Layer Discovery Protocol (LLDP) feature. A remote attacker on the local network can trigger memory corruption and cause a denial of service condition on the target system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Cisco FXOS: 2.2.1.63 - 16.0(3e)

Cisco NX-OS: 2.2.1.63 - 16.0(3e)

Firepower 4100 Series Security Appliances: All versions

Cisco Firepower 9300 Security Appliance: All versions

Cisco MDS 9000 Series Multilayer Switches: All versions

UCS 6500 Series Fabric Interconnects: - - 4.3

UCS 6400 Series Fabric Interconnects: - - 4.3

UCS 6300 Series Fabric Interconnects: - - 4.3

UCS 6200 Series Fabric Interconnects: - - 4.3

Cisco Nexus 9000 Series Switches NX-OS Mode: All versions

Cisco Nexus 9000 Series Switches in ACI Mode: All versions

Nexus 7000 Series Switches: All versions

Nexus 6000 Series Switches: All versions

Nexus 5600 Platform Switches: All versions

Nexus 5500 Platform Switches: All versions

Cisco Nexus 3000 Series Switches: All versions

CPE2.3

• cpe:2.3:o:cisco_systems:cisco_fxos:2.2.1.63:*:*:*:*:*:*:*
• cpe:2.3:o:cisco_systems:cisco_fxos:2.2.1.66:*:*:*:*:*:*:*
• cpe:2.3:o:cisco_systems:cisco_fxos:2.2.1.70:*:*:*:*:*:*:*
• cpe:2.3:o:cisco_systems:cisco_nx-os:2.2.1.63:*:*:*:*:*:*:*
• cpe:2.3:o:cisco_systems:cisco_nx-os:2.2.1.66:*:*:*:*:*:*:*
• cpe:2.3:o:cisco_systems:cisco_nx-os:2.2.1.70:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:firepower_4100_series_security_appliances:*:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:cisco_firepower_9300_security_appliance:*:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:cisco_mds_9000_series_multilayer_switches:*:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:ucs_6500_series_fabric_interconnects:*:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:ucs_6400_series_fabric_interconnects:*:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:ucs_6300_series_fabric_interconnects:*:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:ucs_6200_series_fabric_interconnects:*:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:cisco_nexus_9000_series_switches_nx-os_mode:*:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:cisco_nexus_9000_series_switches_in_aci_mode:*:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:nexus_7000_series_switches:*:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:nexus_6000_series_switches:*:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:nexus_5600_platform_switches:*:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:nexus_5500_platform_switches:*:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:cisco_nexus_3000_series_switches:*:*:*:*:*:*:*:*

External links

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-lldp-dos-z7PncTgt
https://www.dell.com/support/kbdoc/nl-nl/000224066/dsa-2024-154-security-update-for-dell-connectrix-nx-os-sw-and-mds-9000-switches-link-layer-discovery-protocol-lldp-vulnerabilities

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

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