Denial of service in Cisco FXOS and NX-OS Software

1) Buffer overflow

EUVDB-ID: #VU86915

Risk: Medium

CVSSv3.1: 5.8 [CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]

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: 4.1 - 4.3

UCS 6400 Series Fabric Interconnects: 4.1 - 4.3

UCS 6300 Series Fabric Interconnects: 4.1 - 4.3

UCS 6200 Series Fabric Interconnects: 4.1 - 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

External links

http://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-lldp-dos-z7PncTgt
http://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.