Denial of service in Cisco NX-OS Software

1) Buffer overflow

EUVDB-ID: #VU86912

Risk: High

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2024-20267

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 within the handling of MPLS traffic. A remote attacker can trigger memory corruption and cause a denial of service on the target system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Cisco NX-OS: 6.0(2)U2(1) - 10.4(1)

Cisco Nexus 3000 Series Switches: All versions

Nexus 5500 Platform Switches: All versions

Nexus 5600 Platform Switches: All versions

Nexus 6000 Series Switches: All versions

Nexus 7000 Series Switches: All versions

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

CPE2.3

• cpe:2.3:o:cisco_systems:cisco_nx-os:6.0(2)U2(1):*:*:*:*:*:*:*
• cpe:2.3:o:cisco_systems:cisco_nx-os:6.0(2)U2(2):*:*:*:*:*:*:*
• cpe:2.3:o:cisco_systems:cisco_nx-os:6.0(2)U2(3):*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:cisco_nexus_3000_series_switches:*:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:nexus_5500_platform_switches:*:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:nexus_5600_platform_switches:*:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:nexus_6000_series_switches:*:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:nexus_7000_series_switches:*:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:cisco_nexus_9000_series_switches_nx-os_mode:*:*:*:*:*:*:*:*

External links

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ipv6-mpls-dos-R9ycXkwM

Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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