Denial of service in Cisco Catalyst SD-WAN Routers

1) State Issues

EUVDB-ID: #VU97731

Risk: High

CVSSv3.1: 7.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2024-20455

CWE-ID: CWE-371 - State Issues

Exploit availability: No

Description

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

The vulnerability exists due to the Unified Threat Defense (UTD) improperly handles certain packets as those packets egress an SD-WAN IPsec tunnel. A remote attacker can cause a denial of service condition.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Cisco IOS XE: 17.9.3a

Cisco 1000 Series Integrated Services Routers: All versions

Catalyst 8000V Edge Software: All versions

Catalyst 8200 Series Edge Platforms: All versions

Catalyst 8300 Series Edge Platforms: All versions

Catalyst 8500L Series Edge Platforms: All versions

Catalyst IR8300 Rugged Series Routers: All versions

CPE2.3

• cpe:2.3:o:cisco_systems:cisco_ios_xe:17.9.3a:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:cisco_1000_series_integrated_services_routers:*:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:catalyst_8000v_edge_software:*:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:catalyst_8200_series_edge_platforms:*:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:catalyst_8300_series_edge_platforms:*:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:catalyst_8500l_series_edge_platforms:*:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:catalyst_ir8300_rugged_series_routers:*:*:*:*:*:*:*:*

External links

http://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-utd-dos-hDATqxs

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.