Denial of service in Cisco IOS XE Software Resource Public Key Infrastructure

1) Reachable Assertion

EUVDB-ID: #VU62315

Risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2022-20694

CWE-ID: CWE-617 - Reachable Assertion

Exploit availability: No

Description

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

The vulnerability exists due to a reachable assertion in the implementation of the Resource Public Key Infrastructure (RPKI) feature. A remote attacker can send a specially crafted RTR packet and cause the Border Gateway Protocol (BGP) process to crash, resulting in a denial of service condition.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Cisco IOS XE: 016.000

Cisco 1000 Series Integrated Services Routers: All versions

Cisco 4000 Series Integrated Services Routers: All versions

Cisco 8000 Series Routers: All versions

Cisco 9800 Series Wireless Controllers: All versions

Cisco ASR 1000 Series Aggregation Services Routers: All versions

Cisco ASR 900 Series Aggregation Services Routers: All versions

Cisco ASR 920 Series Aggregation Services Router: All versions

Catalyst 3650 Series Switches: All versions

Catalyst 3850 Series Switches: All versions

Catalyst 8000V Edge Software: All versions

Catalyst 8200 Series Edge Platforms: All versions

Catalyst 8200 Series Edge uCPE: All versions

Catalyst 8300 Series Edge Platforms: All versions

Catalyst 8300 Series Edge Universal CPE: All versions

Catalyst 8500 Series Edge Platforms: All versions

Catalyst 8500L Series Edge Platforms: All versions

Catalyst 9200 Series Switches: All versions

Catalyst 9300 Series Switches: All versions

Catalyst 9400 Series Switches: All versions

Catalyst 9500 Series Switches: All versions

Catalyst 9500H Series Switches: All versions

Catalyst 9600 Series Switches: All versions

Catalyst 9800 Series Wireless Controllers: All versions

Catalyst Cellular Gateways: All versions

Catalyst ESS9300 Embedded Series Switch: All versions

Catalyst IE3200 Rugged Series: All versions

Catalyst IE3300 Rugged Series: All versions

Catalyst IE3400 Heavy Duty Series: All versions

Catalyst IE3400 Rugged Series: All versions

Catalyst IE9300 Rugged Series: All versions

Cloud Services Router 1000V Series: All versions

ESR6300 Embedded Series Routers: All versions

Embedded Services 3300 Series Switches: All versions

Integrated Services Virtual Router: All versions

Network Convergence System 500 Series Routers: All versions

cBR Series Converged Broadband Routers: All versions

CPE2.3

• cpe:2.3:o:cisco_systems:cisco_ios_xe:016.000:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:cisco_1000_series_integrated_services_routers:*:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:cisco_4000_series_integrated_services_routers:*:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:cisco_8000_series_routers:*:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:cisco_9800_series_wireless_controllers:*:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:cisco_asr_1000_series_aggregation_services_routers:*:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:cisco_asr_900_series_aggregation_services_routers:*:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:cisco_asr_920_series_aggregation_services_router:*:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:catalyst_3650_series_switches:*:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:catalyst_3850_series_switches:*:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:catalyst_8000v_edge_software:*:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:catalyst_8200_series_edge_platforms:*:*:*:*:*:*:*:*
• cpe:2.3:a:cisco_systems:catalyst_8200_series_edge_ucpe:*:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:catalyst_8300_series_edge_platforms:*:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:catalyst_8300_series_edge_universal_cpe:*:*:*:*:*:*:*:*
• cpe:2.3:a:cisco_systems:catalyst_8500_series_edge_platforms:*:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:catalyst_8500l_series_edge_platforms:*:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:catalyst_9200_series_switches:*:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:catalyst_9300_series_switches:*:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:catalyst_9400_series_switches:*:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:catalyst_9500_series_switches:*:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:catalyst_9500h_series_switches:*:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:catalyst_9600_series_switches:*:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:catalyst_9800_series_wireless_controllers:*:*:*:*:*:*:*:*
• cpe:2.3:a:cisco_systems:catalyst_cellular_gateways:*:*:*:*:*:*:*:*
• cpe:2.3:a:cisco_systems:catalyst_ess9300_embedded_series_switch:*:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:catalyst_ie3200_rugged_series:*:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:catalyst_ie3300_rugged_series:*:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:catalyst_ie3400_heavy_duty_series:*:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:catalyst_ie3400_rugged_series:*:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:catalyst_ie9300_rugged_series:*:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:cloud_services_router_1000v_series:*:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:esr6300_embedded_series_routers:*:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:embedded_services_3300_series_switches:*:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:integrated_services_virtual_router:*:*:*:*:*:*:*:*
• cpe:2.3:a:cisco_systems:network_convergence_system_500_series_routers:*:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:cbr_series_converged_broadband_routers:*:*:*:*:*:*:*:*

External links

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-rpki-dos-2EgCNeKE

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.