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

1) Reachable Assertion

EUVDB-ID: #VU62315

Risk: Medium

CVSSv3.1: 5.9 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]

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

External links

http://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.