CVE-2022-20694: A vulnerability in the implementation of the Resource Public Key Infrastructure (RPKI) feature of Cisco IOS XE Software could allow an unauthenticated...

Description

A vulnerability in the implementation of the Resource Public Key Infrastructure (RPKI) feature of Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause the Border Gateway Protocol (BGP) process to crash, resulting in a denial of service (DoS) condition. This vulnerability is due to the incorrect handling of a specific RPKI to Router (RTR) Protocol packet header. An attacker could exploit this vulnerability by compromising the RPKI validator server and sending a specifically crafted RTR packet to an affected device. Alternatively, the attacker could use man-in-the-middle techniques to impersonate the RPKI validator server and send a crafted RTR response packet over the established RTR TCP connection to the affected device. A successful exploit could allow the attacker to cause a DoS condition because the BGP process could constantly restart and BGP routing could become unstable.

Metrics

CVSS 3.1

6.8/10

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H

EPSS Probability

1.10%

61.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Cisco	Ios Xe	3.7.0bs
Cisco	Ios Xe	3.7.0s
Cisco	Ios Xe	3.7.0xas
Cisco	Ios Xe	3.7.0xbs
Cisco	Ios Xe	3.7.1as
Cisco	Ios Xe	3.7.1s
Cisco	Ios Xe	3.7.2s
Cisco	Ios Xe	3.7.2ts
Cisco	Ios Xe	3.7.3s
Cisco	Ios Xe	3.7.4as
Cisco	Ios Xe	3.7.4s
Cisco	Ios Xe	3.7.5s
Cisco	Ios Xe	3.7.6s
Cisco	Ios Xe	3.7.7s
Cisco	Ios Xe	3.7.8s
Cisco	Ios Xe	3.8.0s
Cisco	Ios Xe	3.8.1s
Cisco	Ios Xe	3.8.2s
Cisco	Ios Xe	3.9.0as
Cisco	Ios Xe	3.9.0s
Cisco	Ios Xe	3.9.0xas
Cisco	Ios Xe	3.9.1as
Cisco	Ios Xe	3.9.1s
Cisco	Ios Xe	3.9.2s
Cisco	Ios Xe	3.10.0s
Cisco	Ios Xe	3.10.1s
Cisco	Ios Xe	3.10.1xbs
Cisco	Ios Xe	3.10.1xcs
Cisco	Ios Xe	3.10.2as
Cisco	Ios Xe	3.10.2s
Cisco	Ios Xe	3.10.2ts
Cisco	Ios Xe	3.10.3s
Cisco	Ios Xe	3.10.4s
Cisco	Ios Xe	3.10.5s
Cisco	Ios Xe	3.10.6s
Cisco	Ios Xe	3.10.7s
Cisco	Ios Xe	3.10.8as
Cisco	Ios Xe	3.10.8s
Cisco	Ios Xe	3.10.9s
Cisco	Ios Xe	3.10.10s
Cisco	Ios Xe	3.11.0s
Cisco	Ios Xe	3.11.1s
Cisco	Ios Xe	3.11.2s
Cisco	Ios Xe	3.11.3s
Cisco	Ios Xe	3.11.4s
Cisco	Ios Xe	3.11.5e
Cisco	Ios Xe	3.12.0as
Cisco	Ios Xe	3.12.0s
Cisco	Ios Xe	3.12.1s
Cisco	Ios Xe	3.12.2s

Showing 50 of 234 affected configurations. See NVD for the full list.

References

Timeline

Published: Apr 15, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2022-20694?

A vulnerability in the implementation of the Resource Public Key Infrastructure (RPKI) feature of Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause the Border Gateway Protocol (BGP) process to crash, resulting in a denial of service (DoS) condition. This vulnerability is due to the incorrect handling of a specific RPKI to Router (RTR) Protocol packet header. An attacker could exploit this vulnerability by compromising the RPKI validator server and sending a specifically crafted RTR packet to an affected device. Alternatively, the attacker could use man-in-the-middle techniques to impersonate the RPKI validator server and send a crafted RTR response packet over the established RTR TCP connection to the affected device. A successful exploit could allow the attacker to cause a DoS condition because the BGP process could constantly restart and BGP routing could become unstable.

How severe is CVE-2022-20694?

CVE-2022-20694 has a CVSS score of 6.8/10 (MEDIUM severity). The EPSS model estimates a 1.10% probability of exploitation in the next 30 days.

How do I fix CVE-2022-20694?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.