Reachable Assertion in Cisco IOS XR - CVE-2021-1440
Published: September 9, 2021
Vulnerability identifier: #VU56426
CSH Severity: Medium
CVSS v4: 8.2 [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]
CVE-ID: CVE-2021-1440
CWE-ID: CWE-617
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
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 a denial of service condition on the target system.
Affected software
Cisco IOS XR
How to mitigate CVE-2021-1440
Install updates from vendor's website.
Cisco IOS XR - addressed in versions 7.3.1, 7.3.15, 7.4.1