Resource exhaustion in Cisco IOS XR - CVE-2020-3190
Published: March 5, 2020
Vulnerability identifier: #VU25786
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2020-3190
CWE-ID: CWE-400
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 improper handling of packets by the IPsec packet processor. A remote attacker can send malicious ICMP error messages to an affected device that get punted to the IPsec packet processor, trigger resource exhaustion and perform a denial of service (DoS) attack.
Affected software
Cisco IOS XR
How to mitigate CVE-2020-3190
Install updates from vendor's website.
Cisco IOS XR - addressed in versions 6.4.3, 6.6.3, 7.0.2, 7.1.1