Insufficient verification of data authenticity in openstack-neutron - CVE-2021-20267
Published: May 12, 2023
Vulnerability identifier: #VU76079
CSH Severity: Medium
CVSSv4.0: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2021-20267
CWE-ID: CWE-345
Exploitation vector: Adjecent network
Exploit availability:
No public exploit available
Vulnerable software:
openstack-neutron
openstack-neutron
Software vendor:
Openstack
Openstack
Description
The vulnerability allows a remote attacker to perform MitM attack.
The vulnerability exists due to insufficient verification of data authenticity when processing IPv6 packets in openstack-neutron's default Open vSwitch firewall rules. A remote attacker in control of a server instance connected to the virtual switch can
impersonate the IPv6 addresses of other systems on the network and intercept traffic or perform a denial of service (DoS) attack.
Remediation
Install updates from vendor's website.