Missing Authorization in openstack-neutron - CVE-2021-38598
Published: October 12, 2021
Vulnerability identifier: #VU57243
CSH Severity: Low
CVSS v4: 5.1 [CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-38598
CWE-ID: CWE-862
Exploitation vector: Adjecent network
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform MitM attack.
The vulnerability exists due to missing authorization when the linuxbridge driver with ebtables-nft is used on a Netfilter-based platform. A remote attacker in control of a server instance connected to the virtual switch can send specially crafted packets to impersonate the hardware addresses of other systems on the network.
Affected software
openstack-neutron
Ubuntu
python-neutron (Ubuntu package)
python3-neutron (Ubuntu package)
Ubuntu
python-neutron (Ubuntu package)
python3-neutron (Ubuntu package)
How to mitigate CVE-2021-38598
Install updates from vendor's website.
openstack-neutron - addressed in versions 16.4.1, 17.2.0
python-neutron (Ubuntu package) - update to 2:12.1.1-0ubuntu8.1
python3-neutron (Ubuntu package) - addressed in versions 2:16.4.2-0ubuntu6.2, 2:20.3.0-0ubuntu1.1
python-neutron (Ubuntu package) - update to 2:12.1.1-0ubuntu8.1
python3-neutron (Ubuntu package) - addressed in versions 2:16.4.2-0ubuntu6.2, 2:20.3.0-0ubuntu1.1