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CVE-2021-38598

Status Candidate

Overview

OpenStack Neutron before 16.4.1, 17.x before 17.1.3, and 18.0.0 allows hardware address impersonation when the linuxbridge driver with ebtables-nft is used on a Netfilter-based platform. By sending carefully crafted packets, anyone in control of a server instance connected to the virtual switch can impersonate the hardware addresses of other systems on the network, resulting in denial of service or in some cases possibly interception of traffic intended for other destinations.

Related Files

Ubuntu Security Notice USN-6067-1
Posted May 10, 2023
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6067-1 - David Sinquin discovered that OpenStack Neutron incorrectly handled the default Open vSwitch firewall rules. An attacker could possibly use this issue to impersonate the IPv6 addresses of other systems on the network. This issue only affected Ubuntu 18.04 LTS, and Ubuntu 20.04 LTS. Jake Yip and Justin Mammarella discovered that OpenStack Neutron incorrectly handled the linuxbridge driver when ebtables-nft is being used. An attacker could possibly use this issue to impersonate the hardware address of other systems on the network. This issue only affected Ubuntu 18.04 LTS, and Ubuntu 20.04 LTS.

tags | advisory
systems | linux, ubuntu
advisories | CVE-2021-20267, CVE-2021-38598, CVE-2021-40085, CVE-2021-40797, CVE-2022-3277
SHA-256 | 836fc58983503cea6accc902e2c2997895b5dfe647bcd965b113040cafacba9e
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