Vulnerability · Published Aug 23, 2021 · Assigned by mitre

CVE-2021-38598

Critical 9.1

In plain English

A critical-severity security flaw in the neutron package (Debian). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.2% (higher than 69% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)9.1Critical

Exploit odds (30 days)1.2%top 31.2% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

Official description

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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Debian:12	neutron	2:18.1.0-2	DEBIAN-CVE-2021-38598
Debian:13	neutron	2:18.1.0-2	DEBIAN-CVE-2021-38598
Debian:14	neutron	2:18.1.0-2	DEBIAN-CVE-2021-38598
PyPI	neutron	no fix listed	GHSA-hvm4-mc7m-22w4
PyPI	neutron	16.4.1, 17.1.3, 18.1.0	PYSEC-2021-360
PyPI	neutron	16.4.1	GHSA-hvm4-mc7m-22w4
PyPI	neutron	17.1.3	GHSA-hvm4-mc7m-22w4
Ubuntu:22.04:LTS	neutron	2:20.3.0-0ubuntu1.1	USN-6067-1

Affected products (as reported)

Vendor	Product	Versions
n/a	n/a	n/a

References

https://launchpad.net/bugs/1938670 x_refsource_MISC