Vulnerability · Published Aug 31, 2021 · Assigned by mitre
CVE-2021-40085
Medium 6.5
In plain English
A medium-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 1.8% (higher than 79% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)6.5Medium
Exploit odds (30 days)1.8%top 21.0% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
An issue was discovered in OpenStack Neutron before 16.4.1, 17.x before 17.2.1, and 18.x before 18.1.1. Authenticated attackers can reconfigure dnsmasq via a crafted extra_dhcp_opts value.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | neutron | 2:18.1.0-3 | DEBIAN-CVE-2021-40085 |
| Debian:13 | neutron | 2:18.1.0-3 | DEBIAN-CVE-2021-40085 |
| Debian:14 | neutron | 2:18.1.0-3 | DEBIAN-CVE-2021-40085 |
| PyPI | neutron | 18.1.1 | GHSA-fh73-gjvg-349c |
| PyPI | neutron | 16.4.1, 17.2.1, 18.1.1 | PYSEC-2021-361 |
| PyPI | neutron | 16.4.1 | GHSA-fh73-gjvg-349c |
| PyPI | neutron | 17.2.1 | GHSA-fh73-gjvg-349c |
| Ubuntu:22.04:LTS | neutron | 2:20.3.0-0ubuntu1.1 | USN-6067-1 |
Affected products (as reported)
References
- https://launchpad.net/bugs/1939733 x_refsource_MISC
- [oss-security] 20210831 [OSSA-2021-005] Neutron: Arbitrary dnsmasq reconfiguration via extra_dhcp_opts (CVE-2021-40085) mailing-list, x_refsource_MLIST
- https://security.openstack.org/ossa/OSSA-2021-005.html x_refsource_MISC
- [debian-lts-announce] 20211011 [SECURITY] [DLA 2781-1] neutron security update mailing-list, x_refsource_MLIST
- DSA-4983 vendor-advisory, x_refsource_DEBIAN
- [debian-lts-announce] 20220526 [SECURITY] [DLA 3027-1] neutron security update mailing-list, x_refsource_MLIST