CVE-2021-40085

Common vulnerabilities & exposures (CVE)

CVE database CVE database blogpost Release & EoL database

Published at: - 31-08-2021 08:15

Last modified: - 13-06-2022 09:56

Total changes: - 8

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.

Common Vulnerability Scoring System (CVSS)

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

Low

Attack complexity

Network

Attack vector

None

Availability

None

Confidentiality

High

Integrity

Low

Privileges required

Unchanged

Scope

None

User interaction

6.5

Base score

2.8

3.6

Exploitability score

Impact score

Verification logic

vendor=openstack AND product=neutron AND versionEndExcluding=16.4.1

vendor=openstack AND product=neutron AND versionStartIncluding=18.0.0 AND versionEndExcluding=18.1.1

vendor=openstack AND product=neutron AND versionStartIncluding=17.0.0 AND versionEndExcluding=17.2.1

vendor=Debian AND product=debian_linux AND version=9.0

vendor=Debian AND product=debian_linux AND version=10.0

vendor=Debian AND product=debian_linux AND version=11.0

Reference

https://security.openstack.org/ossa/OSSA-2021-005.html
https://launchpad.net/bugs/1939733
[oss-security] 20210831 [OSSA-2021-005] Neutron: Arbitrary dnsmasq reconfiguration via extra_dhcp_opts (CVE-2021-40085)-Mailing List, Patch, Third Party Advisory
[debian-lts-announce] 20211011 [SECURITY] [DLA 2781-1] neutron security update-Mailing List, Third Party Advisory
DSA-4983-Third Party Advisory
[debian-lts-announce] 20220526 [SECURITY] [DLA 3027-1] neutron security update-Mailing List, Third Party Advisory

Keywords

CVE-2021-40085

Common vulnerabilities & exposures (CVE)

Description

Common Vulnerability Scoring System (CVSS)

Verification logic

Reference

NVD

CVE-2021-40085

CVE

Common vulnerabilities & exposures

CVSS

Common vulnerability scoring system

Security

Vulnerabilities

Exposures