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CVE-2021-40085 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:6.5 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.

URL	Source(s)	Tag(s)
https://launchpad.net/bugs/1939733	CVE	ExploitIssue TrackingThird Party Advisory
https://lists.debian.org/debian-lts-announce/2021/10/msg00005.html	CVE	Mailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2022/05/msg00038.html	CVE	Mailing ListThird Party Advisory
https://security.openstack.org/ossa/OSSA-2021-005.html	CVE	PatchVendor Advisory
https://www.debian.org/security/2021/dsa-4983	CVE	Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/08/31/2	CVE	Mailing ListPatchThird Party Advisory
https://launchpad.net/bugs/1939733	[email protected]	ExploitIssue TrackingThird Party Advisory
https://lists.debian.org/debian-lts-announce/2021/10/msg00005.html	[email protected]	Mailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2022/05/msg00038.html	[email protected]	Mailing ListThird Party Advisory
https://security.openstack.org/ossa/OSSA-2021-005.html	[email protected]	PatchVendor Advisory
https://www.debian.org/security/2021/dsa-4983	[email protected]	Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/08/31/2	[email protected]	Mailing ListPatchThird Party Advisory

see all 12 references

Weakness Enumeration

CWE-ID	CWE Name	Source
NVD-CWE-noinfo	Insufficient Information to Classify Weakness	[email protected]

Affected Products

Product	Versions
openstack neutron	< 16.4.1 >= 17.0.0, < 17.2.1 >= 18.0.0, < 18.1.1
CPE cpe:2.3:a:openstack:neutron:::::::: Remediation No remediation found in references.
debian debian linux	9.0 10.0 11.0
CPE cpe:2.3:o:debian:debian_linux:9.0:::::::* cpe:2.3:o:debian:debian_linux:10.0:::::::* cpe:2.3:o:debian:debian_linux:11.0:::::::* Remediation No remediation found in references.

Change History

9 change records found show changes

Date	Action	Recorded By
Jun 17, 2026	CVE Modified	[email protected]
Nov 21, 2024	CVE Modified	CVE
May 14, 2024	CVE Modified	[email protected]
Jun 13, 2022	Modified Analysis	[email protected]
May 26, 2022	CVE Modified	[email protected]
Nov 30, 2021	Modified Analysis	[email protected]
Oct 11, 2021	CVE Modified	[email protected]
Oct 11, 2021	CVE Modified	[email protected]
Sep 8, 2021	Initial Analysis	[email protected]