CVE-2021-40085
MEDIUM
6.5
CVSS Score
Published: August 31, 2021 at 05:32 PM UTC
Updated: June 17, 2026 at 04:06 AM UTC
2 products affected across 2 vendorsDebian LinuxNeutron
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Severity
MEDIUM6.5
Exploit prediction
EPSS 2%
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
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
Debian Linux· Debiandrupal
95%v < 16.4.117.0.0 ≤ v < 17.2.118.0.0 ≤ v < 18.1.1
Affected range stops below 16.4.1, so it looks safe — our inference, not a vendor statement
Affected range stops below 17.2.1, so it looks safe — our inference, not a vendor statement
Affected range stops below 18.1.1, so it looks safe — our inference, not a vendor statement
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
References (6)
Mailing Listx_refsource_MLISTPatchThird Party Advisory
Source: [email protected]
http://www.openwall.com/lists/oss-security/2021/08/31/2x_refsource_MISCExploitIssue TrackingThird Party Advisory
Source: [email protected]
https://launchpad.net/bugs/1939733Mailing Listx_refsource_MLISTThird Party Advisory
Source: [email protected]
https://lists.debian.org/debian-lts-announce/2021/10/msg00005.htmlMailing Listx_refsource_MLISTThird Party Advisory
Source: [email protected]
https://lists.debian.org/debian-lts-announce/2022/05/msg00038.htmlx_refsource_MISCPatchVendor Advisory
Source: [email protected]
https://security.openstack.org/ossa/OSSA-2021-005.htmlVendor Advisoryx_refsource_DEBIANThird Party Advisory
Source: [email protected]
https://www.debian.org/security/2021/dsa-4983CVSS
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- LOW
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- NONE
- Integrity
- HIGH
- Availability
- NONE
Vector?
Quick Info
StatusMODIFIED
CWE
NVD-CWE-noinfo
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