CVE-2021-20267
CVSS V2 Medium 5.5
CVSS V3 High 7.1
Description
A flaw was found in openstack-neutron's default Open vSwitch firewall rules. By sending carefully crafted packets, anyone in control of a server instance connected to the virtual switch can impersonate the IPv6 addresses of other systems on the network, resulting in denial of service or in some cases possibly interception of traffic intended for other destinations. Only deployments using the Open vSwitch driver are affected. Source: OpenStack project. Versions before openstack-neutron 15.3.3, openstack-neutron 16.3.1 and openstack-neutron 17.1.1 are affected.
Overview
- CVE ID
- CVE-2021-20267
- Assigner
- secalert@redhat.com
- Vulnerability Status
- Analyzed
- Published Version
- 2021-05-28T19:15:07
- Last Modified Date
- 2022-10-07T03:00:31
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| cpe:2.3:a:openstack:neutron:*:*:*:*:*:*:*:* | 1 | OR | 16.3.3 | |
| cpe:2.3:a:openstack:neutron:*:*:*:*:*:*:*:* | 1 | OR | 17.0.0 | 17.1.3 |
| cpe:2.3:a:openstack:neutron:18.0.0:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:redhat:openstack_platform:10.0:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:redhat:openstack_platform:13.0:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:redhat:openstack_platform:16.1:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:redhat:openstack_platform:16.2:*:*:*:*:*:*:* | 1 | OR |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:N/AC:L/Au:S/C:P/I:N/A:P
- Access Vector
- NETWORK
- Access Compatibility
- LOW
- Authentication
- SINGLE
- Confidentiality Impact
- PARTIAL
- Integrity Impact
- NONE
- Availability Impact
- PARTIAL
- Base Score
- 5.5
- Severity
- MEDIUM
- Exploitability Score
- 8
- Impact Score
- 4.9
CVSS Version 3
- Version
- 3.1
- Vector String
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H
- Attack Vector
- NETWORK
- Attack Compatibility
- LOW
- Privileges Required
- LOW
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality Impact
- LOW
- Availability Impact
- HIGH
- Base Score
- 7.1
- Base Severity
- HIGH
- Exploitability Score
- 2.8
- Impact Score
- 4.2
References
| Reference URL | Reference Tags |
|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=1934330 | Issue Tracking Patch Third Party Advisory |
| https://security.openstack.org/ossa/OSSA-2021-001.html |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2021-20267 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-20267 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 07:07:29 | Added to TrackCVE | |||
| 2022-12-05 03:14:59 | 2021-05-28T19:15Z | 2021-05-28T19:15:07 | CVE Published Date | updated |
| 2022-12-05 03:14:59 | 2022-10-07T03:00:31 | CVE Modified Date | updated | |
| 2022-12-05 03:14:59 | Analyzed | Vulnerability Status | updated |