openstack-neutron: DOS via broken port range merging in security group
Published Apr 5, 2019
7.1
HIGHCVSS 4.0
EPSS 1.73%
Description
An issue was discovered in OpenStack Neutron 11.x before 11.0.7, 12.x before 12.0.6, and 13.x before 13.0.3. By creating two security groups with separate/overlapping port ranges, an authenticated user may prevent Neutron from being able to configure networks on any compute nodes where those security groups are present, because of an Open vSwitch (OVS) firewall KeyError. All Neutron deployments utilizing neutron-openvswitch-agent are affected.
Affected products
No data.
No data.
Red Hat OpenStack Platform 13.0 (Queens)
openstack-neutron-1:12.0.5-11.el7ost
Fixed · RHSA-2019:0935
Red Hat OpenStack Platform 14.0 (Rocky)
openstack-neutron-1:13.0.3-0.20190313155649.00b63be.el7ost
Fixed · RHSA-2019:0879
Red Hat OpenStack Platform 10 (Newton)
openstack-neutron
Not affected
Red Hat OpenStack Platform 15 (Stein)
openstack-neutron
Not affected
Red Hat OpenStack Platform 8 (Liberty)
openstack-neutron
Not affected
Red Hat OpenStack Platform 9 (Mitaka)
openstack-neutron
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat OpenStack Platform 13.0 (Queens) | openstack-neutron-1:12.0.5-11.el7ost | Fixed | RHSA-2019:0935 |
| Red Hat OpenStack Platform 14.0 (Rocky) | openstack-neutron-1:13.0.3-0.20190313155649.00b63be.el7ost | Fixed | RHSA-2019:0879 |
| Red Hat OpenStack Platform 10 (Newton) | openstack-neutron | Not affected | n/a |
| Red Hat OpenStack Platform 15 (Stein) | openstack-neutron | Not affected | n/a |
| Red Hat OpenStack Platform 8 (Liberty) | openstack-neutron | Not affected | n/a |
| Red Hat OpenStack Platform 9 (Mitaka) | openstack-neutron | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
The pre-requisites for this vulnerability are not in Red Hat OpenStack prior to version 11, hence these versions are not affected.
Metrics
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
1 other source (Red Hat) ▾
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
AV:N/AC:L/Au:S/C:P/I:N/A:N
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 3, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Table of values (13 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 1.73% (0.01725) | 76.74th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.76% (0.01757) | 74.97th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.90% (0.00897) | 73.99th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.39% (0.00389) | 74.10th | v3 (v2023.03.01) |
| Mar 29, 2024 | 0.27% (0.00274) | 67.48th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.13% (0.00127) | 45.65th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.03% (0.01034) | 41.69th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.03% (0.01034) | 37.91th | v2 (v2022.01.01) |
| Feb 4, 2022 | 11.57% (0.11569) | 88.81th | v2 (v2022.01.01) |
| Feb 3, 2022 | 6.21% (0.06208) | 81.93th | v1 |
| Jan 6, 2022 | 6.21% (0.06208) | 81.75th | v1 |
| Jan 5, 2022 | 1.45% (0.01454) | 72.86th | v5 (v2026.06.15) |
| Apr 14, 2021 | 1.45% (0.01454) | 0.00th | v1 |
References (12)
- http://www.openwall.com/lists/oss-security/2019/04/09/2 mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- https://access.redhat.com/errata/RHSA-2019:0879 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/errata/RHSA-2019:0935 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2019-10876 Vendor Advisory
- https://bugs.launchpad.net/ossa/+bug/1813007 x_refsource_MISCIssue TrackingThird Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1695883 Issue Tracking
- https://github.com/advisories/GHSA-jr9m-v5qh-mh2j Advisory
- https://github.com/pypa/advisory-database/tree/main/vulns/neutron/PYSEC-2019-189.yaml
- https://nvd.nist.gov/vuln/detail/CVE-2019-10876
- https://review.openstack.org/#/q/topic:bug/1813007 x_refsource_MISCVendor Advisory
- https://security.openstack.org/ossa/OSSA-2019-002.html x_refsource_CONFIRMThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2019-10876
| Link | Providers | Tags |
|---|---|---|
| http://www.openwall.com/lists/oss-security/2019/04/09/2 | mailing-listx_refsource_MLISTMailing ListThird Party Advisory | |
| https://access.redhat.com/errata/RHSA-2019:0879 | vendor-advisoryx_refsource_REDHATThird Party Advisory | |
| https://access.redhat.com/errata/RHSA-2019:0935 | vendor-advisoryx_refsource_REDHATThird Party Advisory | |
| https://access.redhat.com/security/cve/CVE-2019-10876 | Vendor Advisory | |
| https://bugs.launchpad.net/ossa/+bug/1813007 | x_refsource_MISCIssue TrackingThird Party Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1695883 | Issue Tracking | |
| https://github.com/advisories/GHSA-jr9m-v5qh-mh2j | Advisory | |
| https://github.com/pypa/advisory-database/tree/main/vulns/neutron/PYSEC-2019-189.yaml | ||
| https://nvd.nist.gov/vuln/detail/CVE-2019-10876 | ||
| https://review.openstack.org/#/q/topic:bug/1813007 | x_refsource_MISCVendor Advisory | |
| https://security.openstack.org/ossa/OSSA-2019-002.html | x_refsource_CONFIRMThird Party Advisory | |
| https://www.cve.org/CVERecord?id=CVE-2019-10876 |
Change history (0)
No recorded changes yet.