keepalived: Heap-based buffer overflow when parsing HTTP status codes allows for denial of service or possibly arbitrary code execution
Published Nov 8, 2018
9.8
CRITICALCVSS 3.0
EPSS 3.75%
Description
keepalived before 2.0.7 has a heap-based buffer overflow when parsing HTTP status codes resulting in DoS or possibly unspecified other impact, because extract_status_code in lib/html.c has no validation of the status code and instead writes an unlimited amount of data to the heap.
Affected products
No data.
Configuration 1
- < 2.0.7
Configuration 2
- 8.0
Configuration 3
- 7.0
- 7.6
- 7.6
- 7.6
- 7.0
No data.
Red Hat Enterprise Linux 7
keepalived-0:1.3.5-8.el7_6
Fixed · RHSA-2019:0022
Red Hat Enterprise Linux 7.4 Extended Update Support
keepalived-0:1.3.5-1.el7_4.1
Fixed · RHSA-2019:1945
Red Hat Enterprise Linux 7.5 Extended Update Support
keepalived-0:1.3.5-7.el7_5.2
Fixed · RHSA-2019:1792
Red Hat Enterprise Linux 6
keepalived
Will not fix
Red Hat Enterprise Linux 8
keepalived
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 7 | keepalived-0:1.3.5-8.el7_6 | Fixed | RHSA-2019:0022 |
| Red Hat Enterprise Linux 7.4 Extended Update Support | keepalived-0:1.3.5-1.el7_4.1 | Fixed | RHSA-2019:1945 |
| Red Hat Enterprise Linux 7.5 Extended Update Support | keepalived-0:1.3.5-7.el7_5.2 | Fixed | RHSA-2019:1792 |
| Red Hat Enterprise Linux 6 | keepalived | Will not fix | n/a |
| Red Hat Enterprise Linux 8 | keepalived | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This issue affects the versions of keepalived as shipped with Red Hat Enterprise Linux 6 and 7. Red Hat Enterprise Linux 6 is now in Maintenance Support 2 Phase of the support and maintenance life cycle. This has been rated as having a security impact of Important, and is not currently planned to be addressed in future updates. For additional information, refer to the Red Hat Enterprise Linux Life Cycle: https://access.redhat.com/support/policy/updates/errata/.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
1 other source (Red Hat) ▾
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
AV:N/AC:L/Au:N/C:P/I:P/A:P
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 v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (23 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 3.75% (0.03746) | 89.53th | v5 (v2026.06.15) |
| Jun 15, 2026 | 3.67% (0.03675) | 88.19th | v5 (v2026.06.15) |
| Nov 21, 2025 | 6.20% (0.06203) | 90.45th | v4 (v2025.03.14) |
| Nov 18, 2025 | 9.76% (0.09756) | 92.14th | v4 (v2025.03.14) |
| Jul 12, 2025 | 6.50% (0.06497) | 90.66th | v4 (v2025.03.14) |
| Mar 30, 2025 | 3.56% (0.03564) | 86.61th | v4 (v2025.03.14) |
| Mar 29, 2025 | 5.49% (0.05489) | 83.31th | v4 (v2025.03.14) |
| Mar 17, 2025 | 2.99% (0.02986) | 85.63th | v4 (v2025.03.14) |
| Dec 17, 2024 | 0.62% (0.00618) | 78.63th | v3 (v2023.03.01) |
| Jun 27, 2024 | 1.29% (0.01291) | 85.89th | v3 (v2023.03.01) |
| May 10, 2024 | 1.82% (0.01821) | 88.14th | v3 (v2023.03.01) |
| Mar 31, 2024 | 2.15% (0.02150) | 89.10th | v3 (v2023.03.01) |
| Nov 2, 2023 | 2.67% (0.02669) | 89.27th | v3 (v2023.03.01) |
| Jul 8, 2023 | 2.72% (0.02719) | 89.04th | v3 (v2023.03.01) |
| Mar 7, 2023 | 1.65% (0.01645) | 85.57th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.54% (0.01537) | 74.52th | v2 (v2022.01.01) |
| Feb 23, 2023 | 1.54% (0.01537) | 74.48th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.54% (0.01537) | 72.41th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.54% (0.01537) | 51.33th | v2 (v2022.01.01) |
| Feb 3, 2022 | 2.27% (0.02273) | 50.89th | v1 |
| Jan 6, 2022 | 2.27% (0.02273) | 50.38th | v1 |
| Sep 1, 2021 | 2.27% (0.02273) | 77.89th | v1 |
| Apr 14, 2021 | 2.27% (0.02273) | 0.00th | v1 |
References (14)
- https://access.redhat.com/errata/RHSA-2019:0022 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/errata/RHSA-2019:1792 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2019:1945 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/security/cve/CVE-2018-19115 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1651871 Issue Tracking
- https://bugzilla.suse.com/show_bug.cgi?id=1015141 x_refsource_MISCIssue TrackingThird Party Advisory
- https://github.com/acassen/keepalived/pull/961 x_refsource_MISCPatchThird Party Advisory
- https://github.com/acassen/keepalived/pull/961/commits/f28015671a4b04785859d1b4b1327b367b6a10e9 x_refsource_MISCPatchThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/11/msg00034.html mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2018-19115
- https://security.gentoo.org/glsa/201903-01 vendor-advisoryx_refsource_GENTOOThird Party Advisory
- https://usn.ubuntu.com/3995-1/ vendor-advisoryx_refsource_UBUNTU
- https://usn.ubuntu.com/3995-2/ vendor-advisoryx_refsource_UBUNTU
- https://www.cve.org/CVERecord?id=CVE-2018-19115
Change history (0)
No recorded changes yet.