HIGH
headerv2.go in mastercactapus proxyprotocol before 0.0.2, as used in the mastercactapus caddy-proxyprotocol plugin through 0.0.2 for Caddy, allows remote attackers to cause a denial of service (webserver panic and daemon crash) via a crafted HAProxy PROXY v2 request with truncated source/destination address data
Published Jul 23, 2019
7.5
HIGHCVSS 3.1
EPSS 4.29%
Description
headerv2.go in mastercactapus proxyprotocol before 0.0.2, as used in the mastercactapus caddy-proxyprotocol plugin through 0.0.2 for Caddy, allows remote attackers to cause a denial of service (webserver panic and daemon crash) via a crafted HAProxy PROXY v2 request with truncated source/destination address data.
Affected products
No data.
- < 0.0.2
No data.
No Red Hat product state for this CVE.
github.com/mastercactapus/proxyprotocol
Go
Introduced 0 Fixed 0.0.2
| Ecosystem | Package | Introduced | Fixed |
|---|---|---|---|
| Go | github.com/mastercactapus/proxyprotocol | 0 | 0.0.2 |
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
7.5 HIGH NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Impact None
Integrity Impact None
Availability Impact High
No CVSS v3.0 score for this CVE.
5.0 MEDIUM NVD
AV:N/AC:L/Au:N/C:N/I:N/A:P
Access Vector Network
Access Complexity Low
Authentication None
Confidentiality Impact None
Integrity Impact None
Availability Impact Partial
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
4.29% 0.04295
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 3, 2026.
EPSS probability 0.04295
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 (16 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 4.29% (0.04295) | 90.83th | v5 (v2026.06.15) |
| Jun 15, 2026 | 4.29% (0.04295) | 89.82th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.37% (0.00374) | 56.96th | v4 (v2025.03.14) |
| Dec 17, 2024 | 2.50% (0.02498) | 89.78th | v3 (v2023.03.01) |
| Jul 16, 2024 | 3.66% (0.03661) | 91.82th | v3 (v2023.03.01) |
| Jun 29, 2023 | 2.93% (0.02932) | 89.40th | v3 (v2023.03.01) |
| Jun 13, 2023 | 2.58% (0.02579) | 88.73th | v3 (v2023.03.01) |
| Mar 7, 2023 | 1.91% (0.01909) | 86.69th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.32% (0.01319) | 71.27th | v2 (v2022.01.01) |
| Feb 23, 2023 | 1.32% (0.01319) | 71.23th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.32% (0.01319) | 69.22th | v2 (v2022.01.01) |
| Feb 4, 2022 | 10.74% (0.10742) | 87.74th | v2 (v2022.01.01) |
| Feb 3, 2022 | 9.94% (0.09940) | 87.27th | v1 |
| Jan 6, 2022 | 9.94% (0.09940) | 87.11th | v1 |
| Sep 1, 2021 | 2.40% (0.02401) | 78.31th | v1 |
| Apr 14, 2021 | 2.40% (0.02401) | 0.00th | v1 |
Weaknesses (1)
References (8)
- https://caddy.community/t/dos-in-http-proxyprotocol-plugin/6014 x_refsource_MISCThird Party Advisory
- https://github.com/advisories/GHSA-85c5-ccm8-vr96 Advisory
- https://github.com/mastercactapus/caddy-proxyprotocol/issues/8 x_refsource_MISCIssue TrackingThird Party Advisory
- https://github.com/mastercactapus/proxyprotocol/commit/5c4a101121fc3e868026189c7a73f7f19eef90ac x_refsource_MISCPatchThird Party Advisory
- https://github.com/mastercactapus/proxyprotocol/compare/ef496d7...5c4a101 x_refsource_MISCThird Party Advisory
- https://github.com/mastercactapus/proxyprotocol/issues/1 x_refsource_MISCExploitThird Party Advisory
- https://github.com/mastercactapus/proxyprotocol/releases/tag/v0.0.2 x_refsource_MISCRelease NotesThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2019-14243
| Link | Providers | Tags |
|---|---|---|
| https://caddy.community/t/dos-in-http-proxyprotocol-plugin/6014 | x_refsource_MISCThird Party Advisory | |
| https://github.com/advisories/GHSA-85c5-ccm8-vr96 | Advisory | |
| https://github.com/mastercactapus/caddy-proxyprotocol/issues/8 | x_refsource_MISCIssue TrackingThird Party Advisory | |
| https://github.com/mastercactapus/proxyprotocol/commit/5c4a101121fc3e868026189c7a73f7f19eef90ac | x_refsource_MISCPatchThird Party Advisory | |
| https://github.com/mastercactapus/proxyprotocol/compare/ef496d7...5c4a101 | x_refsource_MISCThird Party Advisory | |
| https://github.com/mastercactapus/proxyprotocol/issues/1 | x_refsource_MISCExploitThird Party Advisory | |
| https://github.com/mastercactapus/proxyprotocol/releases/tag/v0.0.2 | x_refsource_MISCRelease NotesThird Party Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2019-14243 |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published Jul 23, 2019
Updated Aug 5, 2024
Reserved Jul 23, 2019
Link CVE-2019-14243
CISA Vulnrichment
GHSA-85C5-CCM8-VR96 Updated n/a