HIGH
Apache ATS 6.0.0 to 6.2.3, 7.0.0 to 7.1.9, and 8.0.0 to 8.0.6 is vulnerable to a HTTP/2 slow read attack
Published Apr 27, 2020
7.5
HIGHCVSS 3.1
EPSS 2.39%
Description
Apache ATS 6.0.0 to 6.2.3, 7.0.0 to 7.1.9, and 8.0.0 to 8.0.6 is vulnerable to a HTTP/2 slow read attack.
Affected products
-
- Version 6.0.0 to 6.2.3StatusaffectedConstraints-
- Version 7.0.0 to 7.1.9StatusaffectedConstraints-
- Version 8.0.0 to 8.0.6StatusaffectedConstraints-
- Version
Configuration 1
OR
- ≥ 6.0.0 · ≤ 6.2.3
- ≥ 7.0.0 · ≤ 7.1.9
- ≥ 8.0.0 · ≤ 8.0.6
Configuration 2
- 10.0
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
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.
2.39% 0.02387
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 3, 2026.
EPSS probability 0.02387
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 (26 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 2.39% (0.02387) | 83.36th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.39% (0.02387) | 81.70th | v5 (v2026.06.15) |
| Jan 27, 2026 | 5.23% (0.05231) | 89.67th | v4 (v2025.03.14) |
| Dec 28, 2025 | 3.92% (0.03921) | 87.94th | v4 (v2025.03.14) |
| Dec 27, 2025 | 2.51% (0.02512) | 85.03th | v4 (v2025.03.14) |
| Nov 21, 2025 | 3.92% (0.03921) | 87.81th | v4 (v2025.03.14) |
| Nov 18, 2025 | 5.23% (0.05231) | 88.94th | v4 (v2025.03.14) |
| Oct 28, 2025 | 3.92% (0.03921) | 87.78th | v4 (v2025.03.14) |
| Oct 27, 2025 | 2.51% (0.02512) | 84.87th | v4 (v2025.03.14) |
| Oct 25, 2025 | 3.92% (0.03921) | 87.77th | v4 (v2025.03.14) |
| Oct 1, 2025 | 5.23% (0.05231) | 89.57th | v4 (v2025.03.14) |
| Jul 30, 2025 | 3.37% (0.03374) | 86.89th | v4 (v2025.03.14) |
| Mar 30, 2025 | 5.23% (0.05231) | 88.98th | v4 (v2025.03.14) |
| Mar 29, 2025 | 6.34% (0.06344) | 84.54th | v4 (v2025.03.14) |
| Mar 19, 2025 | 5.23% (0.05231) | 88.70th | v4 (v2025.03.14) |
| Mar 17, 2025 | 3.92% (0.03921) | 87.53th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.10% (0.00099) | 42.71th | v3 (v2023.03.01) |
| Jul 10, 2024 | 0.10% (0.00099) | 41.43th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.10% (0.00099) | 39.38th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.89% (0.00885) | 27.89th | v2 (v2022.01.01) |
| Apr 1, 2022 | 0.89% (0.00885) | 24.24th | v2 (v2022.01.01) |
| Feb 4, 2022 | 4.50% (0.04499) | 74.08th | v2 (v2022.01.01) |
| Feb 3, 2022 | 7.82% (0.07819) | 84.70th | v1 |
| Jan 6, 2022 | 7.82% (0.07819) | 84.53th | v1 |
| Jan 5, 2022 | 1.85% (0.01855) | 76.52th | v5 (v2026.06.15) |
| Apr 14, 2021 | 1.85% (0.01855) | 0.00th | v1 |
Weaknesses (1)
References (2)
- https://lists.apache.org/thread.html/r21ddaf0a4a973f3c43c7ff399ae50d2f858f13f87bd6a9551c5cf6db%40%3Cannounce.trafficserver.apache.org%3E x_refsource_CONFIRMMailing ListPatchThird Party Advisory
- https://www.debian.org/security/2020/dsa-4672 vendor-advisoryx_refsource_DEBIANThird Party Advisory
| Link | Providers | Tags |
|---|---|---|
| https://lists.apache.org/thread.html/r21ddaf0a4a973f3c43c7ff399ae50d2f858f13f87bd6a9551c5cf6db%40%3Cannounce.trafficserver.apache.org%3E | x_refsource_CONFIRMMailing ListPatchThird Party Advisory | |
| https://www.debian.org/security/2020/dsa-4672 | vendor-advisoryx_refsource_DEBIANThird Party Advisory |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner apache
Published Apr 27, 2020
Updated Aug 4, 2024
Reserved Mar 1, 2020
Link CVE-2020-9481
CISA Vulnrichment
Updated n/a