The HTTP/2 experimental feature in Apache Traffic Server 5.3.x before 5.3.1 allows remote attackers to cause a denial of service (out-of-bounds access and daemon crash) or possibly execute arbitrary code via vectors related to the (1) frame_handlers array or (2) set_dynamic_table_size function
Published Oct 30, 2017
9.8
CRITICALCVSS 3.0
EPSS 5.44%
Description
The HTTP/2 experimental feature in Apache Traffic Server 5.3.x before 5.3.1 allows remote attackers to cause a denial of service (out-of-bounds access and daemon crash) or possibly execute arbitrary code via vectors related to the (1) frame_handlers array or (2) set_dynamic_table_size function.
Affected products
No data.
- 5.3.0
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.
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
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 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (17 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 5.44% (0.05438) | 92.47th | v5 (v2026.06.15) |
| Jun 15, 2026 | 5.44% (0.05438) | 91.67th | v5 (v2026.06.15) |
| Mar 30, 2025 | 3.79% (0.03792) | 87.01th | v4 (v2025.03.14) |
| Mar 29, 2025 | 9.71% (0.09707) | 88.11th | v4 (v2025.03.14) |
| Mar 17, 2025 | 3.79% (0.03792) | 87.30th | v4 (v2025.03.14) |
| Dec 17, 2024 | 1.55% (0.01546) | 86.81th | v3 (v2023.03.01) |
| Nov 8, 2023 | 5.50% (0.05498) | 92.39th | v3 (v2023.03.01) |
| Oct 10, 2023 | 2.02% (0.02016) | 87.58th | v3 (v2023.03.01) |
| Sep 9, 2023 | 2.05% (0.02049) | 87.60th | v3 (v2023.03.01) |
| Aug 15, 2023 | 1.46% (0.01464) | 85.05th | v3 (v2023.03.01) |
| May 2, 2023 | 0.73% (0.00733) | 78.02th | v3 (v2023.03.01) |
| Mar 23, 2023 | 0.69% (0.00694) | 77.13th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.75% (0.00746) | 77.99th | v3 (v2023.03.01) |
| Mar 6, 2023 | 3.79% (0.03795) | 85.54th | v2 (v2022.01.01) |
| Jul 27, 2022 | 3.79% (0.03795) | 84.71th | v2 (v2022.01.01) |
| Apr 1, 2022 | 3.69% (0.03693) | 83.51th | v2 (v2022.01.01) |
| Feb 4, 2022 | 3.69% (0.03693) | 66.67th | v2 (v2022.01.01) |
References (3)
- http://mail-archives.us.apache.org/mod_mbox/www-announce/201507.mbox/%3CCABF6JR37mWzDmXDqRQwRUXiojBZrhidndnsY1ZgmcZv-o7-a+g%40mail.gmail.com%3E mailing-listx_refsource_MLIST
- http://www.securityfocus.com/bid/101631 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- https://yahoo-security.tumblr.com/post/122883273670/apache-traffic-server-http2-fuzzing x_refsource_MISCIssue TrackingThird Party Advisory
| Link | Providers | Tags |
|---|---|---|
| http://mail-archives.us.apache.org/mod_mbox/www-announce/201507.mbox/%3CCABF6JR37mWzDmXDqRQwRUXiojBZrhidndnsY1ZgmcZv-o7-a+g%40mail.gmail.com%3E | mailing-listx_refsource_MLIST | |
| http://www.securityfocus.com/bid/101631 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| https://yahoo-security.tumblr.com/post/122883273670/apache-traffic-server-http2-fuzzing | x_refsource_MISCIssue TrackingThird Party Advisory |
Change history (0)
No recorded changes yet.