VDB
CISA-2020-11080
CISA-2020-11080
PUBLISHED
CVSS 3.7 LOW
Reported by GitHub_M · Published June 3, 2020
In nghttp2 before version 1.41.0, the overly large HTTP/2 SETTINGS frame payload causes denial of service. The proof of concept attack involves a malicious client constructing a SETTINGS frame with a length of 14,400 bytes (2400 individual settings entries) over and over again. The attack causes the CPU to spike at 100%. nghttp2 v1.41.0 fixes this vulnerability. There is a workaround to this vulnerability. Implement nghttp2_on_frame_recv_callback callback, and if received frame is SETTINGS frame and the number of settings entries are large (e.g., > 32), then drop the connection.
Risk Scores
CVSS 3.1
3.7
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| nghttp2 | nghttp2 | < 1.41.0 |
| nghttp2 | nghttp2 | *, * |
Timeline
- Jun 3, 2020 CVE Published
- Jun 9, 2025 CVE Updated
- Apr 26, 2026 Distribution Patch
- Apr 26, 2026 Security Advisory
- Apr 26, 2026 Security Advisory
References
- DSA-4696 vendor-advisory
- openSUSE-SU-2020:0802 vendor-advisory
- FEDORA-2020-f7d15c8b77 vendor-advisory
- FEDORA-2020-43d5a372fc vendor-advisory
- [debian-lts-announce] 20211017 [SECURITY] [DLA 2786-1] nghttp2 security update mailing-list
- [debian-lts-announce] 20231016 [SECURITY] [DLA 3621-1] nghttp2 security update mailing-list