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 mali...
Summary
Denial of service in nghttp2
Original description
The description as published by the source.
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.
Source: OSV.dev (Open Source Vulnerabilities) NVD GitHub Advisory OSV
Affected packages
Fix status by distribution
Fixed packages published by each distribution for this CVE
- Alpine Linux ALPINE-CVE-2020-11080 nghttp2 Fixed in: 1.39.2-r1
- Debian DEBIAN-CVE-2020-11080 nghttp2 Fixed in: 1.41.0-1
References
- advisory lists.opensuse.org
- advisory lists.debian.org
- advisory debian.org
- advisory oracle.com
- advisory oracle.com
- advisory oracle.com
- advisory oracle.com
- patch github.com
- patch github.com
- patch github.com
- patch oracle.com
- web lists.debian.org
- web lists.fedoraproject.org
- web lists.fedoraproject.org
- web nvd.nist.gov