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.
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Affected Vendors & Products
References
History
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Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2024-08-04T11:21:14.514Z
Reserved: 2020-03-30T00:00:00
Link: CVE-2020-11080
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Status : Modified
Published: 2020-06-03T23:15:11.073
Modified: 2024-11-21T04:56:44.657
Link: CVE-2020-11080
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