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nghttp2 < 1.41.0 DoS Vulnerability
Information
Severity
Severity
Medium
Family
Family
Denial of Service
CVSSv2 Base
CVSSv2 Base
5.0
CVSSv2 Vector
CVSSv2 Vector
AV:N/AC:L/Au:N/C:N/I:N/A:P
Solution Type
Solution Type
Vendor Patch
Created
Created
3 years ago
Modified
Modified
3 years ago
Summary
nghttpd2 is prone to a denial of service vulnerability due to when receiving an overly large HTTP/2 SETTINGS frame payload.
Insight
Insight
The proof of concept attack involves a malicious client constructing a SETTINGS frame with a length of 14400 bytes (2400 individual settings entries) over and over again. The attack causes the CPU to spike at 100%.
Affected Software
Affected Software
nghttpd2 versions prior to 1.41.0.
Detection Method
Detection Method
Checks if a vulnerable version is present on the target host.
Solution
Solution
Update to version 1.41.0 or later.