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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

2 years ago

Modified

Modified

2 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.

Common Vulnerabilities and Exposures (CVE)