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CVE-2019-9516

Public on 2019-08-13
Modified on 2019-10-30
Description

A flaw was found in HTTP/2. An attacker, sending a stream of header with a 0-length header name and a 0-length header value, could cause some implementations to allocate memory for these headers and keep the allocations alive until the session dies. The can consume excess memory, potentially leading to a denial of service. The highest threat from this vulnerability is to system availability.

Severity
Important
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CVSS v3 Base Score
6.5
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Affected Packages

Platform Package Release Date Advisory
Amazon Linux 2 - Core mod_http2 2019-10-28 17:43 ALAS2-2019-1342
Amazon Linux 1 nginx 2019-09-30 21:06 ALAS-2019-1299

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv3 6.5 CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD CVSSv2 6.8 AV:N/AC:L/Au:S/C:N/I:N/A:C
NVD CVSSv3 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H