CVE-2019-9516

Public on 2019-09-30
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
CVSS v3 Base Score
6.5
See breakdown

Affected Packages

Platform Package Release Date Advisory
Amazon Linux 2 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