In Apache HTTP Server 2.4.17 to 2.4.34, by sending continuous, large SETTINGS frames a client can occupy a connection, server thread and CPU time without any connection timeout coming to effect. This affects only HTTP/2 connections. A possible mitigation is to not enable the h2 protocol.
Platform | Package | Release Date | Advisory |
---|---|---|---|
Amazon Linux 2 - Core | httpd | 2019-01-23 23:31 | ALAS2-2019-1155 |
Amazon Linux 1 | httpd24 | 2018-12-13 17:29 | ALAS-2018-1104 |
Amazon Linux 2 - Core | mod_http2 | 2018-11-07 22:11 | ALAS2-2018-1104 |
Score Type | Score | Vector | |
---|---|---|---|
Amazon Linux | CVSSv3 | 7.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
NVD | CVSSv2 | 4.3 | AV:N/AC:M/Au:N/C:N/I:N/A:P |
NVD | CVSSv3 | 5.9 | CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H |