CVE-2018-11763
Published: 25 September 2018
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.
Notes
Author | Note |
---|---|
mdeslaur | artful and older don't enable http2 in the build. see CVE-2018-1302 for a whole http2 backport requirement |
Priority
Status
Package | Release | Status |
---|---|---|
apache2 Launchpad, Ubuntu, Debian |
upstream |
Released
(2.4.35)
|
trusty |
Not vulnerable
(code not present)
|
|
xenial |
Not vulnerable
(code not built)
|
|
bionic |
Released
(2.4.29-1ubuntu4.4)
|
|
Patches: upstream: https://svn.apache.org/viewvc?view=revision&revision=1840757 (2.4.x) upstream: https://github.com/apache/httpd/commit/484aba5048e3457dc1d15189f1910d007b1a4a76 |
Severity score breakdown
Parameter | Value |
---|---|
Base score | 5.9 |
Attack vector | Network |
Attack complexity | High |
Privileges required | None |
User interaction | None |
Scope | Unchanged |
Confidentiality | None |
Integrity impact | None |
Availability impact | High |
Vector | CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H |