CVE-2016-8740
Published: 5 December 2016
The mod_http2 module in the Apache HTTP Server 2.4.17 through 2.4.23, when the Protocols configuration includes h2 or h2c, does not restrict request-header length, which allows remote attackers to cause a denial of service (memory consumption) via crafted CONTINUATION frames in an HTTP/2 request.
Notes
| Author | Note |
|---|---|
| mdeslaur | mod_http2 is not built in Ubuntu because it is considered experimental. |
Priority
Status
| Package | Release | Status |
|---|---|---|
|
apache2 Launchpad, Ubuntu, Debian |
precise |
Not vulnerable
(code not present)
|
| trusty |
Not vulnerable
(code not present)
|
|
| upstream |
Released
(2.4.25-1)
|
|
| xenial |
Not vulnerable
(no mod_http2 support)
|
|
| yakkety |
Not vulnerable
(no mod_http2 support)
|
|
| zesty |
Not vulnerable
(2.4.25-3ubuntu2)
|
|
|
Patches: upstream: https://github.com/apache/httpd/commit/29c63b786ae028d82405421585e91283c8fa0da3 upstream: https://svn.apache.org/viewvc?view=revision&revision=1772579 |
||
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 7.5 |
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity impact | None |
| Availability impact | High |
| Vector | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |