Candidate: CVE-2016-4979
PublicDate: 2016-07-06 14:59:00 UTC
References:
 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-4979
 http://marc.info/?l=apache-httpd-announce&m=146773096321832&w=2
Description:
 The Apache HTTP Server 2.4.18 through 2.4.20, when mod_http2 and mod_ssl
 are enabled, does not properly recognize the "SSLVerifyClient require"
 directive for HTTP/2 request authorization, which allows remote attackers
 to bypass intended access restrictions by leveraging the ability to send
 multiple requests over a single connection and aborting a renegotiation.
Ubuntu-Description:
Notes:
 mdeslaur> advisory says introduced in 2.4.18
 mdeslaur> xenial package not built with mod_http2 support
Bugs:
Priority: medium
Discovered-by: Erki Aring
Assigned-to:
CVSS:
 nvd: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N [7.5 HIGH]

Patches_apache2:
 upstream: https://svn.apache.org/r1750779
upstream_apache2: released (2.4.23-1)
precise_apache2: not-affected (code not present)
trusty_apache2: not-affected (code not present)
trusty/esm_apache2: not-affected (code not present)
vivid/stable-phone-overlay_apache2: DNE
vivid/ubuntu-core_apache2: DNE
wily_apache2: not-affected (code not present)
xenial_apache2: not-affected (no mod_http2 support)
esm-infra/xenial_apache2: not-affected (no mod_http2 support)
devel_apache2: not-affected (no mod_http2 support)