Bug 1644510 (CVE-2018-16844) - CVE-2018-16844 nginx: Excessive CPU usage via flaw in HTTP/2 implementation
Summary: CVE-2018-16844 nginx: Excessive CPU usage via flaw in HTTP/2 implementation
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2018-16844
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1647258 1647260 1647262 1648222 1648224 1648225 1650093 1650094 1888169
Blocks: 1644513
TreeView+ depends on / blocked
 
Reported: 2018-10-31 04:07 UTC by Sam Fowler
Modified: 2021-02-16 22:50 UTC (History)
35 users (show)

Fixed In Version: nginx 1.15.6, nginx 1.14.1
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Clone Of:
Environment:
Last Closed: 2019-06-10 10:41:22 UTC
Embargoed:

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Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2018:3680 0 None None None 2018-11-27 09:03:16 UTC
Red Hat Product Errata RHSA-2018:3681 0 None None None 2018-11-27 09:17:38 UTC

Description Sam Fowler 2018-10-31 04:07:20 UTC 
nginx before versions 1.15.6 and 1.14.1 has a vulnerability in the implementation of HTTP/2 that can allow for excessive CPU usage.
Comment 1 Borja Tarraso 2018-11-02 08:48:00 UTC 
Acknowledgments:

Name: the Nginx project
Comment 2 Borja Tarraso 2018-11-02 15:08:29 UTC 
Ansible Tower is not enabling neither using http2 within the nginx configuration file, so it is not affected.
Comment 3 Borja Tarraso 2018-11-02 20:11:10 UTC 
Already did some research and discuss with Satoe I. from CloudForms. CFME is not using in any way nginx more than the inclusion from Ansible Tower (not changed or altered configuration or used outside from Tower), and Ansible Tower is not affected, so CloudForms is also not affected; updating the task accordingly.
Comment 4 Sam Fowler 2018-11-07 00:35:10 UTC 
External Reference:

http://mailman.nginx.org/pipermail/nginx-announce/2018/000220.html
Comment 5 Sam Fowler 2018-11-07 00:36:17 UTC 
Created nginx tracking bugs for this issue:

Affects: epel-all [bug 1647260]
Affects: fedora-all [bug 1647258]
Comment 8 Riccardo Schirone 2018-11-08 10:12:50 UTC 
Upstream patch:
http://hg.nginx.org/nginx/rev/9200b41db765
Comment 9 Riccardo Schirone 2018-11-08 11:41:07 UTC 
Statement:

This issue did not affect the versions of rh-nginx18-nginx as shipped with Red Hat Software Collections as they did not include the vulnerable module ngx_http_v2_module.
Comment 11 errata-xmlrpc 2018-11-27 09:03:05 UTC 
This issue has been addressed in the following products:

  Red Hat Software Collections for Red Hat Enterprise Linux 7
  Red Hat Software Collections for Red Hat Enterprise Linux 7.4 EUS
  Red Hat Software Collections for Red Hat Enterprise Linux 7.5 EUS
  Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUS

Via RHSA-2018:3680 https://access.redhat.com/errata/RHSA-2018:3680
Comment 12 errata-xmlrpc 2018-11-27 09:17:24 UTC 
This issue has been addressed in the following products:

  Red Hat Software Collections for Red Hat Enterprise Linux 7
  Red Hat Software Collections for Red Hat Enterprise Linux 7.4 EUS
  Red Hat Software Collections for Red Hat Enterprise Linux 7.5 EUS
  Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUS

Via RHSA-2018:3681 https://access.redhat.com/errata/RHSA-2018:3681
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