CVE-2018-16844

Description

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. This issue affects nginx compiled with the ngx_http_v2_module (not compiled by default) if the 'http2' option of the 'listen' directive is used in a configuration file.

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
CVSS 3.0 •
CVSS 2.0 •
EPSS 6.33% Top 10%
Vendor Advisory debian.org Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory ubuntu.com Vendor Advisory opensuse.org Vendor Advisory nginx.org
Affected: [UNKNOWN] nginx
Published at:
Updated at:

References

Link Tags
https://www.debian.org/security/2018/dsa-4335 third party advisory vendor advisory
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16844 issue tracking
https://access.redhat.com/errata/RHSA-2018:3680 third party advisory vendor advisory
https://access.redhat.com/errata/RHSA-2018:3681 third party advisory vendor advisory
http://www.securityfocus.com/bid/105868 vdb entry third party advisory
http://mailman.nginx.org/pipermail/nginx-announce/2018/000220.html mailing list vendor advisory
http://www.securitytracker.com/id/1042038 vdb entry third party advisory
https://usn.ubuntu.com/3812-1/ third party advisory vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00035.html third party advisory vendor advisory
https://support.apple.com/kb/HT212818 third party advisory
http://seclists.org/fulldisclosure/2021/Sep/36 third party advisory mailing list

Frequently Asked Questions

What is the severity of CVE-2018-16844?
CVE-2018-16844 has been scored as a high severity vulnerability.
How to fix CVE-2018-16844?
To fix CVE-2018-16844, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2018-16844 being actively exploited in the wild?
It is possible that CVE-2018-16844 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~6% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2018-16844?
CVE-2018-16844 affects [UNKNOWN] nginx.
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