CVE-2018-16844

high-risk
Published 2018-11-07

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.

Do I need to act?

!
10.9% chance of exploitation in next 30 days
EPSS score — higher than 89% of all CVEs
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
7
CVSS 7.5/10 High
NETWORK / LOW complexity

Affected Products (7)

Affected Vendors

Debian Apple F5 Canonical

References (22)

Third Party Advisory http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00035.html
Mailing List http://mailman.nginx.org/pipermail/nginx-announce/2018/000220.html
Mailing List http://seclists.org/fulldisclosure/2021/Sep/36
Third Party Advisory http://www.securityfocus.com/bid/105868
Third Party Advisory http://www.securitytracker.com/id/1042038
Third Party Advisory https://access.redhat.com/errata/RHSA-2018:3680
Third Party Advisory https://access.redhat.com/errata/RHSA-2018:3681
Issue Tracking https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16844
Third Party Advisory https://support.apple.com/kb/HT212818
Third Party Advisory https://usn.ubuntu.com/3812-1/
Third Party Advisory https://www.debian.org/security/2018/dsa-4335
Third Party Advisory http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00035.html
Mailing List http://mailman.nginx.org/pipermail/nginx-announce/2018/000220.html
Mailing List http://seclists.org/fulldisclosure/2021/Sep/36
Third Party Advisory http://www.securityfocus.com/bid/105868
Third Party Advisory http://www.securitytracker.com/id/1042038
Third Party Advisory https://access.redhat.com/errata/RHSA-2018:3680
Third Party Advisory https://access.redhat.com/errata/RHSA-2018:3681
Issue Tracking https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16844
Third Party Advisory https://support.apple.com/kb/HT212818
and 2 more references
51
/ 100
high-risk
Severity 26/34 · High
Exploitability 11/34 · Low
Exposure 14/34 · Moderate