What is wrong
nginx contains a vulnerability in its implementation of HTTP/2. An attacker can exploit this issue to cause excessive memory consumption.
Who is affected
This affects nginx versions prior to 1.15.6 and 1.14.1. It applies if nginx is compiled with the ngx_http_v2_module and uses the 'http2' option of the 'listen' directive.
What to do
Upgrade nginx to version 1.14.1, 1.15.6, or later.
Original 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 memory consumption. 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.
Affected software
- nginx > 1.15.0 < 1.15.6> 1.9.5 < 1.14.1 Fixed in: 1.15.6, 1.14.1 exact match
Details
- Published
- 2018-11-07
- Last modified
- 2024-08-05
- CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L- CWE
- CWE-400
- EPSS (30-day exploit probability)
- 47.99% (percentile 99)
References
- cve.org/CVE-2018-16843
- nvd.nist.gov/vuln/detail/CVE-2018-16843
- www.debian.org/security/2018/dsa-4335
- access.redhat.com/errata/RHSA-2018:3680
- access.redhat.com/errata/RHSA-2018:3681
- www.securityfocus.com/bid/105868
- mailman.nginx.org/pipermail/nginx-announce/2018/000220.html
- www.securitytracker.com/id/1042038
- bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16843
- access.redhat.com/errata/RHSA-2018:3653
- usn.ubuntu.com/3812-1/
- lists.opensuse.org/opensuse-security-announce/2019-09/msg00035.html
- support.apple.com/kb/HT212818
- seclists.org/fulldisclosure/2021/Sep/36
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