Security Advisory - Nov. 6, 2018 - CVE-2018-16843, CVE-2018-16844

[Thomas Ward]

The following was put out in a security advisory notice over nginx-announce's mailing list today:

http://mailman.nginx.org/pipermail/nginx-announce/2018/000220.html

Hello!

Two security issues were identified in nginx HTTP/2 implementation,
which might cause excessive memory consumption (CVE-2018-16843)
and CPU usage (CVE-2018-16844).

The issues affect 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.

The issues affect nginx 1.9.5 - 1.15.5.
The issues are fixed in nginx 1.15.6, 1.14.1.

Thanks to Gal Goldshtein from F5 Networks for initial report of the CPU
usage issue.

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Based on the version strings specified, the following Ubuntu versions of nginx are affected:

* Xenial (1.9.15-0ubuntu1, 1.10.3-0ubuntu0.16.04.2)
* Bionic (1.14.0-0ubuntu1, 1.14.0-0ubuntu1.1)
* Cosmic (1.15.0-0ubuntu1, 1.15.0-0ubuntu2)
* Disco (1.15.0-0ubuntu1, 1.15.0-0ubuntu3)

[Steve Beattie (sbeattie)]

These were addressed in disco in 1.15.6-0ubuntu1, closing. Thanks!