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USN-4967-2: nginx vulnerability

27 May 2021

nginx could be made to crash or run programs if it received specially crafted network traffic.

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Releases

Packages

  • nginx - small, powerful, scalable web/proxy server

Details

USN-4967-1 fixed a vulnerability in nginx. This update provides
the corresponding update for Ubuntu 14.04 ESM and 16.04 ESM.

Original advisory details:

Luis Merino, Markus Vervier, and Eric Sesterhenn discovered that nginx
incorrectly handled responses to the DNS resolver. A remote attacker could
use this issue to cause nginx to crash, resulting in a denial of service,
or possibly execute arbitrary code.

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 16.04
Ubuntu 14.04

In general, a standard system update will make all the necessary changes.

References

Related notices

  • USN-4967-1: nginx-light, libnginx-mod-stream-geoip, libnginx-mod-http-geoip, libnginx-mod-http-upstream-fair, libnginx-mod-http-auth-pam, libnginx-mod-nchan, libnginx-mod-http-image-filter, libnginx-mod-stream, libnginx-mod-http-xslt-filter, nginx-extras, libnginx-mod-http-uploadprogress, nginx-common, libnginx-mod-http-lua, libnginx-mod-http-subs-filter, libnginx-mod-rtmp, libnginx-mod-stream-geoip2, libnginx-mod-http-headers-more-filter, libnginx-mod-http-perl, libnginx-mod-http-echo, libnginx-mod-http-fancyindex, libnginx-mod-http-dav-ext, libnginx-mod-mail, nginx-core, nginx, libnginx-mod-http-geoip2, libnginx-mod-http-cache-purge, libnginx-mod-http-ndk, nginx-doc, nginx-full