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USN-5371-3: nginx vulnerability

7 October 2022

A security issue was fixed in nginx's lua module.

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Releases

Packages

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

Details

USN-5371-1 and USN-5371-2 fixed several vulnerabilities in nginx.
This update provides the corresponding update for CVE-2020-11724
for Ubuntu 16.04 ESM.

Original advisory details:

It was discovered that nginx Lua module mishandled certain inputs.
An attacker could possibly use this issue to perform an HTTP Request
Smuggling attack. This issue was fixed for Ubuntu 18.04 LTS and
Ubuntu 20.04 LTS. (CVE-2020-11724)

It was discovered that nginx Lua module mishandled certain inputs.
An attacker could possibly use this issue to disclose sensitive
information. This issue only affects Ubuntu 18.04 LTS and
Ubuntu 20.04 LTS. (CVE-2020-36309)

It was discovered that nginx mishandled the use of
compatible certificates among multiple encryption protocols.
If a remote attacker were able to intercept the communication,
this issue could be used to redirect traffic between subdomains.
(CVE-2021-3618)

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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.

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Update instructions

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

Ubuntu 16.04

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

References

Related notices

  • USN-5371-1: libnginx-mod-http-fancyindex, libnginx-mod-http-upstream-fair, libnginx-mod-http-xslt-filter, libnginx-mod-http-geoip2, nginx-light, nginx, libnginx-mod-http-headers-more-filter, libnginx-mod-http-cache-purge, libnginx-mod-http-ndk, libnginx-mod-http-lua, nginx-doc, nginx-core, libnginx-mod-http-echo, nginx-common, libnginx-mod-stream-geoip2, libnginx-mod-nchan, libnginx-mod-http-uploadprogress, libnginx-mod-stream, libnginx-mod-http-geoip, libnginx-mod-stream-geoip, libnginx-mod-rtmp, nginx-extras, libnginx-mod-mail, libnginx-mod-http-dav-ext, libnginx-mod-http-perl, nginx-full, libnginx-mod-http-subs-filter, libnginx-mod-http-auth-pam, libnginx-mod-http-image-filter

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Further reading