Debian LTS: DLA-3203-1: nginx security update
Summary
It was discovered that parsing errors in the mp4 module of Nginx, a
high-performance web and reverse proxy server, could result in denial
of service, memory disclosure or potentially the execution of arbitrary
code when processing a malformed mp4 file.
This module is only enabled in the nginx-extras binary package.
In addition the following vulnerability has been fixed.
CVE-2021-3618
ALPACA is an application layer protocol content confusion attack,
exploiting TLS servers implementing different protocols but using
compatible certificates, such as multi-domain or wildcard certificates.
A MiTM attacker having access to victim's traffic at the TCP/IP layer can
redirect traffic from one subdomain to another, resulting in a valid TLS
session. This breaks the authentication of TLS and cross-protocol attacks
may be possible where the behavior of one protocol service may compromise
For Debian 10 buster, these problems have been fixed in version
1.14.2-2+deb10u5.
We recommend that you upgrade your nginx packages.
For the detailed security status of nginx please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/source-package/nginx
Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS
