A nginx security update has been released for Fedora 33.

SECURITY: Fedora 33 Update: nginx-1.20.1-2.fc33

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Fedora Update Notification
FEDORA-2021-b37cffac0d
2021-06-11 01:18:48.291633
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Name : nginx
Product : Fedora 33
Version : 1.20.1
Release : 2.fc33
URL :   https://nginx.org
Summary : A high performance web server and reverse proxy server
Description :
Nginx is a web server and a reverse proxy server for HTTP, SMTP, POP3 and
IMAP protocols, with a strong focus on high concurrency, performance and low
memory usage.

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Update Information:

Fix log permissions issue ---- Security: 1-byte memory overwrite might occur
during DNS server response processing if the "resolver" directive was
used, allowing an attacker who is able to forge UDP packets from the DNS
server to cause worker process crash or, potentially, arbitrary code
execution (CVE-2021-23017).
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ChangeLog:

* Tue Jun 1 2021 Felix Kaechele - 1:1.20.1-2
- use different fix for rhbz#1683388 as it introduced permissions issues in 1:1.20.0-2
* Tue May 25 2021 Felix Kaechele - 1:1.20.1-1
- update to 1.20.1 (fixes CVE-2021-23017)
* Fri May 21 2021 Jitka Plesnikova - 1:1.20.0-4
- Perl 5.34 rebuild
* Fri Apr 30 2021 Lubos Uhliarik - 1:1.20.0-3
- Related: #1636235 - centralizing default index.html on nginx
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References:

[ 1 ] Bug #1964820 - CVE-2021-23017 nginx: Off-by-one in ngx_resolver_copy() when labels are followed by a pointer to a root domain name [fedora-all]
  https://bugzilla.redhat.com/show_bug.cgi?id=1964820
[ 2 ] Bug #1966367 - nginx doesn't reopen the log file
  https://bugzilla.redhat.com/show_bug.cgi?id=1966367
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This update can be installed with the "dnf" update program. Use
su -c 'dnf upgrade --advisory FEDORA-2021-b37cffac0d' at the command
line. For more information, refer to the dnf documentation available at
  http://dnf.readthedocs.io/en/latest/command_ref.html#upgrade-command-label

All packages are signed with the Fedora Project GPG key. More details on the
GPG keys used by the Fedora Project can be found at
  https://fedoraproject.org/keys