Fedora 34: 2021-393d698493 Critical: Nginx Memory Exploit Risk

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.

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).

* 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

[ 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

su -c 'dnf upgrade --advisory FEDORA-2021-393d698493' at the command

line. For more information, refer to the dnf documentation available at

https://dnf.readthedocs.io/en/latest/command_ref.html

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