A haproxy security update has been released for Fedora 34.

SECURITY: Fedora 34 Update: haproxy-2.3.13-1.fc34

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Fedora Update Notification
FEDORA-2021-e6557245e8
2021-08-26 21:07:23.259557
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Name : haproxy
Product : Fedora 34
Version : 2.3.13
Release : 1.fc34
URL :   http://www.haproxy.org/
Summary : HAProxy reverse proxy for high availability environments
Description :
HAProxy is a TCP/HTTP reverse proxy which is particularly suited for high
availability environments. Indeed, it can:
- route HTTP requests depending on statically assigned cookies
- spread load among several servers while assuring server persistence
through the use of HTTP cookies
- switch to backup servers in the event a main one fails
- accept connections to special ports dedicated to service monitoring
- stop accepting connections without breaking existing ones
- add, modify, and delete HTTP headers in both directions
- block requests matching particular patterns
- report detailed status to authenticated users from a URI
intercepted from the application

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Update Information:

Security fix for CVE-2021-39240, CVE-2021-39241, CVE-2021-39242
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ChangeLog:

* Wed Aug 18 2021 Ryan O'Hara - 2.3.13-1
- Update to 2.3.13
- Fix domain parts in :scheme and :path fields (CVE-2021-39240, #1995105)
- Fix spaces in the :method field (CVE-2021-39241, #1995109)
- Fix mismatch between :authority and Host fields (CVE-2021-39242, #1995113)
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References:

[ 1 ] Bug #1995105 - CVE-2021-39240 haproxy: does not ensure that the scheme and path portions of a URI have the expected characters [fedora-all]
  https://bugzilla.redhat.com/show_bug.cgi?id=1995105
[ 2 ] Bug #1995109 - CVE-2021-39241 haproxy: an HTTP method name may contain a space followed by the name of a protected resource [fedora-all]
  https://bugzilla.redhat.com/show_bug.cgi?id=1995109
[ 3 ] Bug #1995113 - CVE-2021-39242 haproxy: it can lead to a situation with an attacker-controlled HTTP Host header because a mismatch between Host and authority is mishandled [fedora-all]
  https://bugzilla.redhat.com/show_bug.cgi?id=1995113
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This update can be installed with the "dnf" update program. Use
su -c 'dnf upgrade --advisory FEDORA-2021-e6557245e8' 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