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Fedora 43: python-kdcproxy Advisory CVE-2025-59089 DoS Fix

fedora
Calendar Grey December 5, 2025
Dist Fedora Esm H88
Minnow features in python-kdcproxy fix DoS risk and DNS issues in Fedora 43 update, enhancing security protocols.
New upstream version (1.1.0) Use DNS discovery for declared realms only (CVE-2025-59088) Fix DoS vulnerability based on unbounded TCP buffering (CVE-2025-59089) Stop using deprecat...

Summary

This package contains a Python WSGI module for proxying KDC requests over

HTTP by following the MS-KKDCP protocol. It aims to be simple to deploy, with

minimal configuration.

Update Information:

New upstream version (1.1.0) Use DNS discovery for declared realms only (CVE-2025-59088) Fix DoS vulnerability based on unbounded TCP buffering (CVE-2025-59089) Stop using deprecated %py3_build/%py3_install macros

Topics%20covered

Topics Covered

security advisory fedora DoS python-kdcproxy cve-2025-59089 cve-2025-59088

Change Log

* Wed Nov 19 2025 Julien Rische - 1.1.0-1 - New upstream version (1.1.0) - Use DNS discovery for declared realms only (CVE-2025-59088) Resolves: rhbz#2415861 - Fix DoS vulnerability based on unbounded TCP buffering (CVE-2025-59089) Resolves: rhbz#2415860 - Stop using deprecated \ CFLAGS="${CFLAGS:-${RPM_OPT_FLAGS}}" LDFLAGS="${LDFLAGS:-${RPM_LD_FLAGS}}"\ /usr/bin/python3 setup.py build --executable="/usr/bin/python3 -sP" /\ CFLAGS="${CFLAGS:-${RPM_OPT_FLAGS}}" LDFLAGS="${LDFLAGS:-${RPM_LD_FLAGS}}"\ /usr/bin/python3 setup.py install -O1 --skip-build --root /builddir/build/BUILD/python-kdcproxy-1.1.0-build/BUILDROOT --prefix /usr macros rm -rfv /builddir/build/BUILD/python-kdcproxy-1.1.0-build/BUILDROOT/usr/bin/__pycache__
Resolves: rhbz#2377837

References


[ 1 ] Bug #2377837 - python-kdcproxy: Stop using deprecated %py3_build/%py3_install macros https://bugzilla.redhat.com/show_bug.cgi?id=2377837 [ 2 ] Bug #2415860 - CVE-2025-59089 python-kdcproxy: Remote DoS via unbounded TCP upstream buffering [fedora-43] https://bugzilla.redhat.com/show_bug.cgi?id=2415860 [ 3 ] Bug #2415861 - CVE-2025-59088 python-kdcproxy: Unauthenticated SSRF via Realm\u2011Controlled DNS SRV [fedora-43] https://bugzilla.redhat.com/show_bug.cgi?id=2415861

Update Instructions

This update can be installed with the "dnf" update program. Use su -c 'dnf upgrade --advisory FEDORA-2025-3f9b87b0e7' 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

Severity
important
Lowest
Low
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Critical

Name: python-kdcproxy
Product: Fedora 43
Version: 1.1.0
Release: 1.fc43
URL: https://github.com/latchset/kdcproxy
Summary: MS-KKDCP (kerberos proxy) WSGI module

Topics%20covered

Topics Covered

security advisory fedora DoS python-kdcproxy cve-2025-59089 cve-2025-59088

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