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Fedora 42: python-kdcproxy Critical DoS Issue Addressed 2025-068c570cbf

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). -------------------------------------------------------------------------------- Fedora Update Notification FEDORA-2025-068c570cbf 2025-12-05 02:40:12.305955+00:00 -------------------------------------------------------------------------------- Name : python-kdcproxy Product : Fedora 42 Version : 1.1.0 Release : 1.fc42 URL : https://github.com/latchset/kdcproxy Summary : MS-KKDCP (kerberos proxy) WSGI module Description : 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) -------------------------------------------------------------------------------- ChangeLog: * 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#2414551 - Fix DoS vulnerability based on unbounded TCP buffering (CVE-2025-59089) Resolves: rhbz#2414553 -------------------------------------------------------------------------------- References: [ 1 ] Bug #2414551 - CVE-2025-59088 python-kdcproxy: Unauthenticated SSRF via Realm\u2011Controlled DNS SRV [fedora-42] https://bugzilla.redhat.com/show_bug.cgi?id=2414551 [ 2 ] Bug #2414553 - CVE-2025-59089 python-kdcproxy: Remote DoS via unbounded TCP upstream buffering [fedora-42] https://bugzilla.redhat.com/show_bug.cgi?id=2414553 -------------------------------------------------------------------------------- This update can be installed with the "dnf" update program. Use su -c 'dnf upgrade --advisoryFEDORA-2025-068c570cbf' 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 -------------------------------------------------------------------------------- . Critical update to python-kdcproxy in Fedora 42 fixes DoS issue and improves DNS realm discovery. Install immediately.. Fedora 42, python-kdcproxy, DoS fix, TCP buffering, security advisory. . Severity: Critical. LinuxSecurity.com Team

Dec 05, 2025 •Critical Fedora