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Fedora 9 pam_krb5 Update 2.3.5 Critical: Authentication Changes

fedora
Calendar Grey June 26, 2009
Dist Fedora Esm H88
This post discusses a significant enhancement to the pam_krb5 module for Fedora 9, resolving various authentication problems and streamlining password requests.
This updates the pam_krb5 package from version 2.3.2 to 2.3.5, fixing CVE-2009-1384: in certain configurations, the password prompt could vary depending on whether or not the user...

Summary

This is pam_krb5, a pluggable authentication module that can be used with

Linux-PAM and Kerberos 5. This module supports password checking, ticket

creation, and optional TGT verification and conversion to Kerberos IV tickets.

The included pam_krb5afs module also gets AFS tokens if so configured.

Update Information:

This updates the pam_krb5 package from version 2.3.2 to 2.3.5, fixing CVE-2009-1384: in certain configurations, the password prompt could vary depending on whether or not the user account was known to the system or the KDC. It also fixes a bug which prevented password change attempts from working if the KDC denied requests for password-changing credentials with settings which would be used for login credentials, and makes the "-n" option for the "afs5log" command work as advertised.

Topics%20covered

Topics Covered

security advisory critical Fedora authentication fix pam_krb5 password prompt KDC

Change Log

* Tue May 26 2009 Nalin Dahyabhai - 2.3.5-1 - catch the case where we pass a NULL initial password into libkrb5 and it uses our callback to ask us for the password for the user using a principal name, and reject that (#502602) - always prompt for a password unless we were told not to (#502602, CVE-2009-1384) * Wed Mar 4 2009 Nalin Dahyabhai - 2.3.4-1 - don't request password-changing credentials with the same options that we use when requesting ticket granting tickets, which might run afoul of KDC policies * Thu Feb 26 2009 Fedora Release Engineering - 2.3.3-2 - Rebuilt for https://fedoraproject.org/wiki/Fedora_11_Mass_Rebuild * Fri Feb 6 2009 Nalin Dahyabhai - 2.3.3-1 - clean up a couple of debug messages * Fri Feb 6 2009 Nalin Dahyabhai - clean up a couple of unclosed pipes to nowhere * Wed Oct 1 2008 Nalin Dahyabhai - 2.3.2-1 - fix ccache permissions bypass when the "existing_ticket" option is used (CVE-2008-3825) * Wed Aug 27 2008 Tom "spot" Callaway - 2.3.0-2 - fix license tag * Wed Apr 9 2008 Nalin Dahyabhai - 2.3.1-1 - don't bother trying to set up a temporary v4 ticket file during session open unless we obtained v4 creds somewhere

References


[ 1 ] Bug #502602 - CVE-2009-1384 pam_krb5: Password prompt varies for existent and non-existent users https://bugzilla.redhat.com/show_bug.cgi?id=502602

Update Instructions

This update can be installed with the "yum" update program. Use su -c 'yum update pam_krb5' at the command line. For more information, refer to "Managing Software with yum", available at .

Severity
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Name: pam_krb5
Product: Fedora 9
Version: 2.3.5
Release: 1.fc9
URL: https://fedoraproject.org/wiki/Infrastructure/Fedorahosted-retirement
Summary: A Pluggable Authentication Module for Kerberos 5.

Topics%20covered

Topics Covered

security advisory critical Fedora authentication fix pam_krb5 password prompt KDC

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