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Fedora 21: FEDORA-2015-7878 Moderate: Kerberos Authentication Fix

fedora
Calendar Grey June 21, 2015
Dist Fedora Esm H88
Uncover the Fedora 21 krb5 security patch that tackles numerous vulnerabilities detailed in advisory FEDORA-2015-7879.
Security fix for CVE-2015-2694 Security fix for CVE-2014-5353 (this was fixed in an older build but the announcement was lost)

Summary

Kerberos V5 is a trusted-third-party network authentication system,

which can improve your network's security by eliminating the insecure

practice of sending passwords over the network in unencrypted form.

Update Information:

Security fix for CVE-2015-2694 Security fix for CVE-2014-5353 (this was fixed in an older build but the announcement was lost)

Topics%20covered

Topics Covered

security advisory network security Fedora security fix authentication Kerberos PKINIT

Change Log

* Mon May 4 2015 Roland Mainz - 1.12.2-17 - fix for CVE-2015-2694 (#1216133) "requires_preauth bypass in PKINIT-enabled KDC". In MIT krb5 1.12 and later, when the KDC is configured with PKINIT support, an unauthenticated remote attacker can bypass the requires_preauth flag on a client principal and obtain a ciphertext encrypted in the principal's long-term key. This ciphertext could be used to conduct an off-line dictionary attack against the user's password. * Thu Mar 19 2015 Roland Mainz - 1.12.2-16 - fix for CVE-2014-5355 (#1193939) "krb5: unauthenticated denial of service in recvauth_common() and others" * Tue Mar 17 2015 David Woodhouse - 1.12.2-15 - Fix NTLMSSP fallback (#1122324) * Wed Feb 4 2015 Roland Mainz - 1.12.2-14 - fix for CVE-2014-5352 (#1179856) "gss_process_context_token() incorrectly frees context (MITKRB5-SA-2015-001)" - fix for CVE-2014-9421 (#1179857) "kadmind doubly frees partial deserialization results (MITKRB5-SA-2015-001)" - fix for CVE-2014-9422 (#1179861) "kadmind incorrectly validates server principal name (MITKRB5-SA-2015-001)" - fix for CVE-2014-9423 (#1179863) "libgssrpc server applications leak uninitialized bytes (MITKRB5-SA-2015-001)" * Wed Feb 4 2015 Roland Mainz - 1.12.2-13 - Support KDC_ERR_MORE_PREAUTH_DATA_REQUIRED (RT#8063) * Mon Jan 26 2015 Roland Mainz - 1.12.2-12 - fix for kinit -C loops (#1184629, MIT/krb5 issue 243, "Do not loop on principal unknown errors"). * Thu Dec 18 2014 Roland Mainz - 1.12.2-11 - fix for CVE-2014-5354 (#1174546) "krb5: NULL pointer dereference when using keyless entries" * Wed Dec 17 2014 Roland Mainz - 1.12.2-10 - fix for CVE-2014-5353 (#1174543) "Fix LDAP misused policy name crash"

References


[ 1 ] Bug #1216133 - CVE-2015-2694 krb5: issues in OTP and PKINIT kdcpreauth modules leading to requires_preauth bypass https://bugzilla.redhat.com/show_bug.cgi?id=1216133 [ 2 ] Bug #1174543 - CVE-2014-5353 krb5: NULL pointer dereference when using a ticket policy name as a password policy name https://bugzilla.redhat.com/show_bug.cgi?id=1174543

Update Instructions

This update can be installed with the "yum" update program. Use su -c 'yum update krb5' at the command line. For more information, refer to "Managing Software with yum", available at .

Name: krb5
Product: Fedora 21
Version: 1.12.2
Release: 17.fc21
URL: http://web.mit.edu/kerberos/www/
Summary: The Kerberos network authentication system

Topics%20covered

Topics Covered

security advisory network security Fedora security fix authentication Kerberos PKINIT

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