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Fedora Update Notification
FEDORA-2015-7878
2015-05-10 04:03:49
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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
Description :
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.

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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)
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ChangeLog:

* Mon May 4 2015 Roland Mainz <rmainz@redhat.com> – 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 <rmainz@redhat.com> – 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 <dwmw2@infradead.org> – 1.12.2-15
– Fix NTLMSSP fallback (#1122324)
* Wed Feb 4 2015 Roland Mainz <rmainz@redhat.com> – 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 <rmainz@redhat.com> – 1.12.2-13
– Support KDC_ERR_MORE_PREAUTH_DATA_REQUIRED (RT#8063)
* Mon Jan 26 2015 Roland Mainz <rmainz@redhat.com> – 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 <rmainz@redhat.com> – 1.12.2-11
– fix for CVE-2014-5354 (#1174546) “krb5: NULL pointer
dereference when using keyless entries”
* Wed Dec 17 2014 Roland Mainz <rmainz@redhat.com> – 1.12.2-10
– fix for CVE-2014-5353 (#1174543) “Fix LDAP misused policy
name crash”
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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
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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 http://docs.fedoraproject.org/yum/.

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
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