Synopsis:          Moderate: krb5 security update
Advisory ID:       SLSA-2015:0794-1
Issue Date:        2015-04-09
CVE Numbers:       CVE-2014-5353
                   CVE-2014-5352
                   CVE-2014-9421
                   CVE-2014-9422
                   CVE-2014-5355
--

The following security issues are fixed with this release:

A use-after-free flaw was found in the way the MIT Kerberos libgssapi_krb5
library processed valid context deletion tokens. An attacker able to make
an application using the GSS-API library (libgssapi) could call the
gss_process_context_token() function and use this flaw to crash that
application. (CVE-2014-5352)

If kadmind were used with an LDAP back end for the KDC database, a remote,
authenticated attacker who has the permissions to set the password policy
could crash kadmind by attempting to use a named ticket policy object as a
password policy for a principal. (CVE-2014-5353)

It was found that the krb5_read_message() function of MIT Kerberos did not
correctly sanitize input, and could create invalid krb5_data objects. A
remote, unauthenticated attacker could use this flaw to crash a Kerberos
child process via a specially crafted request. (CVE-2014-5355)

A double-free flaw was found in the way MIT Kerberos handled invalid
External Data Representation (XDR) data. An authenticated user could use
this flaw to crash the MIT Kerberos administration server (kadmind), or
other applications using Kerberos libraries, via specially crafted XDR
packets. (CVE-2014-9421)

It was found that the MIT Kerberos administration server (kadmind)
incorrectly accepted certain authentication requests for two-component
server principal names. A remote attacker able to acquire a key with a
particularly named principal (such as "kad/x") could use this flaw to
impersonate any user to kadmind, and perform administrative actions as
that user. (CVE-2014-9422)
--

SL6
  x86_64
    krb5-debuginfo-1.10.3-37.el6_6.i686.rpm
    krb5-debuginfo-1.10.3-37.el6_6.x86_64.rpm
    krb5-libs-1.10.3-37.el6_6.i686.rpm
    krb5-libs-1.10.3-37.el6_6.x86_64.rpm
    krb5-pkinit-openssl-1.10.3-37.el6_6.x86_64.rpm
    krb5-workstation-1.10.3-37.el6_6.x86_64.rpm
    krb5-devel-1.10.3-37.el6_6.i686.rpm
    krb5-devel-1.10.3-37.el6_6.x86_64.rpm
    krb5-server-1.10.3-37.el6_6.x86_64.rpm
    krb5-server-ldap-1.10.3-37.el6_6.i686.rpm
    krb5-server-ldap-1.10.3-37.el6_6.x86_64.rpm
  i386
    krb5-debuginfo-1.10.3-37.el6_6.i686.rpm
    krb5-libs-1.10.3-37.el6_6.i686.rpm
    krb5-pkinit-openssl-1.10.3-37.el6_6.i686.rpm
    krb5-workstation-1.10.3-37.el6_6.i686.rpm
    krb5-devel-1.10.3-37.el6_6.i686.rpm
    krb5-server-1.10.3-37.el6_6.i686.rpm
    krb5-server-ldap-1.10.3-37.el6_6.i686.rpm

- Scientific Linux Development Team