Red Hat: 2011:0356-01: krb5: Important Advisory
Summary
Kerberos is a network authentication system which allows clients and
servers to authenticate to each other using symmetric encryption and a
trusted third-party, the Key Distribution Center (KDC). The Public Key
Cryptography for Initial Authentication in Kerberos (PKINIT) capability
provides support for using public-key authentication with Kerberos.
A double-free flaw was found in the way the MIT Kerberos KDC handled
initial authentication requests (AS-REQ), when the KDC was configured to
provide the PKINIT capability. A remote attacker could use this flaw to
cause the KDC daemon to abort by using a specially-crafted AS-REQ request.
(CVE-2011-0284)
All krb5 users should upgrade to these updated packages, which contain
a backported patch to correct this issue. After installing the updated
packages, the krb5kdc daemon will be restarted automatically.
Summary
Solution
Before applying this update, make sure all previously-released errata
relevant to your system have been applied.
This update is available via the Red Hat Network. Details on how to
use the Red Hat Network to apply this update are available at
https://access.redhat.com/kb/docs/DOC-11259
References
https://www.redhat.com/security/data/cve/CVE-2011-0284.html https://access.redhat.com/security/updates/classification/#important http://web.mit.edu/kerberos/advisories/MITKRB5-SA-2011-003.txt
Package List
Red Hat Enterprise Linux Desktop (v. 6):
Source:
i386:
krb5-debuginfo-1.8.2-3.el6_0.6.i686.rpm
krb5-libs-1.8.2-3.el6_0.6.i686.rpm
krb5-pkinit-openssl-1.8.2-3.el6_0.6.i686.rpm
krb5-workstation-1.8.2-3.el6_0.6.i686.rpm
x86_64:
krb5-debuginfo-1.8.2-3.el6_0.6.i686.rpm
krb5-debuginfo-1.8.2-3.el6_0.6.x86_64.rpm
krb5-libs-1.8.2-3.el6_0.6.i686.rpm
krb5-libs-1.8.2-3.el6_0.6.x86_64.rpm
krb5-pkinit-openssl-1.8.2-3.el6_0.6.x86_64.rpm
krb5-workstation-1.8.2-3.el6_0.6.x86_64.rpm
Red Hat Enterprise Linux Desktop Optional (v. 6):
Source:
i386:
krb5-debuginfo-1.8.2-3.el6_0.6.i686.rpm
krb5-devel-1.8.2-3.el6_0.6.i686.rpm
krb5-server-1.8.2-3.el6_0.6.i686.rpm
krb5-server-ldap-1.8.2-3.el6_0.6.i686.rpm
x86_64:
krb5-debuginfo-1.8.2-3.el6_0.6.i686.rpm
krb5-debuginfo-1.8.2-3.el6_0.6.x86_64.rpm
krb5-devel-1.8.2-3.el6_0.6.i686.rpm
krb5-devel-1.8.2-3.el6_0.6.x86_64.rpm
krb5-server-1.8.2-3.el6_0.6.x86_64.rpm
krb5-server-ldap-1.8.2-3.el6_0.6.i686.rpm
krb5-server-ldap-1.8.2-3.el6_0.6.x86_64.rpm
Red Hat Enterprise Linux HPC Node (v. 6):
Source:
x86_64:
krb5-debuginfo-1.8.2-3.el6_0.6.i686.rpm
krb5-debuginfo-1.8.2-3.el6_0.6.x86_64.rpm
krb5-libs-1.8.2-3.el6_0.6.i686.rpm
krb5-libs-1.8.2-3.el6_0.6.x86_64.rpm
Red Hat Enterprise Linux HPC Node Optional (v. 6):
Source:
x86_64:
krb5-debuginfo-1.8.2-3.el6_0.6.i686.rpm
krb5-debuginfo-1.8.2-3.el6_0.6.x86_64.rpm
krb5-devel-1.8.2-3.el6_0.6.i686.rpm
krb5-devel-1.8.2-3.el6_0.6.x86_64.rpm
krb5-pkinit-openssl-1.8.2-3.el6_0.6.x86_64.rpm
krb5-server-1.8.2-3.el6_0.6.x86_64.rpm
krb5-server-ldap-1.8.2-3.el6_0.6.i686.rpm
krb5-server-ldap-1.8.2-3.el6_0.6.x86_64.rpm
krb5-workstation-1.8.2-3.el6_0.6.x86_64.rpm
Red Hat Enterprise Linux Server (v. 6):
Source:
i386:
krb5-debuginfo-1.8.2-3.el6_0.6.i686.rpm
krb5-devel-1.8.2-3.el6_0.6.i686.rpm
krb5-libs-1.8.2-3.el6_0.6.i686.rpm
krb5-pkinit-openssl-1.8.2-3.el6_0.6.i686.rpm
krb5-server-1.8.2-3.el6_0.6.i686.rpm
krb5-server-ldap-1.8.2-3.el6_0.6.i686.rpm
krb5-workstation-1.8.2-3.el6_0.6.i686.rpm
ppc64:
krb5-debuginfo-1.8.2-3.el6_0.6.ppc.rpm
krb5-debuginfo-1.8.2-3.el6_0.6.ppc64.rpm
krb5-devel-1.8.2-3.el6_0.6.ppc.rpm
krb5-devel-1.8.2-3.el6_0.6.ppc64.rpm
krb5-libs-1.8.2-3.el6_0.6.ppc.rpm
krb5-libs-1.8.2-3.el6_0.6.ppc64.rpm
krb5-pkinit-openssl-1.8.2-3.el6_0.6.ppc64.rpm
krb5-server-1.8.2-3.el6_0.6.ppc64.rpm
krb5-server-ldap-1.8.2-3.el6_0.6.ppc.rpm
krb5-server-ldap-1.8.2-3.el6_0.6.ppc64.rpm
krb5-workstation-1.8.2-3.el6_0.6.ppc64.rpm
s390x:
krb5-debuginfo-1.8.2-3.el6_0.6.s390.rpm
krb5-debuginfo-1.8.2-3.el6_0.6.s390x.rpm
krb5-devel-1.8.2-3.el6_0.6.s390.rpm
krb5-devel-1.8.2-3.el6_0.6.s390x.rpm
krb5-libs-1.8.2-3.el6_0.6.s390.rpm
krb5-libs-1.8.2-3.el6_0.6.s390x.rpm
krb5-pkinit-openssl-1.8.2-3.el6_0.6.s390x.rpm
krb5-server-1.8.2-3.el6_0.6.s390x.rpm
krb5-server-ldap-1.8.2-3.el6_0.6.s390.rpm
krb5-server-ldap-1.8.2-3.el6_0.6.s390x.rpm
krb5-workstation-1.8.2-3.el6_0.6.s390x.rpm
x86_64:
krb5-debuginfo-1.8.2-3.el6_0.6.i686.rpm
krb5-debuginfo-1.8.2-3.el6_0.6.x86_64.rpm
krb5-devel-1.8.2-3.el6_0.6.i686.rpm
krb5-devel-1.8.2-3.el6_0.6.x86_64.rpm
krb5-libs-1.8.2-3.el6_0.6.i686.rpm
krb5-libs-1.8.2-3.el6_0.6.x86_64.rpm
krb5-pkinit-openssl-1.8.2-3.el6_0.6.x86_64.rpm
krb5-server-1.8.2-3.el6_0.6.x86_64.rpm
krb5-server-ldap-1.8.2-3.el6_0.6.i686.rpm
krb5-server-ldap-1.8.2-3.el6_0.6.x86_64.rpm
krb5-workstation-1.8.2-3.el6_0.6.x86_64.rpm
Red Hat Enterprise Linux Workstation (v. 6):
Source:
i386:
krb5-debuginfo-1.8.2-3.el6_0.6.i686.rpm
krb5-devel-1.8.2-3.el6_0.6.i686.rpm
krb5-libs-1.8.2-3.el6_0.6.i686.rpm
krb5-pkinit-openssl-1.8.2-3.el6_0.6.i686.rpm
krb5-server-1.8.2-3.el6_0.6.i686.rpm
krb5-server-ldap-1.8.2-3.el6_0.6.i686.rpm
krb5-workstation-1.8.2-3.el6_0.6.i686.rpm
x86_64:
krb5-debuginfo-1.8.2-3.el6_0.6.i686.rpm
krb5-debuginfo-1.8.2-3.el6_0.6.x86_64.rpm
krb5-devel-1.8.2-3.el6_0.6.i686.rpm
krb5-devel-1.8.2-3.el6_0.6.x86_64.rpm
krb5-libs-1.8.2-3.el6_0.6.i686.rpm
krb5-libs-1.8.2-3.el6_0.6.x86_64.rpm
krb5-pkinit-openssl-1.8.2-3.el6_0.6.x86_64.rpm
krb5-server-1.8.2-3.el6_0.6.x86_64.rpm
krb5-server-ldap-1.8.2-3.el6_0.6.i686.rpm
krb5-server-ldap-1.8.2-3.el6_0.6.x86_64.rpm
krb5-workstation-1.8.2-3.el6_0.6.x86_64.rpm
These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/#package
![Dist Redhat](/images/distros/dist-redhat.png)
Topic
Updated krb5 packages that fix one security issue are now available for RedHat Enterprise Linux 6.The Red Hat Security Response Team has rated this update as havingimportant security impact. A Common Vulnerability Scoring System (CVSS)base score, which gives a detailed severity rating, is available from theCVE link in the References section.
Topic
Relevant Releases Architectures
Red Hat Enterprise Linux Desktop (v. 6) - i386, x86_64
Red Hat Enterprise Linux Desktop Optional (v. 6) - i386, x86_64
Red Hat Enterprise Linux HPC Node (v. 6) - x86_64
Red Hat Enterprise Linux HPC Node Optional (v. 6) - x86_64
Red Hat Enterprise Linux Server (v. 6) - i386, ppc64, s390x, x86_64
Red Hat Enterprise Linux Workstation (v. 6) - i386, x86_64
Bugs Fixed
674325 - CVE-2011-0284 krb5 (krb5kdc): Double-free flaw by handling error messages upon receiving certain AS_REQ's (MITKRB5-SA-2011-003)