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Red Hat Enterprise Linux 6 RHSA-2013:0748-01 Moderate: DoS in krb5 KDC

red hat
Calendar Grey April 16, 2013
Dist Redhat Esm H88
CentOS security notification regarding a moderate krb5 vulnerability affecting the KDC; update specifics provided.
Updated krb5 packages that fix one security issue are now available for Red Hat Enterprise Linux 6

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/articles/11258

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).
A NULL pointer dereference flaw was found in the way the MIT Kerberos KDC processed certain TGS (Ticket-granting Server) requests. A remote, authenticated attacker could use this flaw to crash the KDC via a specially-crafted TGS request. (CVE-2013-1416)
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.

Topics%20covered

Topics Covered

security advisory moderate DoS Red Hat Enterprise Linux krb5 network authentication

References

https://access.redhat.com/security/cve/CVE-2013-1416 https://access.redhat.com/security/updates/classification#moderate

Package List

Red Hat Enterprise Linux Desktop (v. 6):
Source:
i386: krb5-debuginfo-1.10.3-10.el6_4.2.i686.rpm krb5-libs-1.10.3-10.el6_4.2.i686.rpm krb5-pkinit-openssl-1.10.3-10.el6_4.2.i686.rpm krb5-workstation-1.10.3-10.el6_4.2.i686.rpm
x86_64: krb5-debuginfo-1.10.3-10.el6_4.2.i686.rpm krb5-debuginfo-1.10.3-10.el6_4.2.x86_64.rpm krb5-libs-1.10.3-10.el6_4.2.i686.rpm krb5-libs-1.10.3-10.el6_4.2.x86_64.rpm krb5-pkinit-openssl-1.10.3-10.el6_4.2.x86_64.rpm krb5-workstation-1.10.3-10.el6_4.2.x86_64.rpm
Red Hat Enterprise Linux Desktop Optional (v. 6):
Source:
i386: krb5-debuginfo-1.10.3-10.el6_4.2.i686.rpm krb5-devel-1.10.3-10.el6_4.2.i686.rpm krb5-server-1.10.3-10.el6_4.2.i686.rpm krb5-server-ldap-1.10.3-10.el6_4.2.i686.rpm
x86_64: krb5-debuginfo-1.10.3-10.el6_4.2.i686.rpm krb5-debuginfo-1.10.3-10.el6_4.2.x86_64.rpm krb5-devel-1.10.3-10.el6_4.2.i686.rpm krb5-devel-1.10.3-10.el6_4.2.x86_64.rpm krb5-server-1.10.3-10.el6_4.2.x86_64.rpm krb5-server-ldap-1.10.3-10.el6_4.2.i686.rpm krb5-server-ldap-1.10.3-10.el6_4.2.x86_64.rpm
Red Hat Enterprise Linux HPC Node (v. 6):
Source:
x86_64: krb5-debuginfo-1.10.3-10.el6_4.2.i686.rpm krb5-debuginfo-1.10.3-10.el6_4.2.x86_64.rpm krb5-libs-1.10.3-10.el6_4.2.i686.rpm krb5-libs-1.10.3-10.el6_4.2.x86_64.rpm krb5-pkinit-openssl-1.10.3-10.el6_4.2.x86_64.rpm

Read the Full Advisory


Advisory ID: RHSA-2013:0748-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2013:0748.html
Issue date: 2013-04-16

Topic

Updated krb5 packages that fix one security issue are now available forRed Hat Enterprise Linux 6.The Red Hat Security Response Team has rated this update as having moderatesecurity impact. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available from the CVE link inthe References section.

Topics%20covered

Topics Covered

security advisory moderate DoS Red Hat Enterprise Linux krb5 network authentication

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

949984 - CVE-2013-1416 krb5: NULL pointer dereference (DoS, KDC crash) by processing certain TGS requests

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