Red Hat: 2013:0656-01: krb5: Moderate 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).
When a client attempts to use PKINIT to obtain credentials from the KDC,
the client can specify, using an issuer and serial number, which of the
KDC's possibly-many certificates the client has in its possession, as a
hint to the KDC that it should use the corresponding key to sign its
response. If that specification was malformed, the KDC could attempt to
dereference a NULL pointer and crash. (CVE-2013-1415)
When a client attempts to use PKINIT to obtain credentials from the KDC,
the client will typically format its request to conform to the
specification published in RFC 4556. For interoperability reasons, clients
and servers also provide support for an older, draft version of that
specification. If a client formatted its request to conform to this older
version of the specification, with a non-default key agreement option, it
could cause the KDC to attempt to dereference a NULL pointer and crash.
(CVE-2012-1016)
All krb5 users should upgrade to these updated packages, which contain
backported patches to correct these issues. 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/knowledge/articles/11258
References
https://www.redhat.com/security/data/cve/CVE-2012-1016.html https://www.redhat.com/security/data/cve/CVE-2013-1415.html https://access.redhat.com/security/updates/classification/#moderate https://datatracker.ietf.org/doc/html/rfc4556
Package List
Red Hat Enterprise Linux Desktop (v. 6):
Source:
i386:
krb5-debuginfo-1.10.3-10.el6_4.1.i686.rpm
krb5-libs-1.10.3-10.el6_4.1.i686.rpm
krb5-pkinit-openssl-1.10.3-10.el6_4.1.i686.rpm
krb5-workstation-1.10.3-10.el6_4.1.i686.rpm
x86_64:
krb5-debuginfo-1.10.3-10.el6_4.1.i686.rpm
krb5-debuginfo-1.10.3-10.el6_4.1.x86_64.rpm
krb5-libs-1.10.3-10.el6_4.1.i686.rpm
krb5-libs-1.10.3-10.el6_4.1.x86_64.rpm
krb5-pkinit-openssl-1.10.3-10.el6_4.1.x86_64.rpm
krb5-workstation-1.10.3-10.el6_4.1.x86_64.rpm
Red Hat Enterprise Linux Desktop Optional (v. 6):
Source:
i386:
krb5-debuginfo-1.10.3-10.el6_4.1.i686.rpm
krb5-devel-1.10.3-10.el6_4.1.i686.rpm
krb5-server-1.10.3-10.el6_4.1.i686.rpm
krb5-server-ldap-1.10.3-10.el6_4.1.i686.rpm
x86_64:
krb5-debuginfo-1.10.3-10.el6_4.1.i686.rpm
krb5-debuginfo-1.10.3-10.el6_4.1.x86_64.rpm
krb5-devel-1.10.3-10.el6_4.1.i686.rpm
krb5-devel-1.10.3-10.el6_4.1.x86_64.rpm
krb5-server-1.10.3-10.el6_4.1.x86_64.rpm
krb5-server-ldap-1.10.3-10.el6_4.1.i686.rpm
krb5-server-ldap-1.10.3-10.el6_4.1.x86_64.rpm
Red Hat Enterprise Linux HPC Node (v. 6):
Source:
x86_64:
krb5-debuginfo-1.10.3-10.el6_4.1.i686.rpm
krb5-debuginfo-1.10.3-10.el6_4.1.x86_64.rpm
krb5-libs-1.10.3-10.el6_4.1.i686.rpm
krb5-libs-1.10.3-10.el6_4.1.x86_64.rpm
krb5-pkinit-openssl-1.10.3-10.el6_4.1.x86_64.rpm
krb5-workstation-1.10.3-10.el6_4.1.x86_64.rpm
Red Hat Enterprise Linux HPC Node Optional (v. 6):
Source:
x86_64:
krb5-debuginfo-1.10.3-10.el6_4.1.i686.rpm
krb5-debuginfo-1.10.3-10.el6_4.1.x86_64.rpm
krb5-devel-1.10.3-10.el6_4.1.i686.rpm
krb5-devel-1.10.3-10.el6_4.1.x86_64.rpm
krb5-server-1.10.3-10.el6_4.1.x86_64.rpm
krb5-server-ldap-1.10.3-10.el6_4.1.i686.rpm
krb5-server-ldap-1.10.3-10.el6_4.1.x86_64.rpm
Red Hat Enterprise Linux Server (v. 6):
Source:
i386:
krb5-debuginfo-1.10.3-10.el6_4.1.i686.rpm
krb5-devel-1.10.3-10.el6_4.1.i686.rpm
krb5-libs-1.10.3-10.el6_4.1.i686.rpm
krb5-pkinit-openssl-1.10.3-10.el6_4.1.i686.rpm
krb5-server-1.10.3-10.el6_4.1.i686.rpm
krb5-server-ldap-1.10.3-10.el6_4.1.i686.rpm
krb5-workstation-1.10.3-10.el6_4.1.i686.rpm
ppc64:
krb5-debuginfo-1.10.3-10.el6_4.1.ppc.rpm
krb5-debuginfo-1.10.3-10.el6_4.1.ppc64.rpm
krb5-devel-1.10.3-10.el6_4.1.ppc.rpm
krb5-devel-1.10.3-10.el6_4.1.ppc64.rpm
krb5-libs-1.10.3-10.el6_4.1.ppc.rpm
krb5-libs-1.10.3-10.el6_4.1.ppc64.rpm
krb5-pkinit-openssl-1.10.3-10.el6_4.1.ppc64.rpm
krb5-server-1.10.3-10.el6_4.1.ppc64.rpm
krb5-server-ldap-1.10.3-10.el6_4.1.ppc.rpm
krb5-server-ldap-1.10.3-10.el6_4.1.ppc64.rpm
krb5-workstation-1.10.3-10.el6_4.1.ppc64.rpm
s390x:
krb5-debuginfo-1.10.3-10.el6_4.1.s390.rpm
krb5-debuginfo-1.10.3-10.el6_4.1.s390x.rpm
krb5-devel-1.10.3-10.el6_4.1.s390.rpm
krb5-devel-1.10.3-10.el6_4.1.s390x.rpm
krb5-libs-1.10.3-10.el6_4.1.s390.rpm
krb5-libs-1.10.3-10.el6_4.1.s390x.rpm
krb5-pkinit-openssl-1.10.3-10.el6_4.1.s390x.rpm
krb5-server-1.10.3-10.el6_4.1.s390x.rpm
krb5-server-ldap-1.10.3-10.el6_4.1.s390.rpm
krb5-server-ldap-1.10.3-10.el6_4.1.s390x.rpm
krb5-workstation-1.10.3-10.el6_4.1.s390x.rpm
x86_64:
krb5-debuginfo-1.10.3-10.el6_4.1.i686.rpm
krb5-debuginfo-1.10.3-10.el6_4.1.x86_64.rpm
krb5-devel-1.10.3-10.el6_4.1.i686.rpm
krb5-devel-1.10.3-10.el6_4.1.x86_64.rpm
krb5-libs-1.10.3-10.el6_4.1.i686.rpm
krb5-libs-1.10.3-10.el6_4.1.x86_64.rpm
krb5-pkinit-openssl-1.10.3-10.el6_4.1.x86_64.rpm
krb5-server-1.10.3-10.el6_4.1.x86_64.rpm
krb5-server-ldap-1.10.3-10.el6_4.1.i686.rpm
krb5-server-ldap-1.10.3-10.el6_4.1.x86_64.rpm
krb5-workstation-1.10.3-10.el6_4.1.x86_64.rpm
Red Hat Enterprise Linux Workstation (v. 6):
Source:
i386:
krb5-debuginfo-1.10.3-10.el6_4.1.i686.rpm
krb5-devel-1.10.3-10.el6_4.1.i686.rpm
krb5-libs-1.10.3-10.el6_4.1.i686.rpm
krb5-pkinit-openssl-1.10.3-10.el6_4.1.i686.rpm
krb5-server-1.10.3-10.el6_4.1.i686.rpm
krb5-server-ldap-1.10.3-10.el6_4.1.i686.rpm
krb5-workstation-1.10.3-10.el6_4.1.i686.rpm
x86_64:
krb5-debuginfo-1.10.3-10.el6_4.1.i686.rpm
krb5-debuginfo-1.10.3-10.el6_4.1.x86_64.rpm
krb5-devel-1.10.3-10.el6_4.1.i686.rpm
krb5-devel-1.10.3-10.el6_4.1.x86_64.rpm
krb5-libs-1.10.3-10.el6_4.1.i686.rpm
krb5-libs-1.10.3-10.el6_4.1.x86_64.rpm
krb5-pkinit-openssl-1.10.3-10.el6_4.1.x86_64.rpm
krb5-server-1.10.3-10.el6_4.1.x86_64.rpm
krb5-server-ldap-1.10.3-10.el6_4.1.i686.rpm
krb5-server-ldap-1.10.3-10.el6_4.1.x86_64.rpm
krb5-workstation-1.10.3-10.el6_4.1.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
Topic
Updated krb5 packages that fix two security issues are now available forRed Hat Enterprise Linux 6.The Red Hat Security Response Team has rated this update as having moderatesecurity impact. Common Vulnerability Scoring System (CVSS) base scores,which give detailed severity ratings, are available for each vulnerabilityfrom the CVE links 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
914749 - CVE-2013-1415 krb5: PKINIT null pointer deref leads to DoS (pkinit_check_kdc_pkid())
917840 - CVE-2012-1016 krb5: PKINIT null pointer deref leads to DoS