Issued:

2016-11-03

Updated:

2016-11-03

RHSA-2016:2591 - Low: krb5 security, bug fix, and enhancement update

Synopsis

Low: krb5 security, bug fix, and enhancement update

Type/Severity

Security Advisory Low

Topic

An update for krb5 is now available for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having a security impact of Low. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description

Kerberos is a network authentication system, which can improve the security of your network by eliminating the insecure practice of sending passwords over the network in unencrypted form. It allows clients and servers to authenticate to each other with the help of a trusted third party, the Kerberos key distribution center (KDC).

The following packages have been upgraded to a newer upstream version: krb5 (1.14.1). (BZ#1292153)

Security Fix(es):

• A NULL pointer dereference flaw was found in MIT Kerberos kadmind service. An authenticated attacker with permission to modify a principal entry could use this flaw to cause kadmind to dereference a null pointer and crash by supplying an empty DB argument to the modify_principal command, if kadmind was configured to use the LDAP KDB module. (CVE-2016-3119)

• A NULL pointer dereference flaw was found in MIT Kerberos krb5kdc service. An authenticated attacker could use this flaw to cause krb5kdc to dereference a null pointer and crash by making an S4U2Self request, if the restrict_anonymous_to_tgt option was set to true. (CVE-2016-3120)

Additional Changes:

For detailed information on changes in this release, see the Red Hat Enterprise Linux 7.3 Release Notes linked from the References section.

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

After installing the updated packages, running Kerberos services (krb5kdc, kadmin, and kprop) will be restarted automatically.

Affected Products

Updated Packages

• krb5-devel-1.14.1-26.el7.aarch64.rpm
• krb5-devel-1.14.1-26.el7.x86_64.rpm
• krb5-libs-1.14.1-26.el7.i686.rpm
• krb5-devel-1.14.1-26.el7.s390x.rpm
• krb5-pkinit-1.14.1-26.el7.x86_64.rpm
• krb5-debuginfo-1.14.1-26.el7.i686.rpm
• krb5-server-1.14.1-26.el7.ppc64.rpm
• libkadm5-1.14.1-26.el7.ppc64.rpm
• krb5-debuginfo-1.14.1-26.el7.ppc64le.rpm
• krb5-workstation-1.14.1-26.el7.ppc64.rpm
• libkadm5-1.14.1-26.el7.x86_64.rpm
• krb5-workstation-1.14.1-26.el7.aarch64.rpm
• libkadm5-1.14.1-26.el7.i686.rpm
• libkadm5-1.14.1-26.el7.s390x.rpm
• krb5-pkinit-1.14.1-26.el7.aarch64.rpm
• krb5-server-ldap-1.14.1-26.el7.x86_64.rpm
• krb5-server-1.14.1-26.el7.x86_64.rpm
• krb5-server-ldap-1.14.1-26.el7.s390x.rpm
• krb5-workstation-1.14.1-26.el7.x86_64.rpm
• krb5-debuginfo-1.14.1-26.el7.ppc.rpm
• krb5-pkinit-1.14.1-26.el7.ppc64le.rpm
• krb5-devel-1.14.1-26.el7.ppc.rpm
• krb5-devel-1.14.1-26.el7.ppc64.rpm
• krb5-pkinit-1.14.1-26.el7.s390x.rpm
• krb5-1.14.1-26.el7.src.rpm
• krb5-libs-1.14.1-26.el7.ppc64le.rpm
• krb5-server-1.14.1-26.el7.s390x.rpm
• krb5-pkinit-1.14.1-26.el7.ppc64.rpm
• krb5-workstation-1.14.1-26.el7.s390x.rpm
• libkadm5-1.14.1-26.el7.aarch64.rpm
• krb5-server-ldap-1.14.1-26.el7.ppc64le.rpm
• krb5-debuginfo-1.14.1-26.el7.x86_64.rpm
• krb5-workstation-1.14.1-26.el7.ppc64le.rpm
• krb5-libs-1.14.1-26.el7.aarch64.rpm
• krb5-server-1.14.1-26.el7.aarch64.rpm
• krb5-devel-1.14.1-26.el7.i686.rpm
• krb5-devel-1.14.1-26.el7.ppc64le.rpm
• krb5-libs-1.14.1-26.el7.ppc.rpm
• krb5-libs-1.14.1-26.el7.x86_64.rpm
• krb5-server-1.14.1-26.el7.ppc64le.rpm
• libkadm5-1.14.1-26.el7.ppc.rpm
• krb5-debuginfo-1.14.1-26.el7.s390x.rpm
• libkadm5-1.14.1-26.el7.s390.rpm
• krb5-debuginfo-1.14.1-26.el7.s390.rpm
• krb5-libs-1.14.1-26.el7.ppc64.rpm
• krb5-libs-1.14.1-26.el7.s390x.rpm
• krb5-server-ldap-1.14.1-26.el7.ppc64.rpm
• krb5-libs-1.14.1-26.el7.s390.rpm
• krb5-debuginfo-1.14.1-26.el7.ppc64.rpm
• krb5-debuginfo-1.14.1-26.el7.aarch64.rpm
• libkadm5-1.14.1-26.el7.ppc64le.rpm
• krb5-server-ldap-1.14.1-26.el7.aarch64.rpm
• krb5-devel-1.14.1-26.el7.s390.rpm

Fixes

• This content is not included.BZ - 1135427
• This content is not included.BZ - 1146945
• This content is not included.BZ - 1183058
• This content is not included.BZ - 1247261
• This content is not included.BZ - 1256735
• This content is not included.BZ - 1283902
• This content is not included.BZ - 1284987
• This content is not included.BZ - 1290239
• This content is not included.BZ - 1292153
• This content is not included.BZ - 1296241
• This content is not included.BZ - 1297591
• This content is not included.BZ - 1313457
• This content is not included.BZ - 1314493
• This content is not included.BZ - 1319616
• This content is not included.BZ - 1340304
• This content is not included.BZ - 1349042
• This content is not included.BZ - 1361050
• This content is not included.BZ - 1363690
• This content is not included.BZ - 1364993

CVEs

• CVE-2016-3119
• CVE-2016-3120

References

• https://access.redhat.com/security/updates/classification/#low

Additional information

• The Red Hat security contact is This content is not included.secalert@redhat.com. More contact details at https://access.redhat.com/security/team/contact/.
• Offline Security Data data is available for integration with other systems. See Offline Security Data API to get started.