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Red Hat Enterprise Linux 7 RHSA-2018:3071-01 Low: krb5 Network Auth Fix

red hat
Calendar Grey October 30, 2018
Dist Redhat Esm H88
Delve into the Red Hat announcement regarding krb5 security enhancement targeting minor vulnerabilities and ensure your system is up to date.
An update for krb5 is now available for Red Hat Enterprise Linux 7

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.

Summary

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).
Security Fix(es):
* krb5: null dereference in kadmind or DN container check bypass by supplying special crafted data (CVE-2018-5729)
* krb5: DN container check bypass by supplying special crafted data (CVE-2018-5730)
For more details about the security issue(s), including the impact, a CVSS score, and other related information, refer to the CVE page(s) listed in the References section.
Additional Changes:
For detailed information on changes in this release, see the Red Hat Enterprise Linux 7.6 Release Notes linked from the References section.

Topics%20covered

Topics Covered

security advisory bug fix Red Hat Enterprise Linux low severity krb5 update network authentication CVE issues

References

https://access.redhat.com/security/cve/CVE-2018-5729 https://access.redhat.com/security/cve/CVE-2018-5730 https://access.redhat.com/security/updates/classification/#low https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/7.6_release_notes/index

Package List

Red Hat Enterprise Linux Client (v. 7):
Source: krb5-1.15.1-34.el7.src.rpm
x86_64: krb5-debuginfo-1.15.1-34.el7.i686.rpm krb5-debuginfo-1.15.1-34.el7.x86_64.rpm krb5-libs-1.15.1-34.el7.i686.rpm krb5-libs-1.15.1-34.el7.x86_64.rpm krb5-pkinit-1.15.1-34.el7.x86_64.rpm krb5-workstation-1.15.1-34.el7.x86_64.rpm libkadm5-1.15.1-34.el7.i686.rpm libkadm5-1.15.1-34.el7.x86_64.rpm
Red Hat Enterprise Linux Client Optional (v. 7):
x86_64: krb5-debuginfo-1.15.1-34.el7.i686.rpm krb5-debuginfo-1.15.1-34.el7.x86_64.rpm krb5-devel-1.15.1-34.el7.i686.rpm krb5-devel-1.15.1-34.el7.x86_64.rpm krb5-server-1.15.1-34.el7.x86_64.rpm krb5-server-ldap-1.15.1-34.el7.x86_64.rpm
Red Hat Enterprise Linux ComputeNode (v. 7):
Source: krb5-1.15.1-34.el7.src.rpm
x86_64: krb5-debuginfo-1.15.1-34.el7.i686.rpm krb5-debuginfo-1.15.1-34.el7.x86_64.rpm krb5-libs-1.15.1-34.el7.i686.rpm krb5-libs-1.15.1-34.el7.x86_64.rpm krb5-pkinit-1.15.1-34.el7.x86_64.rpm krb5-workstation-1.15.1-34.el7.x86_64.rpm libkadm5-1.15.1-34.el7.i686.rpm libkadm5-1.15.1-34.el7.x86_64.rpm
Red Hat Enterprise Linux ComputeNode Optional (v. 7):
x86_64: krb5-debuginfo-1.15.1-34.el7.i686.rpm krb5-debuginfo-1.15.1-34.el7.x86_64.rpm krb5-devel-1.15.1-34.el7.i686.rpm krb5-devel-1.15.1-34.el7.x86_64.rpm krb5-server-1.15.1-34.el7.x86_64.rpm

Read the Full Advisory


Severity
low
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2018:3071-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2018:3071
Issue date: 2018-10-30

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 impactof Low. A Common Vulnerability Scoring System (CVSS) base score, whichgives a detailed severity rating, is available for each vulnerability fromthe CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory bug fix Red Hat Enterprise Linux low severity krb5 update network authentication CVE issues

Relevant Releases Architectures

Red Hat Enterprise Linux Client (v. 7) - x86_64

Red Hat Enterprise Linux Client Optional (v. 7) - x86_64

Red Hat Enterprise Linux ComputeNode (v. 7) - x86_64

Red Hat Enterprise Linux ComputeNode Optional (v. 7) - x86_64

Red Hat Enterprise Linux Server (v. 7) - ppc64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux Workstation (v. 7) - x86_64

Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) - aarch64, ppc64le, s390x

Bugs Fixed

1373909 - Running systemctl stop kadmin.service causes the status to be failed instead of inactive

1497301 - [RFE] Add German translation (de_DE.UTF-8)

1525232 - Fix network service dependencies

1538491 - certid option of PKINIT plugin does not handle leading zeros

1539824 - Order of processing for files in included directories is undefined

1540130 - [RFE] make preauth types more descriptive in krb5 trace

1551082 - CVE-2018-5730 krb5: DN container check bypass by supplying special crafted data

1551083 - CVE-2018-5729 krb5: null dereference in kadmind or DN container check bypass by supplying special crafted data

1563166 - kdestroy -A does not work with multiple principals when using KCM

1570600 - krb5-libs uses slow crypto implementation

1599721 - ipa-server-install fails when FIPS mode is enabled

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