Issued:

2023-05-09

Updated:

2023-05-09

RHSA-2023:2570 - Moderate: krb5 security, bug fix, and enhancement update

Synopsis

Moderate: krb5 security, bug fix, and enhancement update

Type/Severity

Security Advisory Moderate

Topic

An update for krb5 is now available for Red Hat Enterprise Linux 9.

Red Hat Product Security has rated this update as having a security impact of Moderate. 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 later upstream version: krb5 (1.20.1). (BZ#2016312)

Security Fix(es):

• Kerberos: delegation constrain bypass in S4U2Proxy (CVE-2020-17049)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, 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 9.2 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-1.20.1-8.el9.x86_64.rpm
• krb5-server-debuginfo-1.20.1-8.el9.aarch64.rpm
• krb5-server-ldap-debuginfo-1.20.1-8.el9.aarch64.rpm
• krb5-libs-1.20.1-8.el9.x86_64.rpm
• krb5-pkinit-debuginfo-1.20.1-8.el9.ppc64le.rpm
• krb5-debuginfo-1.20.1-8.el9.x86_64.rpm
• libkadm5-debuginfo-1.20.1-8.el9.i686.rpm
• krb5-pkinit-1.20.1-8.el9.s390x.rpm
• krb5-devel-1.20.1-8.el9.i686.rpm
• krb5-debugsource-1.20.1-8.el9.ppc64le.rpm
• krb5-libs-1.20.1-8.el9.i686.rpm
• krb5-server-1.20.1-8.el9.x86_64.rpm
• libkadm5-1.20.1-8.el9.ppc64le.rpm
• krb5-pkinit-debuginfo-1.20.1-8.el9.s390x.rpm
• krb5-workstation-1.20.1-8.el9.s390x.rpm
• krb5-workstation-1.20.1-8.el9.x86_64.rpm
• krb5-libs-debuginfo-1.20.1-8.el9.i686.rpm
• krb5-devel-1.20.1-8.el9.aarch64.rpm
• krb5-debugsource-1.20.1-8.el9.i686.rpm
• krb5-server-ldap-1.20.1-8.el9.i686.rpm
• krb5-debugsource-1.20.1-8.el9.aarch64.rpm
• krb5-libs-1.20.1-8.el9.aarch64.rpm
• krb5-server-1.20.1-8.el9.aarch64.rpm
• krb5-workstation-debuginfo-1.20.1-8.el9.aarch64.rpm
• krb5-pkinit-1.20.1-8.el9.aarch64.rpm
• krb5-workstation-1.20.1-8.el9.aarch64.rpm
• krb5-server-ldap-1.20.1-8.el9.aarch64.rpm
• krb5-server-ldap-1.20.1-8.el9.s390x.rpm
• krb5-pkinit-debuginfo-1.20.1-8.el9.aarch64.rpm
• krb5-server-ldap-1.20.1-8.el9.x86_64.rpm
• krb5-libs-debuginfo-1.20.1-8.el9.x86_64.rpm
• krb5-pkinit-1.20.1-8.el9.i686.rpm
• krb5-server-1.20.1-8.el9.ppc64le.rpm
• krb5-libs-debuginfo-1.20.1-8.el9.ppc64le.rpm
• krb5-libs-1.20.1-8.el9.ppc64le.rpm
• krb5-server-ldap-debuginfo-1.20.1-8.el9.ppc64le.rpm
• krb5-server-ldap-debuginfo-1.20.1-8.el9.i686.rpm
• libkadm5-1.20.1-8.el9.i686.rpm
• krb5-devel-1.20.1-8.el9.ppc64le.rpm
• krb5-workstation-debuginfo-1.20.1-8.el9.s390x.rpm
• krb5-debuginfo-1.20.1-8.el9.i686.rpm
• krb5-debuginfo-1.20.1-8.el9.ppc64le.rpm
• krb5-libs-debuginfo-1.20.1-8.el9.s390x.rpm
• krb5-debugsource-1.20.1-8.el9.x86_64.rpm
• krb5-libs-debuginfo-1.20.1-8.el9.aarch64.rpm
• krb5-debugsource-1.20.1-8.el9.s390x.rpm
• krb5-server-debuginfo-1.20.1-8.el9.s390x.rpm
• libkadm5-1.20.1-8.el9.aarch64.rpm
• libkadm5-debuginfo-1.20.1-8.el9.aarch64.rpm
• libkadm5-debuginfo-1.20.1-8.el9.s390x.rpm
• krb5-devel-1.20.1-8.el9.s390x.rpm
• libkadm5-1.20.1-8.el9.x86_64.rpm
• krb5-1.20.1-8.el9.src.rpm
• krb5-workstation-debuginfo-1.20.1-8.el9.x86_64.rpm
• libkadm5-debuginfo-1.20.1-8.el9.ppc64le.rpm
• libkadm5-debuginfo-1.20.1-8.el9.x86_64.rpm
• krb5-server-ldap-debuginfo-1.20.1-8.el9.x86_64.rpm
• krb5-workstation-debuginfo-1.20.1-8.el9.ppc64le.rpm
• krb5-server-debuginfo-1.20.1-8.el9.x86_64.rpm
• krb5-pkinit-debuginfo-1.20.1-8.el9.x86_64.rpm
• krb5-libs-1.20.1-8.el9.s390x.rpm
• krb5-server-ldap-debuginfo-1.20.1-8.el9.s390x.rpm
• libkadm5-1.20.1-8.el9.s390x.rpm
• krb5-server-debuginfo-1.20.1-8.el9.ppc64le.rpm
• krb5-workstation-1.20.1-8.el9.ppc64le.rpm
• krb5-server-ldap-1.20.1-8.el9.ppc64le.rpm
• krb5-pkinit-1.20.1-8.el9.ppc64le.rpm
• krb5-debuginfo-1.20.1-8.el9.aarch64.rpm
• krb5-server-1.20.1-8.el9.s390x.rpm
• krb5-server-1.20.1-8.el9.i686.rpm
• krb5-debuginfo-1.20.1-8.el9.s390x.rpm
• krb5-pkinit-debuginfo-1.20.1-8.el9.i686.rpm
• krb5-pkinit-1.20.1-8.el9.x86_64.rpm
• krb5-server-debuginfo-1.20.1-8.el9.i686.rpm

Fixes

• This content is not included.BZ - 1956994
• This content is not included.BZ - 2016312
• This content is not included.BZ - 2025721
• This content is not included.BZ - 2063838
• This content is not included.BZ - 2068535
• This content is not included.BZ - 2121099
• This content is not included.BZ - 2151513
• This content is not included.BZ - 2159643
• This content is not included.BZ - 2162461
• This content is not included.BZ - 2165827
• This content is not included.BZ - 2166603
• This content is not included.BZ - 2169985

CVEs

• CVE-2020-17049

References

• https://access.redhat.com/security/updates/classification/#moderate
• https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/9/html/9.2_release_notes/index

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.