RHSA-2021:1593: Moderate: krb5 security update
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: unbounded recursion via an ASN.1-encoded Kerberos message in lib/krb5/asn.1/asn1encode.c may lead to DoS (CVE-2020-28196) 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 8.4 Release Notes linked from the References section.
Affected Software
Remediation
Event History
Frequently Asked Questions
What is the severity of RHSA-2021:1593?
The severity of RHSA-2021:1593 is classified as critical.
What vulnerability does RHSA-2021:1593 address?
RHSA-2021:1593 addresses vulnerabilities in the Kerberos authentication system.
How do I fix RHSA-2021:1593?
To fix RHSA-2021:1593, update the affected packages to version 1.18.2-8.el8 or later.
Which packages are affected by RHSA-2021:1593?
Affected packages include krb5, krb5-debuginfo, krb5-libs, and others specified in the advisory.
Is there a workaround for RHSA-2021:1593?
There are no official workarounds for RHSA-2021:1593; the recommended solution is to apply the necessary updates.