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Fedora 34 FEDORA-2021-8b25e4642f Critical KDC Null Dereference

fedora
Calendar Grey July 13, 2021
Dist Fedora Esm H88
The KDC null pointer dereference fix for krb5 in Fedora 34 tackles CVE-2021-36222. Urgent measures must be taken!
- Fix KDC null deref on bad encrypted challenge - CVE-2021-36222 - Denial-of- service only - (f34 only): pull-up to rawhide

Summary

Kerberos V5 is a trusted-third-party network authentication system,

which can improve your network's security by eliminating the insecure

practice of sending passwords over the network in unencrypted form.

- Fix KDC null deref on bad encrypted challenge - CVE-2021-36222 - Denial-of-service only - (f34 only): pull-up to rawhide

* Mon Jul 12 2021 Robbie Harwood - 1.19.1-14

- Fix KDC null deref on bad encrypted challenge (CVE-2021-36222)

* Thu Jul 1 2021 Robbie Harwood - 1.19.1-13

- Fix use-after-free during krad remote_shutdown()

* Mon Jun 28 2021 Robbie Harwood - 1.19.1-12

- MEMORY locking fix and static analysis pullup

* Mon Jun 21 2021 Robbie Harwood - 1.19.1-11

- Add the backward-compatible parts of openssl3 support

* Wed Jun 9 2021 Robbie Harwood - 1.19.1-10

- Fix three canonicalization cases for fallback

* Wed Jun 2 2021 Robbie Harwood - 1.19.1-9

- Fix doc build for Sphinx 4.0

su -c 'dnf upgrade --advisory FEDORA-2021-8b25e4642f' at the command

line. For more information, refer to the dnf documentation available at

https://dnf.readthedocs.io/en/latest/command_ref.html

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Change Log

References

Update Instructions

Severity
critical
Lowest
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Critical

Product: Fedora 34
Version: 1.19.1
Release: 14.fc34
Summary: The Kerberos network authentication system

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