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Gentoo Linux Security Advisory GLSA 202011-17
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https://security.gentoo.org/
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Severity: Low
Title: MIT Kerberos 5: Denial of service
Date: November 16, 2020
Bugs: #753281
ID: 202011-17
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Synopsis
========
A vulnerability in MIT Kerberos 5 could lead to a Denial of Service
condition.
Background
==========
The MIT Kerberos 5 implementation provides a command line telnet client
which is used for remote login via the telnet protocol.
Affected packages
=================
——————————————————————-
Package / Vulnerable / Unaffected
——————————————————————-
1 app-crypt/mit-krb5 < 1.18.2-r2 >= 1.18.2-r2
Description
===========
It was discovered that MIT Kerberos network authentication system,
krb5, did not properly handle ASN.1-encoded Kerberos messages.
Impact
======
A remote attacker could send a specially crafted Kerberos message,
possibly resulting in a Denial of Service condition.
Workaround
==========
There is no known workaround at this time.
Resolution
==========
All MIT Kerberos 5 users should upgrade to the latest version:
# emerge –sync
# emerge –ask –oneshot –verbose “>=app-crypt/mit-krb5-1.18.2-r2”
References
==========
[ 1 ] CVE-2020-28196
https://nvd.nist.gov/vuln/detail/CVE-2020-28196
Availability
============
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
https://security.gentoo.org/glsa/202011-17
Concerns?
=========
Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users’ machines is of utmost
importance to us. Any security concerns should be addressed to
security@gentoo.org or alternatively, you may file a bug at
https://bugs.gentoo.org.
License
=======
Copyright 2020 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).
The contents of this document are licensed under the
Creative Commons – Attribution / Share Alike license.
https://creativecommons.org/licenses/by-sa/2.5
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