GLSA 202011-17: MIT Kerberos 5: Denial of service

http://security.gentoo.org/

Severity:	low
Title:	MIT Kerberos 5: Denial of service
Date:	11/16/2020
Bugs:	#753281
ID:	202011-17

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	Architecture(s)
app-crypt/mit-krb5	< 1.18.2-r2	>= 1.18.2-r2	All supported architectures

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

CVE-2020-28196

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-202011-17.xml

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.