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

A vulnerability in MIT Kerberos 5 could lead to a Denial of Service condition.

Package	app-crypt/mit-krb5 on all architectures
Affected versions	< 1.18.2-r2
Unaffected versions	>= 1.18.2-r2

The MIT Kerberos 5 implementation provides a command line telnet client which is used for remote login via the telnet protocol.

It was discovered that MIT Kerberos network authentication system, krb5, did not properly handle ASN.1-encoded Kerberos messages.

A remote attacker could send a specially crafted Kerberos message, possibly resulting in a Denial of Service condition.

There is no known workaround at this time.

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"

Release date
November 16, 2020

Latest revision
November 16, 2020: 1

Severity
low

Exploitable
remote

Bugzilla entries