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Vigil@nce - MIT krb5: denial of service via KDC TGT Only

September 2016 by Vigil@nce

This bulletin was written by Vigil@nce : https://vigilance.fr/offer

SYNTHESIS OF THE VULNERABILITY

An attacker can send a malicious query to MIT krb5, in order to
trigger a KDC denial of service.

Impacted products: Fedora, MIT krb5, openSUSE Leap.

Severity: 2/4.

Creation date: 22/07/2016.

DESCRIPTION OF THE VULNERABILITY

The MIT krb5 product can be configured so anonymous client
principals are restricted to obtaining TGT only.

However, in this case, a client can stop the KDC.

An attacker can therefore send a malicious query to MIT krb5, in
order to trigger a KDC denial of service.

ACCESS TO THE COMPLETE VIGIL@NCE BULLETIN

https://vigilance.fr/vulnerability/MIT-krb5-denial-of-service-via-KDC-TGT-Only-20194


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