Alpine Linux: CVE-2016-3120: krb5 S4U2Self KDC crash when anon is restricted
4
(AV:N/AC:L/Au:S/C:N/I:N/A:P)
07/31/2016
07/25/2018
08/30/2017
01/08/2018
Description
The validate_as_request function in kdc_util.c in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) before 1.13.6 and 1.4.x before 1.14.3, when restrict_anonymous_to_tgt is enabled, uses an incorrect client data structure, which allows remote authenticated users to cause a denial of service (NULL pointer dereference and daemon crash) via an S4U2Self request.
Solution(s)
- alpine-linux-upgrade-krb5
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