CVE-2016-3120

Medium

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.

SeverityMedium

CVSS6.5

Exploit probability—

ProductMit Kerberos

PublishedAug 1, 2016

First seenAug 1, 2016

How to fix

Vendor advisories

lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AWL3KYFRJIX37EAM4DKCQQIQP2WBKL35/

Affected products

Product	Affected versions	Fixed in
mit kerberos_5	1.13, 1.13.1, 1.13.2, 1.13.3, 1.13.4, 1.13.5, 1.13.6, 1.14, 1.14.1, 1.14.2	—

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