CVE-2016-3120

MEDIUM

MIT Kerberos 5 < 1.13.6 and 1.14.x < 1.14.3 - Authenticated Denial of Service via S4U2Self Request

Title source: llm
STIX 2.1

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.

References (10)

Core 10
Core References
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/92132
Mailing List mailing-list x_refsource_mlist
https://lists.debian.org/debian-lts-announce/2018/01/msg00040.html
Mailing List vendor-advisory x_refsource_suse
http://lists.opensuse.org/opensuse-updates/2016-09/msg00035.html
Issue Tracking x_refsource_confirm
http://krbdev.mit.edu/rt/Ticket/Display.html?id=8458
Third Party Advisory, VDB Entry vdb-entry x_refsource_sectrack
http://www.securitytracker.com/id/1036442
Various Sources x_refsource_confirm
http://web.mit.edu/kerberos/krb5-1.13/
Vendor Advisory vendor-advisory x_refsource_redhat
http://rhn.redhat.com/errata/RHSA-2016-2591.html
Various Sources x_refsource_confirm
http://web.mit.edu/kerberos/krb5-1.14/

Scores

CVSS v3 6.5
EPSS 0.0326
EPSS Percentile 87.3%
Attack Vector NETWORK
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Details

CWE
CWE-476
Status published
Products (10)
mit/kerberos_5 1.13
mit/kerberos_5 1.13.1
mit/kerberos_5 1.13.2
mit/kerberos_5 1.13.3
mit/kerberos_5 1.13.4
mit/kerberos_5 1.13.5
mit/kerberos_5 1.13.6
mit/kerberos_5 1.14
mit/kerberos_5 1.14.1
mit/kerberos_5 1.14.2
Published Aug 01, 2016
Tracked Since Feb 18, 2026