CVE-2016-3120

medium
New! CVE Severity Now Using CVSS v3

The calculated severity for CVEs has been updated to use CVSS v3 by default. CVEs that do not have a CVSS v3 score will fall back CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

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

http://krbdev.mit.edu/rt/Ticket/Display.html?id=8458

http://lists.opensuse.org/opensuse-updates/2016-09/msg00035.html

http://rhn.redhat.com/errata/RHSA-2016-2591.html

http://web.mit.edu/kerberos/krb5-1.13/

http://web.mit.edu/kerberos/krb5-1.14/

http://www.securityfocus.com/bid/92132

http://www.securitytracker.com/id/1036442

https://github.com/krb5/krb5/commit/93b4a6306a0026cf1cc31ac4bd8a49ba5d034ba7

https://lists.debian.org/debian-lts-announce/2018/01/msg00040.html

https://lists.fedoraproject.org/archives/list/[email protected]/message/AWL3KYFRJIX37EAM4DKCQQIQP2WBKL35/

Details

Source: MITRE

Published: 2016-08-01

Updated: 2020-01-21

Type: CWE-476

Risk Information

CVSS v2

Base Score: 4

Vector: AV:N/AC:L/Au:S/C:N/I:N/A:P

Impact Score: 2.9

Exploitability Score: 8

Severity: MEDIUM

CVSS v3

Base Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Impact Score: 3.6

Exploitability Score: 2.8

Severity: MEDIUM

Tenable Plugins

View all (15 total)

IDNameProductFamilySeverity
121701Photon OS 1.0: Krb5 PHSA-2017-0021NessusPhotonOS Local Security Checks
high
111870Photon OS 1.0: Bindutils / Krb5 / Ruby / Sudo / Zlib PHSA-2017-0021 (deprecated)NessusPhotonOS Local Security Checks
high
106536Debian DLA-1265-1 : krb5 security updateNessusDebian Local Security Checks
medium
99836EulerOS 2.0 SP1 : krb5 (EulerOS-SA-2016-1076)NessusHuawei Local Security Checks
medium
97023Amazon Linux AMI : krb5 (ALAS-2017-793)NessusAmazon Linux Local Security Checks
medium
95842Scientific Linux Security Update : krb5 on SL7.x x86_64 (20161103)NessusScientific Linux Local Security Checks
medium
95337CentOS 7 : krb5 (CESA-2016:2591)NessusCentOS Local Security Checks
medium
94712Oracle Linux 7 : krb5 (ELSA-2016-2591)NessusOracle Linux Local Security Checks
medium
94554RHEL 7 : krb5 (RHSA-2016:2591)NessusRed Hat Local Security Checks
medium
93393openSUSE Security Update : krb5 (openSUSE-2016-1065)NessusSuSE Local Security Checks
medium
93303SUSE SLED12 / SLES12 Security Update : krb5 (SUSE-SU-2016:2136-1)NessusSuSE Local Security Checks
medium
93266Fedora 23 : krb5 (2016-f405b25923)NessusFedora Local Security Checks
medium
93262Fedora 23 : krb5 (2016-4a36663643)NessusFedora Local Security Checks
medium
92668Fedora 24 : krb5 (2016-0674a3c372)NessusFedora Local Security Checks
medium
92503FreeBSD : krb5 -- KDC denial of service vulnerability (62d45229-4fa0-11e6-9d13-206a8a720317)NessusFreeBSD Local Security Checks
medium