1. Home
  2. Vulnerabilities
  3. CVE-2016-3120
6.5
MEDIUM CVSS 3.0
CVE-2016-3120
Kerberos 5 KDC Krbyss Use-After-Free Remote DoS
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.

INFO

Published Date :

Aug. 1, 2016, 2:59 a.m.

Last Modified :

April 12, 2025, 10:46 a.m.

Remotely Exploit :

Yes !

Source :

[email protected]
Affected Products

The following products are affected by CVE-2016-3120 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Mit kerberos_5
2 Mit kerberos
: Total Affected Vendor : 1 | Products : 2
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 2.0 MEDIUM [email protected]
CVSS 3.0 MEDIUM [email protected]
Solution
To address the Kerberos 5 KDC vulnerability, update the affected packages.
  • Update Kerberos 5 packages to a non-vulnerable version.
  • Apply available patches for your specific Linux distribution.
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2016-3120.

URL Resource
http://krbdev.mit.edu/rt/Ticket/Display.html?id=8458 Issue Tracking
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/package-announce%40lists.fedoraproject.org/message/AWL3KYFRJIX37EAM4DKCQQIQP2WBKL35/
http://krbdev.mit.edu/rt/Ticket/Display.html?id=8458 Issue Tracking
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/package-announce%40lists.fedoraproject.org/message/AWL3KYFRJIX37EAM4DKCQQIQP2WBKL35/
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2016-3120 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2016-3120 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2016-3120 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2016-3120 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Nov. 21, 2024

    Action Type Old Value New Value
    Added Reference http://krbdev.mit.edu/rt/Ticket/Display.html?id=8458
    Added Reference http://lists.opensuse.org/opensuse-updates/2016-09/msg00035.html
    Added Reference http://rhn.redhat.com/errata/RHSA-2016-2591.html
    Added Reference http://web.mit.edu/kerberos/krb5-1.13/
    Added Reference http://web.mit.edu/kerberos/krb5-1.14/
    Added Reference http://www.securityfocus.com/bid/92132
    Added Reference http://www.securitytracker.com/id/1036442
    Added Reference https://github.com/krb5/krb5/commit/93b4a6306a0026cf1cc31ac4bd8a49ba5d034ba7
    Added Reference https://lists.debian.org/debian-lts-announce/2018/01/msg00040.html
    Added Reference https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AWL3KYFRJIX37EAM4DKCQQIQP2WBKL35/
  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • CVE Modified by [email protected]

    Nov. 07, 2023

    Action Type Old Value New Value
    Added Reference MITRE https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AWL3KYFRJIX37EAM4DKCQQIQP2WBKL35/ [No types assigned]
    Removed Reference MITRE https://lists.fedoraproject.org/archives/list/[email protected]/message/AWL3KYFRJIX37EAM4DKCQQIQP2WBKL35/
  • CPE Deprecation Remap by [email protected]

    Jan. 21, 2020

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:a:mit:kerberos:5-1.14.2:*:*:*:*:*:*:* OR *cpe:2.3:a:mit:kerberos_5:1.14.2:*:*:*:*:*:*:*
  • CPE Deprecation Remap by [email protected]

    Jan. 21, 2020

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:a:mit:kerberos:5-1.14.1:*:*:*:*:*:*:* OR *cpe:2.3:a:mit:kerberos_5:1.14.1:*:*:*:*:*:*:*
  • CPE Deprecation Remap by [email protected]

    Jan. 21, 2020

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:a:mit:kerberos:5-1.14:*:*:*:*:*:*:* OR *cpe:2.3:a:mit:kerberos_5:1.14:*:*:*:*:*:*:*
  • CPE Deprecation Remap by [email protected]

    Jan. 21, 2020

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:a:mit:kerberos:5-1.13.6:*:*:*:*:*:*:* OR *cpe:2.3:a:mit:kerberos_5:1.13.6:*:*:*:*:*:*:*
  • CPE Deprecation Remap by [email protected]

    Jan. 21, 2020

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:a:mit:kerberos:5-1.13.5:*:*:*:*:*:*:* OR *cpe:2.3:a:mit:kerberos_5:1.13.5:*:*:*:*:*:*:*
  • CPE Deprecation Remap by [email protected]

    Jan. 21, 2020

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:a:mit:kerberos:5-1.13.4:*:*:*:*:*:*:* OR *cpe:2.3:a:mit:kerberos_5:1.13.4:*:*:*:*:*:*:*
  • CPE Deprecation Remap by [email protected]

    Jan. 21, 2020

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:a:mit:kerberos:5-1.13.3:*:*:*:*:*:*:* OR *cpe:2.3:a:mit:kerberos_5:1.13.3:*:*:*:*:*:*:*
  • CPE Deprecation Remap by [email protected]

    Jan. 21, 2020

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:a:mit:kerberos:5-1.13.2:*:*:*:*:*:*:* OR *cpe:2.3:a:mit:kerberos_5:1.13.2:*:*:*:*:*:*:*
  • CPE Deprecation Remap by [email protected]

    Jan. 21, 2020

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:a:mit:kerberos:5-1.13.1:*:*:*:*:*:*:* OR *cpe:2.3:a:mit:kerberos_5:1.13.1:*:*:*:*:*:*:*
  • CPE Deprecation Remap by [email protected]

    Jan. 21, 2020

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:a:mit:kerberos:5-1.13:*:*:*:*:*:*:* OR *cpe:2.3:a:mit:kerberos_5:1.13:*:*:*:*:*:*:*
  • CVE Modified by [email protected]

    Feb. 04, 2018

    Action Type Old Value New Value
    Added Reference https://lists.debian.org/debian-lts-announce/2018/01/msg00040.html [No Types Assigned]
  • CVE Modified by [email protected]

    Jan. 05, 2018

    Action Type Old Value New Value
    Added Reference http://rhn.redhat.com/errata/RHSA-2016-2591.html [No Types Assigned]
  • CVE Modified by [email protected]

    Sep. 01, 2017

    Action Type Old Value New Value
    Added Reference http://www.securitytracker.com/id/1036442 [No Types Assigned]
  • CVE Modified by [email protected]

    Nov. 28, 2016

    Action Type Old Value New Value
    Added Reference http://lists.opensuse.org/opensuse-updates/2016-09/msg00035.html [No Types Assigned]
    Added Reference http://www.securityfocus.com/bid/92132 [No Types Assigned]
    Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/AWL3KYFRJIX37EAM4DKCQQIQP2WBKL35/ [No Types Assigned]
  • Modified Analysis by [email protected]

    Aug. 01, 2016

    Action Type Old Value New Value
    Added CPE Configuration Configuration 1 OR *cpe:2.3:a:mit:kerberos:5-1.14:*:*:*:*:*:*:* *cpe:2.3:a:mit:kerberos:5-1.14.1:*:*:*:*:*:*:* *cpe:2.3:a:mit:kerberos:5-1.14.2:*:*:*:*:*:*:* *cpe:2.3:a:mit:kerberos:5-1.13.4:*:*:*:*:*:*:* *cpe:2.3:a:mit:kerberos:5-1.13.5:*:*:*:*:*:*:* *cpe:2.3:a:mit:kerberos:5-1.13.6:*:*:*:*:*:*:* *cpe:2.3:a:mit:kerberos:5-1.13.3:*:*:*:*:*:*:* *cpe:2.3:a:mit:kerberos:5-1.13.2:*:*:*:*:*:*:* *cpe:2.3:a:mit:kerberos:5-1.13.1:*:*:*:*:*:*:* *cpe:2.3:a:mit:kerberos:5-1.13:*:*:*:*:*:*:*
    Added CVSS V2 (AV:N/AC:L/Au:S/C:N/I:N/A:P)
    Added CVSS V3 AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
    Changed Reference Type http://krbdev.mit.edu/rt/Ticket/Display.html?id=8458 No Types Assigned http://krbdev.mit.edu/rt/Ticket/Display.html?id=8458 Issue Tracking
    Added CWE CWE-476
  • Initial Analysis by [email protected]

    Aug. 01, 2016

    Action Type Old Value New Value
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
Vulnerability Scoring Details
Base CVSS Score: 6.5
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact
Base CVSS Score: 4
Access Vector
Access Complexity
Authentication
Confidentiality Impact
Integrity Impact
Availability Impact
Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

1.89 }} 0.73%

score

0.82328

percentile