VDB-90366 · CVE-2016-3120 · BID 92132

MIT Kerberos 5 up to 1.14.2 KDC Service validate_as_request null pointer dereference

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.3	$0-$5k	0.00

A vulnerability was found in MIT Kerberos 5 up to 1.14.2 (Network Authentication Software). It has been classified as critical. Affected is the function validate_as_request of the component KDC Service. The manipulation with an unknown input leads to a null pointer dereference vulnerability. CWE is classifying the issue as CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. This is going to have an impact on availability.

The weakness was released 07/20/2016 as Kerberos 5 Release 1.14.3 as confirmed release notes (Website). The advisory is available at web.mit.edu. This vulnerability is traded as CVE-2016-3120 since 03/11/2016. The exploitability is told to be easy. It is possible to launch the attack remotely. A authentication is necessary for exploitation. Technical details are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 93262 (Fedora 23 : krb5 (2016-4a36663643)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 236161 (Red Hat Update for krb5 security (RHSA-2016:2591)).

Upgrading to version 1.14.3 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (93262). Entries connected to this vulnerability are available at VDB-114127, VDB-164447, VDB-179454 and VDB-181283.

Productinfo

Type

Network Authentication Software

Vendor

Name

Kerberos 5

Version

License

open-source

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.3

VulDB Base Score: 6.5
VulDB Temp Score: 6.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.5
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	unlock	unlock	unlock	unlock
Today	unlock	unlock	unlock	unlock

Nessus ID: 93262
Nessus Name: Fedora 23 : krb5 (2016-4a36663643)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 867699
OpenVAS Name: Fedora Update for krb5 FEDORA-2016-4a36663643
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: Kerberos 5 1.14.3
Patch: github.com

Timelineinfo

03/11/2016 🔍
07/20/2016 +131 days 🔍
07/20/2016 +0 days 🔍
07/26/2016 +6 days 🔍
07/26/2016 +0 days 🔍
07/26/2016 +0 days 🔍
07/31/2016 +5 days 🔍
09/02/2016 +33 days 🔍
09/09/2022 +2198 days 🔍

Sourcesinfo

Vendor: mit.edu

Advisory: Kerberos 5 Release 1.14.3
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-3120 (🔍)
SecurityTracker: 1036442
SecurityFocus: 92132 - MIT Kerberos KDC CVE-2016-3120 NULL Pointer Dereference Denial Of Service Vulnerability

See also: 🔍

Entryinfo

Created: 07/26/2016 16:59
Updated: 09/09/2022 14:28
Changes: 07/26/2016 16:59 (71), 03/10/2019 13:50 (12), 09/09/2022 14:28 (4)
Complete: 🔍
Cache ID: 3:DFB:103