MIT Kerberos up to 1.13.4/1.14.1 kadmin ldap_principal2.c process_db_args DB null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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4.9$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in MIT Kerberos up to 1.13.4/1.14.1. Impacted is the function process_db_args in the library plugins/kdb/ldap/libkdb_ldap/ldap_principal2.c of the component kadmin. Performing a manipulation of the argument DB results in null pointer dereference. This vulnerability is reported as CVE-2016-3119. The attack is possible to be carried out remotely. No exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in MIT Kerberos up to 1.13.4/1.14.1 (Network Authentication Software). It has been classified as problematic. This affects the function process_db_args in the library plugins/kdb/ldap/libkdb_ldap/ldap_principal2.c of the component kadmin. The manipulation of the argument DB 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 summary by CVE is:

The process_db_args function in plugins/kdb/ldap/libkdb_ldap/ldap_principal2.c in the LDAP KDB module in kadmind in MIT Kerberos 5 (aka krb5) through 1.13.4 and 1.14.x through 1.14.1 mishandles the DB argument, which allows remote authenticated users to cause a denial of service (NULL pointer dereference and daemon crash) via a crafted request to modify a principal.

The weakness was disclosed 03/26/2016 by Andrej Nemec as Bug 1319616 as confirmed bug report (Bugzilla). The advisory is shared at bugzilla.redhat.com. This vulnerability is uniquely identified as CVE-2016-3119 since 03/11/2016. It is possible to initiate the attack remotely. The successful exploitation needs a authentication. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 97023 (Amazon Linux AMI : krb5 (ALAS-2017-793)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Amazon Linux Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 157284 (Oracle Enterprise Linux Security Update for krb5 (ELSA-2016-2591)).

Upgrading eliminates this vulnerability. A possible mitigation has been published 12 months after the disclosure of the vulnerability. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 24268.

The vulnerability is also documented in the databases at X-Force (111772), Tenable (97023), SecurityFocus (BID 85392†) and Vulnerability Center (SBV-57778†). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 4.9

VulDB Base Score: 5.3
VulDB Temp Score: 4.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.3
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

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

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Unproven

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 97023
Nessus Name: Amazon Linux AMI : krb5 (ALAS-2017-793)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 867773
OpenVAS Name: Fedora Update for krb5 FEDORA-2016-8
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
Exposure Time: 🔍

Patch: github.com
TippingPoint: 🔍

McAfee IPS: 🔍
McAfee IPS Version: 🔍

Fortigate IPS: 🔍

Timelineinfo

03/11/2016 🔍
03/14/2016 +3 days 🔍
03/24/2016 +10 days 🔍
03/25/2016 +0 days 🔍
03/26/2016 +1 days 🔍
03/27/2016 +1 days 🔍
03/29/2016 +2 days 🔍
02/06/2017 +314 days 🔍
02/07/2017 +1 days 🔍
07/11/2022 +1980 days 🔍

Sourcesinfo

Vendor: mit.edu

Advisory: Bug 1319616
Researcher: Andrej Nemec
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-3119 (🔍)
GCVE (CVE): GCVE-0-2016-3119
GCVE (VulDB): GCVE-100-81537
X-Force: 111772 - MIT Kerberos process_db_args() denial of service
SecurityFocus: 85392 - MIT Kerberos 5 CVE-2016-3119 NULL Pointer Dereference Remote Denial of Service Vulnerability
SecurityTracker: 1035399
Vulnerability Center: 57778 - MIT Kerberos 5 Remote DoS via a Crafted Request to Modify a Principal, Low

Entryinfo

Created: 03/27/2016 19:14
Updated: 07/11/2022 15:12
Changes: 03/27/2016 19:14 (78), 02/03/2019 10:13 (19), 07/11/2022 15:12 (4)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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