MIT Kerberos up to 5-1.10.1 svr_principal.c check_1_6_dummy null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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3.8$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in MIT Kerberos up to 5-1.10.1. This affects the function check_1_6_dummy in the library lib/kadm5/srv/svr_principal.c of the component Kerberos. Performing a manipulation results in null pointer dereference. This vulnerability is known as CVE-2012-1013. Remote exploitation of the attack is possible. No exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, was found in MIT Kerberos up to 5-1.10.1 (Network Authentication Software). This affects the function check_1_6_dummy in the library lib/kadm5/srv/svr_principal.c of the component Kerberos. 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 summary by CVE is:

The check_1_6_dummy function in lib/kadm5/srv/svr_principal.c in kadmind in MIT Kerberos 5 (aka krb5) 1.8.x, 1.9.x, and 1.10.x before 1.10.2 allows remote authenticated administrators to cause a denial of service (NULL pointer dereference and daemon crash) via a KRB5_KDB_DISALLOW_ALL_TIX create request that lacks a password.

The weakness was published 06/07/2012 (GitHub Repository). It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2012-1013 since 02/07/2012. The exploitability is told to be easy. It is possible to initiate the attack remotely. The successful exploitation needs a authentication. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 68589 (Oracle Linux 6 : krb5 (ELSA-2012-1131)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Oracle Linux Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 350633 (Amazon Linux Security Advisory for krb5: ALAS-2012-114).

Upgrading to version 5-1.8 eliminates this vulnerability.

The vulnerability is also documented in the databases at X-Force (76058), Tenable (68589), SecurityFocus (BID 53784†) and Vulnerability Center (SBV-48234†). Similar entry is available at VDB-5901. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 3.8

VulDB Base Score: 4.3
VulDB Temp Score: 3.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

Exploitinginfo

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

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 68589
Nessus Name: Oracle Linux 6 : krb5 (ELSA-2012-1131)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 881460
OpenVAS Name: CentOS Update for krb5-devel CESA-2012:1131 centos6
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kerberos 5-1.8
Patch: github.com

Timelineinfo

02/07/2012 🔍
06/05/2012 +119 days 🔍
06/07/2012 +2 days 🔍
06/07/2012 +0 days 🔍
06/07/2012 +0 days 🔍
07/12/2013 +400 days 🔍
01/27/2015 +564 days 🔍
03/23/2015 +55 days 🔍
12/03/2021 +2447 days 🔍

Sourcesinfo

Vendor: mit.edu

Advisory: RHSA-2012:1131
Status: Not defined
Confirmation: 🔍

CVE: CVE-2012-1013 (🔍)
GCVE (CVE): GCVE-0-2012-1013
GCVE (VulDB): GCVE-100-60915

OVAL: 🔍

X-Force: 76058
SecurityFocus: 53784 - MIT Kerberos 5 'check_1_6_dummy()' Function NULL Pointer Dereference Denial Of Service Vulnerability
Vulnerability Center: 48234 - MIT Kerberos 5 1.8.x, 1.9.x, and 1.10.x Before 1.10.2 Remote Denial of Service Vulnerability, Medium

See also: 🔍

Entryinfo

Created: 03/23/2015 16:50
Updated: 12/03/2021 14:47
Changes: 03/23/2015 16:50 (71), 07/07/2017 17:06 (6), 12/03/2021 14:38 (3), 12/03/2021 14:43 (1), 12/03/2021 14:47 (2)
Complete: 🔍
Cache ID: 216:485:103

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