MIT Kerberos up to 5-1.10.1 svr_principal.c check_1_6_dummy null pointer dereference
CVSS Meta Temp Score | Current Exploit Price (≈) | CTI Interest Score |
---|---|---|
3.8 | $0-$5k | 0.00 |
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) and Tenable (68589). Similar entry is available at 5901.
Product
Type
Vendor
Name
Version
License
CPE 2.3
CPE 2.2
CVSSv4
VulDB CVSS-B Score: 🔍VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍
CVSSv3
VulDB Meta Base Score: 4.3VulDB Meta Temp Score: 3.8
VulDB Base Score: 4.3
VulDB Temp Score: 3.8
VulDB Vector: 🔍
VulDB Reliability: 🔍
CVSSv2
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VulDB Base Score: 🔍
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VulDB Reliability: 🔍
NVD Base Score: 🔍
Exploiting
Class: Null pointer dereferenceCWE: CWE-476 / CWE-404
ATT&CK: Unknown
Local: No
Remote: Yes
Availability: 🔍
Status: Not defined
EPSS Score: 🔍
EPSS Percentile: 🔍
Price Prediction: 🔍
Current Price Estimation: 🔍
0-Day | unlock | unlock | unlock | unlock |
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Today | unlock | unlock | unlock | unlock |
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 Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: UpgradeStatus: 🔍
0-Day Time: 🔍
Upgrade: Kerberos 5-1.8
Patch: github.com
Timeline
02/07/2012 🔍06/05/2012 🔍
06/07/2012 🔍
06/07/2012 🔍
06/07/2012 🔍
07/12/2013 🔍
01/27/2015 🔍
03/23/2015 🔍
12/03/2021 🔍
Sources
Vendor: mit.eduAdvisory: RHSA-2012:1131
Status: Not defined
Confirmation: 🔍
CVE: CVE-2012-1013 (🔍)
OVAL: 🔍
X-Force: 76058
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
SecurityFocus: 53784 - MIT Kerberos 5 'check_1_6_dummy()' Function NULL Pointer Dereference Denial Of Service Vulnerability
See also: 🔍
Entry
Created: 03/23/2015 16:50Updated: 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: 🔍
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