MIT Kerberos up to 1.10.3 Key Distribution Center pkinit_srv.c pkinit_server_return_padata null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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7.2$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, was found in MIT Kerberos up to 1.10.3. This affects the function pkinit_server_return_padata of the file plugins/preauth/pkinit/pkinit_srv.c of the component Key Distribution Center. The manipulation results in null pointer dereference. This vulnerability is cataloged as CVE-2012-1016. There is no exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability classified as critical has been found in MIT Kerberos up to 1.10.3 (Network Authentication Software). Affected is the function pkinit_server_return_padata of the file plugins/preauth/pkinit/pkinit_srv.c of the component Key Distribution Center. 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. CVE summarizes:

The pkinit_server_return_padata function in plugins/preauth/pkinit/pkinit_srv.c in the PKINIT implementation in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) before 1.10.4 attempts to find an agility KDF identifier in inappropriate circumstances, which allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via a crafted Draft 9 request.

The weakness was shared 01/02/2013 as confirmed changelog entry (Website). The advisory is shared for download at web.mit.edu. The vendor cooperated in the coordination of the public release. This vulnerability is traded as CVE-2012-1016 since 02/07/2012. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 68792 (Oracle Linux 6 : krb5 (ELSA-2013-0656)), 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 195579 (Ubuntu Security Notification for Krb5 Vulnerabilities (USN-2310-1)).

Upgrading to version 1.10.4 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at X-Force (82536), Tenable (68792), SecurityFocus (BID 58144†), OSVDB (90895†) and Secunia (SA52680†). The entries VDB-7828, VDB-8455, VDB-67256 and VDB-64211 are related to this item. Once again VulDB remains the best source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.2

VulDB Base Score: 7.5
VulDB Temp Score: 7.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

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: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 68792
Nessus Name: Oracle Linux 6 : krb5 (ELSA-2013-0656)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 881692
OpenVAS Name: CentOS Update for krb5-devel CESA-2013:0656 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 1.10.4
Patch: github.com

Timelineinfo

02/07/2012 🔍
01/02/2013 +330 days 🔍
01/02/2013 +0 days 🔍
02/22/2013 +51 days 🔍
03/04/2013 +10 days 🔍
03/08/2013 +4 days 🔍
03/18/2013 +10 days 🔍
03/20/2013 +2 days 🔍
03/24/2013 +4 days 🔍
07/12/2013 +110 days 🔍
05/05/2021 +2854 days 🔍

Sourcesinfo

Vendor: mit.edu

Advisory: web.mit.edu
Status: Confirmed
Confirmation: 🔍
Coordinated: 🔍

CVE: CVE-2012-1016 (🔍)
GCVE (CVE): GCVE-0-2012-1016
GCVE (VulDB): GCVE-100-7884

OVAL: 🔍

X-Force: 82536
SecurityFocus: 58144 - MIT Kerberos 5 CVE-2013-1415 NULL Pointer Dereference Denial of Service Vulnerability
Secunia: 52680 - SUSE update for krb5, Less Critical
OSVDB: 90895
SecurityTracker: 1028307 - Kerberos Null Pointer Dereference in KDC PKINIT Code Lets Remote Users Deny Service
Vulnerability Center: 38888 - MIT Kerberos 5 <1.10.4 KDC Allows Remote Null Pointer Dereference via a Crafted Draft 9 Request, Medium

See also: 🔍

Entryinfo

Created: 03/08/2013 10:08
Updated: 05/05/2021 18:36
Changes: 03/08/2013 10:08 (88), 04/26/2017 17:43 (2), 05/05/2021 18:36 (3)
Complete: 🔍
Committer:
Cache ID: 216:E50:103

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