Microsoft Windows 7/Server 2008 R2 Kerberos denial of service

CVSS Meta Temp Score
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CTI Interest Score
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6.7$0-$5k0.00

Summaryinfo

A vulnerability was found in Microsoft Windows 7/Server 2008 R2. It has been classified as problematic. Impacted is an unknown function of the component Kerberos. Performing a manipulation results in denial of service. This vulnerability is reported as CVE-2012-2551. The attack is possible to be carried out remotely. Moreover, an exploit is present. To fix this issue, it is recommended to deploy a patch.

Detailsinfo

A vulnerability, which was classified as critical, was found in Microsoft Windows 7/Server 2008 R2 (Operating System). This affects an unknown code block of the component Kerberos. The manipulation with an unknown input leads to a denial of service vulnerability. CWE is classifying the issue as CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. This is going to have an impact on availability. The summary by CVE is:

The server in Kerberos in Microsoft Windows Server 2008 R2 and R2 SP1, and Windows 7 Gold and SP1, allows remote attackers to cause a denial of service (NULL pointer dereference and reboot) via a crafted session request, aka "Kerberos NULL Dereference Vulnerability."

The weakness was disclosed 10/09/2012 as MS12-069 as confirmed bulletin (Website). It is possible to read the advisory at technet.microsoft.com. The public release has been coordinated in cooperation with Microsoft. This vulnerability is uniquely identified as CVE-2012-2551 since 05/09/2012. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details are unknown but a private exploit is available. The attack technique deployed by this issue is T1499 according to MITRE ATT&CK.

It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 62464 (MS12-069: Vulnerability in Kerberos Could Allow Denial of Service (2743555)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Windows : Microsoft Bulletins. The commercial vulnerability scanner Qualys is able to test this issue with plugin 90835 (Microsoft Windows Kerberos Denial of Service Vulnerability (MS12-069)).

Applying the patch MS12-069 is able to eliminate this problem. The bugfix is ready for download at technet.microsoft.com. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (62464), SecurityFocus (BID 55778†), OSVDB (86060†), Secunia (SA50867†) and SecurityTracker (ID 1027620†). Further details are available at technet.microsoft.com. The entries VDB-6621, VDB-6622, VDB-6623 and VDB-6624 are pretty similar. 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: 🔍
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CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 6.7

VulDB Base Score: 7.5
VulDB Temp Score: 6.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Denial of service
CWE: CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Private
Status: Proof-of-Concept

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Nessus ID: 62464
Nessus Name: MS12-069: Vulnerability in Kerberos Could Allow Denial of Service (2743555)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 901301
OpenVAS Name: Microsoft Windows Kerberos Denial of Service Vulnerability (2743555)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Patch
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
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Patch: MS12-069
ISS Proventia IPS: 🔍
PaloAlto IPS: 🔍

Timelineinfo

05/09/2012 🔍
10/04/2012 +148 days 🔍
10/09/2012 +5 days 🔍
10/09/2012 +0 days 🔍
10/09/2012 +0 days 🔍
10/09/2012 +0 days 🔍
10/10/2012 +1 days 🔍
10/10/2012 +0 days 🔍
10/10/2012 +0 days 🔍
01/07/2025 +4472 days 🔍

Sourcesinfo

Vendor: microsoft.com
Product: microsoft.com

Advisory: MS12-069
Status: Confirmed
Coordinated: 🔍

CVE: CVE-2012-2551 (🔍)
GCVE (CVE): GCVE-0-2012-2551
GCVE (VulDB): GCVE-100-6627

OVAL: 🔍
IAVM: 🔍

SecurityFocus: 55778
Secunia: 50867 - Microsoft Windows Kerberos Session Handling Denial of Service Vulnerability, Less Critical
OSVDB: 86060
SecurityTracker: 1027620
Vulnerability Center: 36430 - [MS12-069] Microsoft Windows Remote DoS in Kerberos via a Specially Crafted Session Request, High

scip Labs: https://www.scip.ch/en/?labs.20140213
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Entryinfo

Created: 10/10/2012 12:53
Updated: 01/07/2025 23:45
Changes: 10/10/2012 12:53 (52), 05/03/2019 11:12 (29), 04/14/2021 18:08 (7), 04/14/2021 18:13 (1), 12/31/2024 08:22 (16), 01/07/2025 23:45 (1)
Complete: 🔍
Committer:
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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