Microsoft Windows Ancillary Function Driver access control

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
7.7$0-$5k0.00

Summaryinfo

A vulnerability was found in Microsoft Windows. It has been rated as problematic. Impacted is an unknown function of the component Ancillary Function Driver. The manipulation leads to access control. This vulnerability is documented as CVE-2011-1249. Additionally, an exploit exists. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Microsoft Windows (Operating System) (version unknown) and classified as critical. This issue affects an unknown function of the component Ancillary Function Driver. The manipulation with an unknown input leads to a access control vulnerability. Using CWE to declare the problem leads to CWE-264. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

The Ancillary Function Driver (AFD) in afd.sys in Microsoft Windows XP SP2 and SP3, Windows Server 2003 SP2, Windows Vista SP1 and SP2, Windows Server 2008 Gold, SP2, R2, and R2 SP1, and Windows 7 Gold and SP1 does not properly validate user-mode input, which allows local users to gain privileges via a crafted application, aka "Ancillary Function Driver Elevation of Privilege Vulnerability."

The weakness was released 06/14/2011 by Steven Adair (Shadow) as MS11-046 as confirmed bulletin (Technet). The advisory is shared at microsoft.com. The identification of this vulnerability is CVE-2011-1249 since 03/04/2011. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details are unknown but a public exploit is available. MITRE ATT&CK project uses the attack technique T1068 for this issue.

A public exploit has been developed by Tomislav Paskalev in ANSI C and been published 6 years after the advisory. The exploit is available at securityfocus.com. It is declared as attacked. We expect the 0-day to have been worth approximately $25k-$100k. The vulnerability scanner Nessus provides a plugin with the ID 55126 (MS11-046: Vulnerability in Ancillary Function Driver Could Allow Elevation of Privilege (2503665)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Windows : Microsoft Bulletins and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 90717 (Microsoft Ancillary Function Driver Elevation of Privileges Vulnerability (MS11-046)).

Upgrading eliminates this vulnerability. Applying the patch MS11-046 is able to eliminate this problem. The bugfix is ready for download at microsoft.com. The best possible mitigation is suggested to be upgrading to the latest version. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Exploit-DB (40564), Zero-Day.cz (378), Tenable (55126), SecurityFocus (BID 48198†) and Secunia (SA44907†). Entries connected to this vulnerability are available at VDB-4362, VDB-4364, VDB-4363 and VDB-4365. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Vendor

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.1
VulDB Meta Temp Score: 7.7

VulDB Base Score: 8.1
VulDB Temp Score: 7.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Access control
CWE: CWE-264
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Access: Public
Status: Attacked
Author: Tomislav Paskalev
Programming Language: 🔍
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Nessus ID: 55126
Nessus Name: MS11-046: Vulnerability in Ancillary Function Driver Could Allow Elevation of Privilege (2503665)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 902442
OpenVAS Name: MS Windows Ancillary Function Driver Privilege Elevation Vulnerability
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍
Zero-Day.cz: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍
Exploit Delay Time: 🔍

Patch: MS11-046

Timelineinfo

03/04/2011 🔍
06/14/2011 +102 days 🔍
06/14/2011 +0 days 🔍
06/14/2011 +0 days 🔍
06/14/2011 +0 days 🔍
06/14/2011 +0 days 🔍
06/15/2011 +1 days 🔍
06/15/2011 +0 days 🔍
06/16/2011 +1 days 🔍
06/20/2011 +4 days 🔍
10/18/2016 +1947 days 🔍
10/18/2016 +0 days 🔍
01/15/2025 +3011 days 🔍

Sourcesinfo

Vendor: microsoft.com
Product: microsoft.com

Advisory: MS11-046
Researcher: Steven Adair (Shadow)
Status: Confirmed

CVE: CVE-2011-1249 (🔍)
GCVE (CVE): GCVE-0-2011-1249
GCVE (VulDB): GCVE-100-4361

OVAL: 🔍
IAVM: 🔍

SecurityFocus: 48198 - Microsoft Windows 'AFD.sys' Driver Local Privilege Escalation Vulnerability
Secunia: 44907 - Windows Ancillary Function Driver Privilege Escalation Vulnerability, Moderately Critical
Vulnerability Center: 31781 - [MS11-046] Microsoft Windows Ancillary Function Driver Local Privilege Elevation Vulnerability, High

scip Labs: https://www.scip.ch/en/?labs.20161013
See also: 🔍

Entryinfo

Created: 06/20/2011 02:00
Updated: 01/15/2025 20:21
Changes: 06/20/2011 02:00 (82), 03/24/2017 07:56 (17), 03/19/2021 10:51 (3), 07/16/2024 08:36 (22), 01/15/2025 20:21 (2)
Complete: 🔍
Cache ID: 216:2EB:103

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

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Want to know what is going to be exploited?

We predict KEV entries!