Microsoft Windows DNS LLMNR Query input validation

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.
8.4$0-$5k0.00

Summaryinfo

A vulnerability described as problematic has been identified in Microsoft Windows. This issue affects some unknown processing of the component DNS. The manipulation as part of LLMNR Query results in input validation. This vulnerability was named CVE-2011-0657. There is no available exploit. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as critical has been found in Microsoft Windows (Operating System) (unknown version). Affected is an unknown code block of the component DNS. The manipulation as part of a LLMNR Query leads to a input validation vulnerability. CWE is classifying the issue as CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

DNSAPI.dll in the DNS client 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 process DNS queries, which allows remote attackers to execute arbitrary code via (1) a crafted LLMNR broadcast query or (2) a crafted application, aka "DNS Query Vulnerability."

The weakness was presented 04/12/2011 by Neel Mehta with Google Inc. as MS11-030 as confirmed bulletin (Technet). The advisory is available at microsoft.com. This vulnerability is traded as CVE-2011-0657 since 01/28/2011. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. The technical details are unknown and an exploit is not available.

It is declared as highly functional. As 0-day the estimated underground price was around $25k-$100k. The vulnerability scanner Nessus provides a plugin with the ID 53387 (MS11-030: Vulnerability in DNS Resolution Could Allow Remote Code Execution (2509553)), 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 90695 (Microsoft DNS Resolution Remote Code Execution Vulnerability (MS11-030)).

Upgrading eliminates this vulnerability. Applying the patch MS11-030 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. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 10997.

The vulnerability is also documented in the databases at X-Force (66442), Tenable (53387), SecurityFocus (BID 47242†), OSVDB (71780†) and Secunia (SA44161†). See VDB-4339, VDB-4335, VDB-4337 and VDB-4336 for similar entries. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

Vendor

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.5
VulDB Meta Temp Score: 8.4

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 9.8
CNA Vector: 🔍

CVSSv2info

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

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

NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Highly functional

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Nessus ID: 53387
Nessus Name: MS11-030: Vulnerability in DNS Resolution Could Allow Remote Code Execution (2509553)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 900282
OpenVAS Name: Microsoft DNS Resolution Remote Code Execution Vulnerability (2509553)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

MetaSploit ID: ms11_030_dnsapi.rb
MetaSploit Name: Microsoft Windows DNSAPI.dll LLMNR Buffer Underrun DoS
MetaSploit File: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Patch: MS11-030
TippingPoint: 🔍

McAfee IPS: 🔍
McAfee IPS Version: 🔍

ISS Proventia IPS: 🔍
PaloAlto IPS: 🔍
Fortigate IPS: 🔍

Timelineinfo

01/28/2011 🔍
04/12/2011 +74 days 🔍
04/12/2011 +0 days 🔍
04/12/2011 +0 days 🔍
04/12/2011 +0 days 🔍
04/13/2011 +0 days 🔍
04/13/2011 +0 days 🔍
04/13/2011 +0 days 🔍
04/18/2011 +5 days 🔍
04/22/2025 +5118 days 🔍

Sourcesinfo

Vendor: microsoft.com
Product: microsoft.com

Advisory: MS11-030
Researcher: Neel Mehta
Organization: Google Inc.
Status: Confirmed

CVE: CVE-2011-0657 (🔍)
GCVE (CVE): GCVE-0-2011-0657
GCVE (VulDB): GCVE-100-4338

OVAL: 🔍
IAVM: 🔍

X-Force: 66442
SecurityFocus: 47242
Secunia: 44161 - Microsoft Windows DNS LLMNR Query Processing Vulnerability, Moderately Critical
OSVDB: 71780 - Microsoft Windows DNS Client Service LLMNR Query Processing Remote Code Execution
SecurityTracker: 1025332
Vulnerability Center: 31074 - [MS11-030] Microsoft Windows Remote Arbitrary Code Execution Vulnerability via Crafted LLMNR Queries, Critical

See also: 🔍

Entryinfo

Created: 04/18/2011 02:00
Updated: 04/22/2025 21:54
Changes: 04/18/2011 02:00 (93), 03/21/2017 10:59 (7), 03/19/2021 09:20 (3), 10/17/2024 23:04 (26), 01/18/2025 19:39 (2), 01/26/2025 19:00 (1), 04/22/2025 21:54 (2)
Complete: 🔍
Cache ID: 216:FCD:103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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!