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Vulnerability Details : CVE-2011-0657

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."
Publish Date : 2011-04-13 Last Update Date : 2011-10-04
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- CVSS Scores & Vulnerability Types

Cvss Score
7.5
Confidentiality Impact Partial (There is considerable informational disclosure.)
Integrity Impact Partial (Modification of some system files or information is possible, but the attacker does not have control over what can be modified, or the scope of what the attacker can affect is limited.)
Availability Impact Partial (There is reduced performance or interruptions in resource availability.)
Access Complexity Low (Specialized access conditions or extenuating circumstances do not exist. Very little knowledge or skill is required to exploit. )
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s) Execute Code
CWE ID 20

- Related OVAL Definitions

Title Definition Id Class Family
DNS Query Vulnerability oval:org.mitre.oval:def:11902 windows
MS11-030: Vulnerability in DNS Resolution Could Allow Remote Code Execution (2509553) oval:gov.nist.fdcc.patch:def:11749 windows
OVAL (Open Vulnerability and Assessment Language) definitions define exactly what should be done to verify a vulnerability or a missing patch. Check out the OVAL definitions if you want to learn what you should do to verify a vulnerability.

- Products Affected By CVE-2011-0657

# Product Type Vendor Product Version Update Edition Language
1 OS Microsoft Windows 2003 Server SP2 Details Vulnerabilities
2 OS Microsoft Windows 7 - - X32 Details Vulnerabilities
3 OS Microsoft Windows 7 - SP1 X32 Details Vulnerabilities
4 OS Microsoft Windows 7 - - X64 Details Vulnerabilities
5 OS Microsoft Windows 7 - SP1 X64 Details Vulnerabilities
6 OS Microsoft Windows Server 2003 SP2 X64 Details Vulnerabilities
7 OS Microsoft Windows Server 2003 SP2 Itanium Details Vulnerabilities
8 OS Microsoft Windows Server 2008 - SP2 Itanium Details Vulnerabilities
9 OS Microsoft Windows Server 2008 Itanium Details Vulnerabilities
10 OS Microsoft Windows Server 2008 X32 Details Vulnerabilities
11 OS Microsoft Windows Server 2008 SP2 X32 Details Vulnerabilities
12 OS Microsoft Windows Server 2008 X64 Details Vulnerabilities
13 OS Microsoft Windows Server 2008 SP2 X64 Details Vulnerabilities
14 OS Microsoft Windows Server 2008 R2 X64 Details Vulnerabilities
15 OS Microsoft Windows Server 2008 R2 SP1 X64 Details Vulnerabilities
16 OS Microsoft Windows Server 2008 R2 Itanium Details Vulnerabilities
17 OS Microsoft Windows Server 2008 R2 SP1 Itanium Details Vulnerabilities
18 OS Microsoft Windows Vista SP2 X64 Details Vulnerabilities
19 OS Microsoft Windows Vista SP1 Details Vulnerabilities
20 OS Microsoft Windows Vista SP2 Details Vulnerabilities
21 OS Microsoft Windows Vista SP1 X64 Details Vulnerabilities
22 OS Microsoft Windows Xp - SP2 X64 Details Vulnerabilities
23 OS Microsoft Windows Xp SP2 Details Vulnerabilities
24 OS Microsoft Windows Xp SP3 Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Microsoft Windows 2003 Server 1
Microsoft Windows 7 4
Microsoft Windows Server 2003 2
Microsoft Windows Server 2008 10
Microsoft Windows Vista 4
Microsoft Windows Xp 3

- References For CVE-2011-0657

http://technet.microsoft.com/en-us/security/bulletin/ms11-030
Microsoft Security Bulletin MS11-030 MS11-030 - Critical : Vulnerability in DNS Resolution Could Allow Remote Code Execution (2509553) - Version: 1.1 Severity Rating: Critical Revision Note: V1.1 (March 13, 2012): Added a link to Microsoft Knowledge Base Article 2509553 under Known Issues in the Executive Summary. Summary: This security update resolves a privately reported vulnerability in Windows DNS resolution. The vulnerability could allow remote code execution if an attacker gained access to the network and then created a custom program to send specially crafted LLMNR broadcast queries to the target systems. Firewall best practices and standard default firewall configurations can help protect networks from attacks that originate outside the enterprise perimeter. Best practices recommend that systems that are connected to the Internet have a minimal number of ports exposed. In this case, the LLMNR ports should be blocked from the Internet.Release Date:2012-03-13
http://www.securitytracker.com/id?1025332
SECTRACK 1025332
http://www.securityfocus.com/bid/47242
BID 47242 Microsoft Windows CVE-2011-0657 DNS Resolution Remote Code Execution Vulnerability Release Date:2011-04-13
http://secunia.com/advisories/44161
SECUNIA 44161
http://www.vupen.com/english/advisories/2011/0948
VUPEN ADV-2011-0948
http://osvdb.org/71780
OSVDB 71780 Microsoft Windows DNS Client Service LLMNR Query Processing Remote Code Execution Microsoft Windows DNS Client Service LLMNR Query Processing Remote Code Execution
http://www.us-cert.gov/cas/techalerts/TA11-102A.html
CERT TA11-102A

- Metasploit Modules Related To CVE-2011-0657

Microsoft Windows DNSAPI.dll LLMNR Buffer Underrun DoS
This module exploits a buffer underrun vulnerability in Microsoft's DNSAPI.dll as distributed with Windows Vista and later without KB2509553. By sending a specially crafted LLMNR query, containing a leading '.' character, an attacker can trigger stack exhaustion or potentially cause stack memory corruption. Although this vulnerability may lead to code execution, it has not been proven to be possible at the time of this writing. NOTE: In some circumstances, a '.' may be found before the top of the stack is reached. In these cases, this module may not be able to cause a crash.


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