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Vulnerability Details : CVE-2011-0654 (1 public exploit)

Integer underflow in the BowserWriteErrorLogEntry function in the Common Internet File System (CIFS) browser service in Mrxsmb.sys or bowser.sys in Active Directory 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 allows remote attackers to execute arbitrary code or cause a denial of service (system crash) via a malformed BROWSER ELECTION message, leading to a heap-based buffer overflow, aka "Browser Pool Corruption Vulnerability." NOTE: some of these details are obtained from third party information.
Publish Date : 2011-02-15 Last Update Date : 2018-10-12
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- CVSS Scores & Vulnerability Types

CVSS Score
Confidentiality Impact Complete (There is total information disclosure, resulting in all system files being revealed.)
Integrity Impact Complete (There is a total compromise of system integrity. There is a complete loss of system protection, resulting in the entire system being compromised.)
Availability Impact Complete (There is a total shutdown of the affected resource. The attacker can render the resource completely unavailable.)
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) Denial Of ServiceExecute CodeOverflow
CWE ID 119

- Related OVAL Definitions

Title Definition Id Class Family
Browser Pool Corruption Vulnerability oval:org.mitre.oval:def:12637 windows
MS11-019: Vulnerabilities in SMB Client Could Allow Remote Code Execution (2511455) oval:gov.nist.fdcc.patch:def:11742 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-2011-0654

# Product Type Vendor Product Version Update Edition Language
1 OS Microsoft Windows 2003 Server Version Details Vulnerabilities
2 OS Microsoft Windows 2003 Server R2 Version Details Vulnerabilities
3 OS Microsoft Windows 2003 Server R2 X64 Version Details Vulnerabilities
4 OS Microsoft Windows 2003 Server SP2 Itanium Version Details Vulnerabilities
5 OS Microsoft Windows Server 2003 SP2 Version Details Vulnerabilities
6 OS Microsoft Windows Server 2003 SP2 Itanium Version Details Vulnerabilities
7 OS Microsoft Windows Server 2003 SP2 X64 Version Details Vulnerabilities
8 OS Microsoft Windows Server 2003 X64 Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Microsoft Windows 2003 Server 4
Microsoft Windows Server 2003 4

- References For CVE-2011-0654
MS MS11-019
VUPEN ADV-2011-0394
XF ms-win-server-browser-bo(65376)
VUPEN ADV-2011-0938
CERT TA11-102A
BID 46360 Microsoft Windows 'BROWSER ELECTION' Buffer Overflow Vulnerability Release Date:2011-04-13
EXPLOIT-DB 16166 Microsoft Windows 2003 - AD Pre-Auth BROWSER ELECTION Remote Heap Overflow Author:Cupidon-3005 Release Date:2011-02-14 (windows) dos
FULLDISC 20110214 MS Windows Server 2003 AD Pre-Auth BROWSER ELECTION Remote Heap Overflow CONFIRM
SECTRACK 1025328

- Metasploit Modules Related To CVE-2011-0654

Microsoft Windows Browser Pool DoS
This module exploits a denial of service flaw in the Microsoft Windows SMB service on versions of Windows Server 2003 that have been configured as a domain controller. By sending a specially crafted election request, an attacker can cause a pool overflow. The vulnerability appears to be due to an error handling a length value while calculating the amount of memory to copy to a buffer. When there are zero bytes left in the buffer, the length value is improperly decremented and an integer underflow occurs. The resulting value is used in several calculations and is then passed as the length value to an inline memcpy operation. Unfortunately, the length value appears to be fixed at -2 (0xfffffffe) and causes considerable damage to kernel heap memory. While theoretically possible, it does not appear to be trivial to turn this vulnerability into remote (or even local) code execution.
Module type : auxiliary Rank : normal

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