Microsoft Windows Server 2003 SMB Browser memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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5.7$0-$5k0.10

Summaryinfo

A vulnerability has been found in Microsoft Windows Server 2003 and classified as problematic. Affected by this vulnerability is an unknown functionality of the component SMB Browser. The manipulation leads to memory corruption. This vulnerability is documented as CVE-2011-0654. The attack can be initiated remotely. Additionally, an exploit exists. It is recommended to apply restrictive firewalling.

Detailsinfo

A vulnerability was found in Microsoft Windows Server 2003 (Operating System). It has been rated as problematic. This issue affects an unknown part of the component SMB Browser. The manipulation with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. Impacted is availability. The summary by CVE is:

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.

The bug was discovered 02/14/2011. The weakness was released 02/15/2011 by Cupidon-3005 (Full-Disclosure). The advisory is shared at archives.neohapsis.com. The identification of this vulnerability is CVE-2011-0654 since 01/28/2011. 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.

A public exploit has been developed by Cupidon-3005 and been published before and not just after the advisory. The exploit is available at archives.neohapsis.com. It is declared as highly functional. The vulnerability was handled as a non-public zero-day exploit for at least 1 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 53376 (MS11-019: Vulnerabilities in SMB Client Could Allow Remote Code Execution (2511455)), 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 90692 (Microsoft SMB Client Remote Code Execution Vulnerability (MS11-019)).

Applying a patch is able to eliminate this problem. The bugfix is ready for download at windowsupdate.microsoft.com.Addressing this vulnerability is possible by firewalling . The best possible mitigation is suggested to be applying a restrictive firewalling. A possible mitigation has been published 2 months after the disclosure of the vulnerability. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 10855.

The vulnerability is also documented in the databases at X-Force (65376), Exploit-DB (16166), Tenable (53376), SecurityFocus (BID 46360†) and OSVDB (70881†). Entry connected to this vulnerability is available at VDB-57080. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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CVSSv4info

VulDB Vector: 🔍
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CVSSv3info

VulDB Meta Base Score: 5.9
VulDB Meta Temp Score: 5.7

VulDB Base Score: 5.9
VulDB Temp Score: 5.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Highly functional
Author: Cupidon-3005
Download: 🔍

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Nessus ID: 53376
Nessus Name: MS11-019: Vulnerabilities in SMB Client Could Allow Remote Code Execution (2511455)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 801598
OpenVAS Name: Microsoft Windows2k3 Active Directory BROWSER ELECTION Buffer Overflow Vulnerability
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

MetaSploit ID: ms11_019_electbowser.rb
MetaSploit Name: Microsoft Windows Browser Pool DoS
MetaSploit File: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

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Countermeasuresinfo

Recommended: Firewall
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Patch: windowsupdate.microsoft.com
TippingPoint: 🔍

McAfee IPS: 🔍
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ISS Proventia IPS: 🔍
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Timelineinfo

01/28/2011 🔍
02/14/2011 +17 days 🔍
02/14/2011 +0 days 🔍
02/14/2011 +0 days 🔍
02/14/2011 +0 days 🔍
02/14/2011 +0 days 🔍
02/15/2011 +1 days 🔍
02/15/2011 +0 days 🔍
02/15/2011 +0 days 🔍
02/17/2011 +2 days 🔍
02/18/2011 +1 days 🔍
04/12/2011 +52 days 🔍
04/12/2011 +0 days 🔍
04/13/2011 +1 days 🔍
01/06/2025 +5017 days 🔍

Sourcesinfo

Vendor: microsoft.com
Product: microsoft.com

Advisory: archives.neohapsis.com
Researcher: Cupidon-3005
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2011-0654 (🔍)
GCVE (CVE): GCVE-0-2011-0654
GCVE (VulDB): GCVE-100-4301

OVAL: 🔍

CERT: 🔍
X-Force: 65376 - Microsoft Windows Server CIFS code execution
SecurityFocus: 46360 - Microsoft Windows 'BROWSER ELECTION' Buffer Overflow Vulnerability
Secunia: 43299
OSVDB: 70881 - Microsoft Windows SMB Browser Election Request Server Name String Overflow
SecurityTracker: 1025328
Vulnerability Center: 29765 - [MS11-019] Microsoft Windows BROWSER ELECTION Remote Arbitrary Code Execution Vulnerability, Critical
Vupen: ADV-2011-0394

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

Entryinfo

Created: 02/17/2011 16:44
Updated: 01/06/2025 02:19
Changes: 02/17/2011 16:44 (113), 07/30/2019 18:26 (5), 01/06/2025 02:19 (23)
Complete: 🔍
Cache ID: 216:A71:103

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