Microsoft Windows MsgBox() code execution

ms-win-msgbox-code-execution (56558) The risk level is classified as HighHigh Risk

Description:

Microsoft Windows could allow a remote attacker to execute arbitrary code on the system, caused by the automatic opening of HELP (.hlp) files by the VBScript MsgBox() function in winhlp32.exe. By persuading a victim to visit a specially-crafted Web site and pressing the "F1" key in response to the MsgBox popup box, a remote attacker could exploit this vulnerability to execute arbitrary code on the system with elevated privileges.

*CVSS:

Base Score: 5.1
  Access Vector: Network
  Access Complexity: High
  Authentication: None
  Confidentiality Impact: Partial
  Integrity Impact: Partial
  Availability Impact: Partial
 
Temporal Score: 3.8
  Exploitability: Unproven
  Remediation Level: Official-Fix
  Report Confidence: Confirmed

Consequences:

Gain Access

Remedy:

Apply the appropriate patch for your system, as listed in the latest Microsoft Security Bulletin. See References.

— OR —

Use Microsoft Automatic Update if it is supported by your operating system. The original bulletin issued by Microsoft has been superseded.

References:

  • iSEC Security Research: It is possible to invoke winhlp32.exe from Internet Explorer 8,7,6 using VBScript.
  • Microsoft Security Advisory (981169): Vulnerability in VBScript Could Allow Remote Code Execution.
  • Microsoft Security Bulletin MS10-022: Vulnerabilities in VBScript Could Allow Remote Code Execution (981169).
  • Microsoft Security Bulletin MS11-009: Vulnerability in JScript and VBScript Scripting Engines Could Allow Information Disclosure (2475792).
  • Microsoft Security Bulletin MS11-031: Vulnerability in JScript and VBScript Scripting Engines Could Allow Remote Code Execution (2514666).
  • Microsoft Security Bulletin MS12-056: Vulnerability in JScript and VBScript Engines Could Allow Remote Code Execution (2706045).
  • Offensive Security Exploit Database [03-02-2010]: Internet Explorer 'winhlp32.exe' 'MsgBox()' Remote Code Execution Vulnerability .
  • The Microsoft Security Response Center (MSRC): Investigating a new win32hlp and Internet Explorer issue.
  • BID-38463: Microsoft VBScript 'winhlp32.exe' 'MsgBox()' Remote Code Execution Vulnerability
  • BID-38473: Microsoft Internet Explorer 'winhlp32.exe' 'MsgBox()' Stack-Based Buffer Overflow Vulnerability
  • CVE-2010-0483: vbscript.dll in VBScript 5.1, 5.6, 5.7, and 5.8 in Microsoft Windows 2000 SP4, XP SP2 and SP3, and Server 2003 SP2, when Internet Explorer is used, allows user-assisted remote attackers to execute arbitrary code by referencing a (1) local pathname, (2) UNC share pathname, or (3) WebDAV server with a crafted .hlp file in the fourth argument (aka helpfile argument) to the MsgBox function, leading to code execution involving winhlp32.exe when the F1 key is pressed, aka VBScript Help Keypress Vulnerability.
  • OSVDB ID: 62632: Microsoft Windows VBScript MsgBox() Function HLP File Arbitrary Command Execution
  • SA38727: Microsoft Windows "MsgBox()" HLP File Execution Vulnerability
  • SECTRACK ID: 1023668: Windows VBScript Script Engine Flaw in Processing Windows Help Files Lets Remote Users Execute Arbitrary Code
  • US-CERT VU#612021: Internet Explorer VBScript Windows Help arbitrary code execution
  • VUPEN/ADV-2010-0485: Microsoft Windows MsgBox() Help File Code Execution Vulnerability

Platforms Affected:

  • Microsoft Internet Explorer 6.0
  • Microsoft Internet Explorer 7.0
  • Microsoft Internet Explorer 8.0
  • Microsoft VBScript 5.1
  • Microsoft VBScript 5.6
  • Microsoft VBScript 5.7
  • Microsoft VBScript 5.8
  • Microsoft Windows 2000 SP4
  • Microsoft Windows Server 2003 SP2 Itanium
  • Microsoft Windows Server 2003 SP2
  • Microsoft Windows Server 2003 SP2 x64
  • Microsoft Windows XP SP3
  • Microsoft Windows XP SP2
  • Microsoft Windows XP SP2 x64 Professional

Reported:

Feb 26, 2010

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