iPolicy Networks Security Advisory
 

Microsoft Internet Explorer toStaticHTML API Information Disclosure Vulnerability

Date Discovered: 06/08/2010
Severity: High
Operating Systems Affected: Microsoft Windows 2000 Service Pack 4
Windows XP SP 2
Windows XP SP 3
Windows XP Professional x64 Edition SP 2
Windows Server 2003 SP 2
Windows Server 2003 x64 Edition SP 2
Windows Server 2003 SP2 for Itanium-based Systems
Windows Vista SP 1
Windows Vista SP 2
Windows Vista x64 Edition SP 1
Windows Vista x64 Edition SP 2
Windows Server 2008 for 32-bit Systems
Windows Server 2008 for 32-bit Systems SP 2
Windows Server 2008 for x64-based Systems
Windows Server 2008 for x64-based Systems SP 2
Windows Server 2008 for Itanium-based Systems
Windows Server 2008 for Itanium-based Systems SP 2
Application Affected: Internet Explorer 5.01 Service Pack 4
Internet Explorer 6 Service Pack 1
Internet Explorer 6
Internet Explorer 7
Internet Explorer 8
Identifiers: CVE-2010-1257
Synopsis
Microsoft Internet explorer is prone to information disclosure vulnerability which could disclose sensitive information to remote attacker.
Recommended Actions
Update the patches as guided by vendor at :
http://www.microsoft.com/technet/security/bulletin/MS10-035.mspx
Threat Analysis
Information disclosure vulnerability exists in Microsoft Internet explorer. Vulnerability is caused due to improper sanitization of HTML while handling specific strings in toStaticHTML API.

A remote attacker could exploit the vulnerability by tricking the user to visit a specially crafted Web page that could allow information disclosure. Successful exploitation of the vulnerability could allow an attacker to cross-site scripting on the user.
References

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2010-1257

Write-up by: Anupam Kumar