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Microsoft Internet Explorer PNG Image Rendering Buffer Overflow Vulnerability

Risk
High

Date Discovered
06-14-2005

Description
Microsoft Internet Explorer is prone to a buffer overflow vulnerability. This issue exists in the PNG image rendering library used by the browser.

Successful exploitation will result in execution of arbitrary code in the context of the currently logged in user.

This issue is present in the PNG image rendering library, so it is possible that other applications that use the library are affected. This is not confirmed and Symantec is not aware of any such applications.

Symantec Vulnerability Assessment
Symantec Vulnerability Assessment detects and reports this vulnerability. Click here for the advisory released June 15, 2005.

Symantec Enterprise Security Manager
Symantec Enterprise Security Manager™ posted an update to the OS Patch Policy that detects and reports systems that are not patched against this vulnerability. Click here for the advisory released June 16, 2005.

Symantec Enterprise Security Manager Network Assessment Module
Symantec Enterprise Security Manager Network Assessment Module detects and reports this vulnerability. Click here for the advisory released August 9, 2005.

Platforms Affected
Microsoft Windows 2000 Advanced Server
Microsoft Windows 2000 Advanced Server SP1
Microsoft Windows 2000 Advanced Server SP2
Microsoft Windows 2000 Datacenter Server
Microsoft Windows 2000 Datacenter Server SP1
Microsoft Windows 2000 Datacenter Server SP2
Microsoft Windows 2000 Professional
Microsoft Windows 2000 Professional SP1
Microsoft Windows 2000 Professional SP2
Microsoft Windows 2000 Server
Microsoft Windows 2000 Server SP1
Microsoft Windows 2000 Server SP2
Microsoft Windows 2000 Terminal Services
Microsoft Windows 2000 Terminal Services SP1
Microsoft Windows 2000 Terminal Services SP2
Microsoft Windows 95
Microsoft Windows 98
Microsoft Windows 98SE
Microsoft Windows ME
Microsoft Windows NT Enterprise Server 4.0
Microsoft Windows NT Enterprise Server 4.0 SP1
Microsoft Windows NT Enterprise Server 4.0 SP2
Microsoft Windows NT Enterprise Server 4.0 SP3
Microsoft Windows NT Enterprise Server 4.0 SP4
Microsoft Windows NT Enterprise Server 4.0 SP5
Microsoft Windows NT Enterprise Server 4.0 SP6
Microsoft Windows NT Enterprise Server 4.0 SP6a
Microsoft Windows NT Server 4.0
Microsoft Windows NT Server 4.0 SP1
Microsoft Windows NT Server 4.0 SP2
Microsoft Windows NT Server 4.0 SP3
Microsoft Windows NT Server 4.0 SP4
Microsoft Windows NT Server 4.0 SP5
Microsoft Windows NT Server 4.0 SP6
Microsoft Windows NT Server 4.0 SP6a
Microsoft Windows NT Terminal Server 4.0
Microsoft Windows NT Terminal Server 4.0 SP1
Microsoft Windows NT Terminal Server 4.0 SP2
Microsoft Windows NT Terminal Server 4.0 SP3
Microsoft Windows NT Terminal Server 4.0 SP4
Microsoft Windows NT Terminal Server 4.0 SP5
Microsoft Windows NT Terminal Server 4.0 SP6
Microsoft Windows NT Workstation 4.0
Microsoft Windows NT Workstation 4.0 SP1
Microsoft Windows NT Workstation 4.0 SP2
Microsoft Windows NT Workstation 4.0 SP3
Microsoft Windows NT Workstation 4.0 SP4
Microsoft Windows NT Workstation 4.0 SP5
Microsoft Windows NT Workstation 4.0 SP6
Microsoft Windows NT Workstation 4.0 SP6a
Microsoft Windows Server 2003 Datacenter Edition
Microsoft Windows Server 2003 Datacenter Edition 64-bit
Microsoft Windows Server 2003 Enterprise Edition
Microsoft Windows Server 2003 Enterprise Edition 64-bit
Microsoft Windows Server 2003 Standard Edition
Microsoft Windows Server 2003 Web Edition
Microsoft Windows XP Home
Microsoft Windows XP Professional

Components Affected
Microsoft Internet Explorer 5.0.1 SP4
Microsoft Internet Explorer 5.0.1 SP3
Microsoft Internet Explorer 5.0.1 SP2
Microsoft Internet Explorer 5.0.1 SP1
Microsoft Internet Explorer 5.0.1
Microsoft Internet Explorer 5.5 SP2
Microsoft Internet Explorer 5.5 SP1
Microsoft Internet Explorer 5.5
Microsoft Internet Explorer 6.0 SP2
Microsoft Internet Explorer 6.0 SP1
Microsoft Internet Explorer 6.0

Recommendations
Do not accept or execute files from untrusted or unknown sources.
Users should avoid accepting or opening unexpected files, especially if they arrive in email from an untrusted or unfamiliar source.

Do not follow links provided by unknown or untrusted sources.
Users should be wary of visiting Web sites of questionable integrity, especially if solicited to do so by an unfamiliar or untrusted source through email or other means. This may limit exposure to many Web-based attacks.

Implement multiple redundant layers of security.
Memory protection schemes such as non-executable stack/heap configurations and randomly mapped memory segments may complicate exploitation of memory corruption vulnerabilities.

Run all software as a non-privileged user with minimal access rights.
All non-administrative activities should be performed as an unprivileged user with minimal access rights. This will limit the impact of vulnerabilities that may be exploited through Web or email attack vectors.

Microsoft has released a cumulative update for Internet Explorer to address supported versions of the browser. Fixes for Windows 98/SE/ME can be obtained through Windows Update.


Microsoft Internet Explorer 5.0.1 SP4:

Microsoft Patch Cumulative Security Update for Internet Explorer 5.01 for Windows 2000 Service Pack 4 (KB883939)
http://www.microsoft.com/downloads/details.aspx?FamilyId=703859AF-CDD5-4348-8916-472A3FDF8667

Microsoft Internet Explorer 5.0.1 SP3:
Microsoft Patch Cumulative Security Update for Internet Explorer 5.01 for Windows 2000 Service Pack 3 (KB883939)
http://www.microsoft.com/downloads/details.aspx?FamilyId=5F577A83-67C6-45AE-B5C5-10D7C7FFA3D3

Microsoft Internet Explorer 5.0.1 SP2:
Microsoft Internet Explorer 5.0.1 SP1:
Microsoft Internet Explorer 5.0.1:
Microsoft Internet Explorer 5.5 SP2:
Microsoft Internet Explorer 5.5 SP1:
Microsoft Internet Explorer 5.5:
Microsoft Internet Explorer 6.0 SP2:
Microsoft Patch Cumulative Security Update for Internet Explorer for Windows XP Service Pack 2 (KB883939)
http://www.microsoft.com/downloads/details.aspx?familyid=36EC67CA-94F6-4E55-ADCD-4406A3D6AADE&displaylang=en

Microsoft Internet Explorer 6.0 SP1:
Microsoft Patch Cumulative Security Update for Internet Explorer 6 Service Pack 1 for Windows XP/2000 (KB883939)
http://www.microsoft.com/downloads/details.aspx?familyid=A1809B9B-9B0F-4A9C-84A5-56B774920313&displaylang=en
Microsoft Patch Cumulative Security Update for Internet Explorer 6 SP1 64-bit Edition (KB883939)
http://www.microsoft.com/downloads/details.aspx?familyid=6AAE593C-8FFD-443F-B9AC-3F9F0F20A2EB&displaylang=en

Microsoft Internet Explorer 6.0:
Microsoft Patch Cumulative Security Update for Internet Explorer for Windows Server 2003 (KB883939)
http://www.microsoft.com/downloads/details.aspx?familyid=2C58B8F7-4F2D-44DA-80EF-B83667B5AFD7&displaylang=en
Microsoft Patch Cumulative Security Update for Internet Explorer for Windows Server 2003 Itanium 64-bit (KB883939)
http://www.microsoft.com/downloads/details.aspx?familyid=77E601E9-4EED-4671-8F3E-AD58A1E88041&displaylang=en
Microsoft Patch Cumulative Security Update for Internet Explorer for Windows Server 2003 x64-bit Edition (KB883939)
http://www.microsoft.com/downloads/details.aspx?familyid=1A7087F1-3AF2-4B33-9F04-6159FAA34C31&displaylang=en

References
Source: Microsoft Security Bulletin MS05-025
URL: http://www.microsoft.com/technet/security/bulletin/MS05-025.mspx

Credits
Discovery is credited to Neel Mehta of ISS X-Force.


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