Microsoft Windows GDI+ and Office TIFF Image Processing Remote Code Execution Vulnerability (CVE-2013-3906)
Executive & SecOps Summary
SECOPS ASSESSMENTWindows Vista SP2, Server 2008 SP2, Office 2003/2007/2010, Lync 2010/2013
Remote attackers can execute arbitrary code via a specially crafted TIFF image embedded in documents or emails
Apply the MS13-096 security patch or implement registry workarounds to disable TIFF rendering in GDI+
Affected Products & Version Scope
Remediation & Live Workaround Commands
PATCH & WORKAROUND1. Official Patch & Version Upgrade Commands
Deploy the official MS13-096 security update to remediate this vulnerability. For legacy systems, the update can be verified and installed via PowerShell.
# Check if the MS13-096 patch (KB2896666) is installed
Get-HotFix -Id KB2896666 -ErrorAction SilentlyContinue
# Force install the security update if missing
Install-WindowsUpdate -KBArticleID KB2896666 -AcceptAll -AutoReboot2. Temporary Workaround & Hardening Configuration
If patching cannot be immediately performed, disable the TIFF codec within GDI+ using the registry to mitigate the attack vector.
Windows Registry Editor Version 5.00
; Registry workaround to disable TIFF image rendering in GDI+
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\GDIPlus]
"DisableTIFFCodec"=dword:00000001
[HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\GDIPlus]
"DisableTIFFCodec"=dword:000000013. Log Audit & IoC Verification Commands
Verify the file version of gdiplus.dll on the system to ensure it has been updated to a non-vulnerable version.
# Audit the file version of gdiplus.dll
$GdiPath = "$env:SystemRoot\System32\gdiplus.dll"
if (Test-Path $GdiPath) {
$VersionInfo = (Get-Item $GdiPath).VersionInfo
Write-Host "Current gdiplus.dll Version: " $VersionInfo.FileVersion
} else {
Write-Host "gdiplus.dll was not found in the standard path."
}Block Kernel Privilege Escalation & Ransomware Payloads Before You Can Reboot
Protect unpatched Windows, Linux, and macOS workloads against in-memory exploitation and lateral movement with autonomous EDR.
Technical Root Cause & Exploitation Mechanics
1. Vulnerability Overview & Root Cause
This vulnerability (CVE-2013-3906) exists in the Microsoft Graphics Device Interface (GDI+) component when parsing Tagged Image File Format (TIFF) images. The root cause is an input validation failure within the GDI+ engine when handling specific TIFF tags and compression fields, leading to an out-of-bounds memory write (buffer overflow) and subsequent arbitrary code execution.
2. Exploitation Mechanics & Attack Scenario
An attacker exploits this vulnerability by crafting a malicious TIFF image and embedding it within an Office document (such as a Word file) or an email. When a user opens the document or previews the email, the vulnerable GDI+ library is triggered to render the image. This corrupts the system memory, allowing the attacker's payload (shellcode) to execute under the security context of the current user. This flaw was actively exploited in the wild as a zero-day in late 2013.
3. Infrastructure & Business Impact
With a CVSS score of 7.8 and an EPSS score of 0.8485, this vulnerability is highly critical and is listed on the CISA KEV catalog. Successful exploitation grants the attacker full control over the compromised endpoint, serving as an initial access vector into corporate networks, which can lead to lateral movement, data exfiltration, or ransomware deployment.
Official Vendor Advisories & References
GDI+ in Microsoft Windows Vista SP2 and Server 2008 SP2; Office 2003 SP3, 2007 SP3, and 2010 SP1 and SP2; Office Compatibility Pack SP3; and Lync 2010, 2010 Attendee, 2013, and Basic 2013 allows remote attackers to execute arbitrary code via a crafted TIFF image, as demonstrated by an image in a Word document, and exploited in the wild in October and November 2013.
Frequently Asked SecOps Questions (CVE-2013-3906)
FAQQ1. How critical is CVE-2013-3906 and is it actively exploited in the wild?
CVE-2013-3906 is rated CVSS 7.8 (HIGH) with a 30-day EPSS exploitation probability of 84.9%. It is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, requiring immediate emergency remediation.
Q2. Which vendors and products are affected by CVE-2013-3906?
Primary impacted vendors include microsoft across windows, office, lync, office_compatibility_pack. Scope summary: Windows Vista SP2, Windows Server 2008 SP2, Office 2003 SP3, Office 2007 SP3, Office 2010 SP1/SP2, Office Compatibility Pack SP3, Lync 2010/2013
Q3. What temporary mitigations or workarounds exist for CVE-2013-3906 before patching?
[Mitigation] Apply the MS13-096 security patch or implement registry workarounds to disable TIFF rendering in GDI+ Follow the CLI remediation commands and interactive SecOps checklist on this page to restrict exposure prior to your maintenance window.
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