CVE-2014-1818 in Windows
Summary
by MITRE
GDI+ in Microsoft Windows Server 2003 SP2, Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8, Windows 8.1, Windows Server 2012 Gold and R2, Windows RT Gold and 8.1, Office 2007 SP3 and 2010 SP1 and SP2, Live Meeting 2007 Console, Lync 2010 and 2013, Lync 2010 Attendee, and Lync Basic 2013 allows remote attackers to execute arbitrary code via a crafted EMF+ record in an image file, aka "GDI+ Image Parsing Vulnerability."
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Analysis
by VulDB Data Team • 06/22/2021
The vulnerability identified as CVE-2014-1818 represents a critical heap-based buffer overflow in the Graphics Device Interface Plus component of Microsoft Windows operating systems and Office applications. This flaw exists within the GDI+ image parsing functionality that processes Enhanced Metafile Plus (.emf+) format files, which are commonly used for storing vector graphics and complex image data. The vulnerability affects a broad range of Microsoft products including Windows Server 2003 through Windows 8.1, Office 2007 through 2013, and various Lync and Live Meeting applications, making it one of the most widely impacted vulnerabilities in Microsoft's product portfolio. The flaw stems from insufficient bounds checking when processing crafted EMF+ records within image files, allowing attackers to manipulate memory allocation and execution flow through maliciously constructed image data.
The technical exploitation of this vulnerability occurs when a user opens or previews a specially crafted image file containing malicious EMF+ records. The GDI+ component fails to properly validate the size and structure of these records before attempting to process them, leading to heap corruption that can be leveraged to execute arbitrary code with the privileges of the affected application. This vulnerability maps directly to CWE-121, Heap-based Buffer Overflow, and CWE-787, Out-of-bounds Write, as the flaw involves writing data beyond the allocated buffer boundaries in heap memory. Attackers can construct malicious image files that trigger the buffer overflow during normal image rendering operations, effectively bypassing typical security restrictions. The vulnerability is particularly dangerous because it can be triggered through multiple attack vectors including email attachments, web downloads, and file sharing scenarios, making it highly suitable for social engineering campaigns.
The operational impact of CVE-2014-1818 extends far beyond simple code execution, as it provides attackers with persistent access to compromised systems. Once successfully exploited, adversaries can establish backdoors, escalate privileges, and maintain long-term presence on target networks. The vulnerability's broad compatibility across multiple Microsoft products means that organizations with diverse technology stacks face significant exposure risk. From an adversary perspective, this vulnerability aligns with ATT&CK technique T1059.007 for Command and Scripting Interpreter and T1068 for Exploitation for Privilege Escalation, as attackers can leverage the initial code execution to gain deeper system access. The vulnerability's remote exploit capability makes it particularly attractive for large-scale attacks, as it requires no user interaction beyond opening the malicious file, and can be delivered through various channels including phishing emails, compromised websites, and file sharing platforms.
Organizations affected by this vulnerability should implement immediate mitigations including applying Microsoft security patches, implementing application whitelisting policies, and deploying network-based intrusion detection systems to monitor for exploitation attempts. The recommended approach involves disabling automatic image preview functionality for untrusted content, restricting user permissions for image processing applications, and implementing strict file type validation controls. Additionally, security teams should conduct comprehensive vulnerability assessments to identify potentially exposed systems and establish monitoring protocols for suspicious file access patterns. Microsoft's official security advisory recommends immediate patch deployment, as the vulnerability does not require user interaction beyond opening a malicious image file, making it particularly dangerous in targeted attack scenarios. Organizations should also consider implementing sandboxing technologies for image processing operations and establishing incident response procedures specifically designed to handle such exploitation attempts.