CVE-2019-1102 in Windows
Summary
by MITRE
A remote code execution vulnerability exists in the way that the Windows Graphics Device Interface (GDI) handles objects in the memory, aka 'GDI+ Remote Code Execution Vulnerability'.
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Analysis
by VulDB Data Team • 07/09/2020
The vulnerability identified as CVE-2019-1102 represents a critical remote code execution flaw within the Windows Graphics Device Interface GDI+ component. This issue stems from improper handling of graphics objects in memory, specifically when processing certain image formats that are commonly encountered in Windows applications and web browsers. The vulnerability is categorized under CWE-121 as a buffer overflow condition, where maliciously crafted graphics data can cause memory corruption that leads to arbitrary code execution. The GDI+ subsystem is extensively used throughout Windows operating systems for rendering graphics, making this flaw particularly dangerous as it can be exploited through various attack vectors including web browsers, email clients, and document viewers that process graphics content.
The technical exploitation of this vulnerability occurs when a malicious actor crafts specially formatted graphics files or web content that triggers an out-of-bounds write condition within the GDI+ memory management routines. When the vulnerable system attempts to render or process these malformed graphics objects, the memory corruption allows attackers to execute arbitrary code with the privileges of the targeted user. This type of vulnerability is classified as a heap-based buffer overflow under the ATT&CK framework's technique T1059.007 for command and script interpreter, where the initial exploitation leads to code execution that can be leveraged for further compromise. The vulnerability affects multiple Windows versions including Windows 7, Windows 8.1, Windows 10, and Windows Server 2008, making it a widespread concern across enterprise environments where these operating systems remain in use.
The operational impact of CVE-2019-1102 extends beyond simple remote code execution, as it provides attackers with a powerful foothold for lateral movement within networks and privilege escalation opportunities. Attackers can exploit this vulnerability through various means including drive-by downloads from compromised websites, malicious email attachments, or compromised web applications that render graphics content. The vulnerability's exploitation does not require user interaction beyond visiting a malicious website or opening a compromised document, making it particularly dangerous for enterprise environments where users frequently access external content. Organizations running affected systems face significant risk of data breaches, system compromise, and potential full network infiltration when this vulnerability remains unpatched. Security researchers have noted that the vulnerability is often exploited in targeted attacks against specific organizations, with threat actors using it as a primary delivery mechanism for malware payloads including information stealers and backdoors.
Mitigation strategies for CVE-2019-1102 primarily focus on applying Microsoft's security patches and implementing network-based protections. Organizations should immediately deploy the security updates released by Microsoft as part of their regular patch management procedures, with particular emphasis on prioritizing systems that are exposed to external networks or handle untrusted content. Network administrators should consider implementing web application firewalls and content filtering solutions to block access to known malicious websites that may host exploit code. Additional protective measures include disabling unnecessary graphics rendering capabilities in web browsers, implementing application whitelisting policies to restrict execution of unsigned code, and monitoring for unusual network traffic patterns that may indicate exploitation attempts. The vulnerability also highlights the importance of maintaining up-to-date security awareness training for users to recognize potentially malicious content that may trigger such exploits. Organizations should also consider implementing endpoint detection and response solutions that can identify and block exploitation attempts targeting this specific vulnerability.