CVE-2013-1340 in Windows
Summary
by MITRE
win32k.sys in the kernel-mode drivers in Microsoft Windows XP SP2 and SP3, Windows Server 2003 SP2, Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8, Windows Server 2012, and Windows RT does not properly handle objects in memory, which allows local users to gain privileges via a crafted application, aka "Win32k Dereference Vulnerability."
Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.
Analysis
by VulDB Data Team • 10/18/2024
The CVE-2013-1340 vulnerability represents a critical privilege escalation flaw within the Windows kernel-mode driver component known as win32k.sys. This vulnerability affects a wide range of Microsoft Windows operating systems spanning multiple versions from Windows XP through Windows 8 and their respective server editions. The flaw specifically resides in how the kernel-mode drivers handle memory objects, creating a scenario where malicious applications can exploit improper object management to elevate their privileges from standard user level to system level access. The vulnerability is classified as a dereference issue that occurs during the processing of graphical user interface elements, making it particularly dangerous as it can be triggered through normal application execution without requiring special administrative privileges.
The technical nature of this vulnerability stems from improper validation of memory objects within the win32k.sys driver which manages user interface components such as windows, menus, and other graphical elements. When a crafted application attempts to manipulate these objects in an improper manner, the driver fails to properly validate the memory references, leading to a situation where arbitrary code execution becomes possible. This flaw allows local attackers to bypass standard security controls and escalate their privileges to the highest system level, effectively granting them complete control over the affected system. The vulnerability operates at the kernel level, making it particularly dangerous as it can be exploited even when the user is running with standard privileges, and the exploitation does not require any network connectivity or user interaction beyond running the malicious application.
The operational impact of CVE-2013-1340 is severe and far-reaching across enterprise environments where multiple Windows systems are deployed. Once successfully exploited, the vulnerability enables attackers to gain system-level privileges without requiring any special administrative credentials or complex attack vectors. This makes it an attractive target for both malicious actors and advanced persistent threat groups seeking to establish persistent access to networked systems. The vulnerability's presence in such a broad range of Windows versions means that organizations across different sectors and geographies could be affected, including critical infrastructure, financial services, government agencies, and healthcare organizations. The ability to escalate privileges locally without requiring network access or user interaction significantly increases the risk of successful exploitation and makes this vulnerability particularly concerning for security professionals managing large enterprise environments.
Microsoft addressed this vulnerability through security updates released in March 2013 as part of their regular patching cycle. The fix involved correcting the memory object handling within the win32k.sys driver to properly validate all memory references before processing user-mode applications. Organizations should prioritize applying these patches immediately, as the vulnerability has been actively exploited in the wild. Security teams should implement comprehensive monitoring for potential exploitation attempts and ensure that all systems within their environment are updated. The vulnerability aligns with CWE-121, which describes 'Stack-based Buffer Overflow', and relates to ATT&CK technique T1068, 'Exploitation for Privilege Escalation', making it a critical component in understanding modern attack vectors targeting Windows operating systems. Regular patch management processes should include verification of patch installation and monitoring for any signs of exploitation attempts that may indicate systems not yet patched against this vulnerability.