CVE-2015-1725 in Windows
Summary
by MITRE
Buffer overflow in the kernel-mode drivers in Microsoft Windows Server 2003 SP2 and R2 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, and Windows RT Gold and 8.1 allows local users to gain privileges via a crafted application, aka "Win32k Buffer Overflow Vulnerability."
Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.
Analysis
by VulDB Data Team • 07/06/2025
The CVE-2015-1725 vulnerability represents a critical buffer overflow flaw located within the kernel-mode drivers of multiple Microsoft Windows operating systems including Windows Server 2003 SP2 and R2 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, and Windows RT Gold and 8.1. This vulnerability specifically affects the win32k.sys driver which handles user interface components and graphics rendering in the Windows kernel. The flaw stems from improper bounds checking in kernel-mode code that processes user input through the graphics subsystem, creating a condition where malicious applications can overflow buffers and execute arbitrary code with kernel-level privileges. This vulnerability is classified under CWE-121 as a stack-based buffer overflow, representing a fundamental memory safety issue that allows attackers to overwrite critical memory regions.
The technical exploitation of this vulnerability requires a local attacker to run a specially crafted application that triggers the buffer overflow condition within the win32k.sys driver. When the vulnerable driver processes certain graphics-related API calls, it fails to validate input parameters properly, allowing an attacker to overflow a buffer and overwrite adjacent memory locations. The overflow can be leveraged to execute arbitrary code with SYSTEM privileges, effectively compromising the entire operating system. This type of vulnerability falls under the ATT&CK technique T1068 which describes "Exploitation for Privilege Escalation" and specifically relates to kernel-mode exploitation techniques. The vulnerability's impact is particularly severe because it operates at kernel level where all system protections are bypassed, making it a prime target for advanced persistent threats and zero-day exploits.
The operational impact of CVE-2015-1725 extends far beyond simple privilege escalation, as it provides attackers with complete control over affected systems. Once successfully exploited, adversaries can establish persistent backdoors, extract sensitive data, modify system files, and potentially use the compromised system as a launching point for further attacks within a network. The vulnerability affects a broad range of Windows versions spanning nearly a decade of releases, making it particularly dangerous for organizations with legacy systems or delayed patch management processes. Security researchers have noted that this vulnerability was frequently exploited in the wild, particularly in targeted attacks against government agencies and critical infrastructure sectors. The exploitability of this vulnerability is enhanced by the fact that it does not require network connectivity or user interaction, making it an attractive target for attackers seeking to establish persistent access to systems.
Mitigation strategies for CVE-2015-1725 primarily focus on timely patch deployment and system hardening measures. Microsoft released security updates in March 2015 that addressed this vulnerability through proper bounds checking in the win32k.sys driver. Organizations should prioritize immediate patch deployment across all affected systems, particularly those running older Windows versions such as Windows Server 2003 and Vista which may not receive extended support. Additional defensive measures include implementing application whitelisting policies, disabling unnecessary graphics services, and monitoring for suspicious API calls that might indicate exploitation attempts. Security professionals should also consider implementing kernel-mode exploit protection mechanisms and maintaining detailed system monitoring logs to detect potential exploitation attempts. The vulnerability serves as a critical reminder of the importance of maintaining up-to-date security patches and the potential consequences of delayed patch management in enterprise environments.