CVE-2017-8680 in Windows
Summary
by MITRE
The Windows kernel component on Microsoft Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8.1, Windows Server 2012 Gold and R2, and Windows RT 8.1 allows an information disclosure vulnerability when it improperly handles objects in memory, aka "Win32k Information Disclosure Vulnerability". This CVE ID is unique from CVE-2017-8678, CVE-2017-8677, CVE-2017-8681, and CVE-2017-8687.
VulDB is the best source for vulnerability data and more expert information about this specific topic.
Analysis
by VulDB Data Team • 06/15/2024
The Windows kernel component vulnerability identified as CVE-2017-8680 represents a critical information disclosure flaw within the win32k.sys driver that governs graphical user interface operations in Microsoft Windows operating systems. This vulnerability specifically affects Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8.1, Windows Server 2012 Gold and R2, and Windows RT 8.1 systems. The flaw resides in how the kernel handles objects in memory, creating an exploitable condition that could allow unauthorized access to sensitive system information.
The technical implementation of this vulnerability stems from improper memory handling within the win32k.sys driver which manages windowing system operations and graphical user interface components. When the kernel processes certain objects in memory, it fails to properly validate or sanitize the memory structures, leading to information disclosure through memory corruption mechanisms. This type of vulnerability falls under CWE-200, which specifically addresses information exposure, and represents a classic case of improper handling of memory objects that can be exploited by malicious actors to extract sensitive data from system memory. The vulnerability operates at the kernel level, making it particularly dangerous as it can potentially bypass user-mode protections and access privileged system information.
The operational impact of CVE-2017-8680 extends beyond simple information disclosure, as it can serve as a foundational vulnerability for more sophisticated attacks within the attack chain. An attacker who successfully exploits this vulnerability could potentially extract kernel memory contents, including sensitive data structures, credentials, or system configuration information that could be leveraged for privilege escalation or lateral movement within a network. This aligns with ATT&CK technique T1003, which covers OS credential dumping, and T1059, which covers command and scripting interpreter. The vulnerability's presence in multiple Windows versions makes it particularly concerning for enterprise environments where legacy systems remain operational, as it provides attackers with a consistent exploitation vector across various platform configurations.
Mitigation strategies for CVE-2017-8680 should prioritize immediate patch deployment through Microsoft's regular security updates, as the vulnerability affects systems that may not receive extended support. Organizations should implement network segmentation to limit potential exploitation paths and monitor for unusual memory access patterns or information disclosure attempts. Additional defensive measures include disabling unnecessary graphical services, implementing strict access controls for system memory operations, and maintaining comprehensive monitoring of kernel-level activities. Security teams should also consider implementing exploit prevention mechanisms such as data execution prevention and address space layout randomization to reduce the exploitability of similar memory corruption vulnerabilities. The vulnerability's classification as a kernel-level information disclosure also necessitates thorough incident response planning and forensic readiness to detect potential exploitation attempts that may not immediately manifest as obvious system failures.