The vulnerability was discovered by Sergey Golovanov from Kaspersky Lab. The vulnerability was exploited by Stuxnet.
Vulnerable component: Windows
CVSSv3 score: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:F/RL:O/RC:C
CWE-ID: CWE-129 - Improper Validation of Array Index
The vulnerability allows a local user to execute arbitrary code with elevated privileges.
The vulnerability exists due to an error in Win32k.sys driver when handling keyboard layouts as the Windows kernel fails to validate that an array index is within the bounds of the array. A local user can load a specially crafted keyboard layout and execute arbitrary code on the target system with privileges of SYSTEM account.
Successful exploitation of this vulnerability may allow an attacker to escalate privileges on vulnerable system.Note: this vulnerability is being actively exploited by Stuxnet.
- Microsoft Win32k - Keyboard Layout (MS10-073) [Exploit-DB]