An elevation of privilege vulnerability exists when the Windows Application Compatibility Client Library improperly handles registry operations. An attacker who successfully exploited this vulnerability could gain elevated privileges. To exploit the vulnerability, an attacker would first need code execution on a victim system. An attacker could then run a specially crafted application. The security update addresses the vulnerability by ensuring the Windows Application Compatibility Client Library properly handles registry operations.
Tao Yan (<a href="https://twitter.com/Ga1ois">@Ga1ois</a>), Ken Hsu, and Qi Deng from Palo Alto Networks , Yuki Chen