Microsoft has released the April 2019 Patch Tuesday updates that address 74 vulnerabilities, including two Windows zero-days under active attack.
April 2019 Patch Tuesday security updates resolve over a dozen critical remote code execution and privilege escalation vulnerabilities affecting Windows and Microsoft browsers.
Both vulnerabilities tied the way the Win32k component in Windows handles objects in memory, an authenticated attacker could exploit them authenticated to execute arbitrary code in kernel mode.
“An elevation of privilege vulnerability exists in Windows when the Win32k component fails to properly handle objects in memory. An attacker who successfully exploited this vulnerability could run arbitrary code in kernel mode. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.” reads the security advisor for the CVE-2019-0803 that is equal to the one for the CVE-2019-0859 flaw.
“To exploit this vulnerability, an attacker would first have to log on to the system. An attacker could then run a specially crafted application that could exploit the vulnerability and take control of an affected system.
The update addresses this vulnerability by correcting how Win32k handles objects in memory.”
Microsoft did not reveal details about the vulnerabilities and the way threat actors have exploited them.
Adobe also released its Patch Tuesday updates for April 2019 that address a total of 43 vulnerabilities affecting the eight products of the company.