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VERT Threat Alert: June 2019 Patch Tuesday Analysis

Today’s VERT Alert addresses Microsoft’s June 2019 Security Updates. VERT is actively working on coverage for these vulnerabilities and expects to ship ASPL-835 on Wednesday, June 12th.

In-The-Wild & Disclosed CVEs

CVE-2019-1053

An issue where Windows Shell fails to properly validate folder shortcuts could lead to sandbox escape. The attacker would require the ability to execute code on the system to exploit this vulnerability. This appears to be the SandboxEscaper IE 11 Sandbox Escape documented by Bleeping Computer.

Microsoft has rated this as a 1 (Exploitation More Likely) on the Exploitability Index.

CVE-2019-1064

An attacker who is logged into a system could take advantage of a flaw in the Windows AppX Deployment Service (AppXSVC) to gain control of an impacted system. This flaw exists due to AppXSVC failing to properly handle hard links. This appears to be part of the SandboxEscaper zero-day releases documented by Bleeping Computer.

Microsoft has rated this as a 1 (Exploitation More Likely) on the Exploitability Index.

CVE-2019-1069

A file operation validation flaw in the Task Schedule Service can lead to elevated privileges on a system. This appears to be part of the SandboxEscaper zero-day releases documented by Bleeping Computer.

Microsoft has rated this as a 1 (Exploitation More Likely) on the Exploitability Index.

CVE-2019-0973

This vulnerability allows privilege escalation because the Windows Installer can insecurely load libraries due to a failure to properly sanitize input. Successful exploitation would lead to a full compromise of the system. This appears to be part of the SandboxEscaper zero-day releases documented by Bleeping Computer.

Microsoft has rated this as a 2 (Exploitation Less Likely) on the Exploitability Index.

CVE Breakdown by Tag

While historical Microsoft Security Bulletin groupings are gone, Microsoft vulnerabilities are tagged with an identifier. This list provides a breakdown of the CVEs on a per tag (Read more...)