Attacker Value
Very High
1
PolarBear
1
CVE ID
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Attacker Value
Very High
(1 user assessed)
Exploitability
Moderate
(1 user assessed)User Interaction
Unknown
Privileges Required
Unknown
Attack Vector
Unknown
1
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Initial Access
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Description
This is a local priv-esc 0-day, so there is no patch. It uses a taskmanager file to provide escalated privileges.
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2
Ratings
-
Attacker ValueVery High
-
ExploitabilityMedium
Technical Analysis
This is a local priv-esc 0-day, so there is no patch. It uses a taskmanager file to provide escalated privileges.
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Offensive Application
exploit
Utility Class
privesc
Ports
Unknown
OS
WIndows 10
Vulnerable Versions
All (0-day)
Prerequisites
Unknown
Discovered By
SandboxEscaper
Metasploit Module
Unknown
Reporter
Unknown
Exploited in the Wild
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AttackerKB Worker indicated source as
Government or Industry Alert (https://www.cisa.gov/known-exploited-vulnerabilities-catalog)
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Additional Info
Authenticated
Unknown
Exploitable
Always
Reliability
Very Strong
Stability
Very Strong
Available Mitigations
Weak
Shelf Life
Medium
Userbase/Installbase
Very Large
Patch Effectiveness
Unknown
Rapid7
Technical Analysis
Report as Emergent Threat Response
Report as Exploited in the Wild
CVE ID
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Now that this has been out and published a bit moe, we know that the bug here is that when an attacker uses the legacy task scheduler, the legacy task scheduler fails to impersonate the permissions of the user (as expected) and instead, simply runs it as itself- a local administrator. There’s a great writeput about it here: https://blog.0patch.com/2019/06/another-task-scheduler-0day-another.html
The TL;DR is that by invoking the legacy task scheduler on Windows 10 <= 1903 in the proper manner as an authenticated user, they can gain execution in the context of the scheduler itself (local administrator).