Win32k Elevation of Privilege Vulnerability
CVE-2019-0803 is a local elevation-of-privilege vulnerability in the Windows Win32k component caused by improper handling of objects in memory. Microsoft describes it as occurring when Win32k fails to properly handle objects in memory, leading to the Win32k Elevation of Privilege Vulnerability. Successful exploitation allows an attacker who already has code execution on a target Windows system to elevate privileges locally. The provided content also notes observed in-the-wild exploitation, including use by Tonto Team and a 2019 SLUB loader associated with Operation Earth Kitsune/APT37 reporting.
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Impact, mitigation & remediation
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
Impact
What an attacker gets, and what they’ve been doing with it.
Mitigation
If you can’t patch tonight, do this now.
Remediation
Patch, then assume compromise.
Exploits
2 valid exploits after Mallory filtered fakes, detection scripts, and README-only repos (1 hidden).
This repository is a proof-of-concept (PoC) exploit for CVE-2019-0803, a Win32k Elevation of Privilege vulnerability affecting Microsoft Windows 7 SP1. The structure consists of a Visual Studio solution with project files and a header file (struct.h) that defines various Windows internal structures and constants used in the exploit. The README indicates the exploit's purpose is to steal a security token, allowing local privilege escalation. The exploit must be compiled and run locally on a vulnerable Windows 7 SP1 system. No network or remote attack vector is present; the attack is purely local. The repository references a related exploit for CVE-2016-7255 for further context. The main exploit logic is likely implemented in the (not provided) main.cpp and DDE.cpp files, with struct.h providing necessary data structures for interacting with Windows internals.
This repository is a proof-of-concept (PoC) exploit for CVE-2019-0803, a Win32k Elevation of Privilege vulnerability affecting Microsoft Windows 7 SP1. The exploit is implemented as a Visual Studio C++ project, with the main code files (such as main.cpp, DDE.cpp, and struct.h) located under win7sp1/poc_test/. The struct.h file defines various Windows kernel structures and constants used for the exploit, including those related to window management and process tokens. The README.md provides a brief description, a screenshot link, and a reference to a related exploit (CVE-2016-7255). The exploit's main capability is to locally escalate privileges by stealing a security token, allowing the attacker to gain elevated access on a vulnerable system. No network or remote attack vectors are present; the exploit must be run locally. The repository is structured as a standard Visual Studio project, and the exploit is at the proof-of-concept stage, requiring manual compilation and execution.
Affected products & vendors
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
Recent activity
5 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A specific vulnerability (CVE-2019-0803) referenced as being exploited by the SLUB loader in a 2019 campaign; the content does not provide technical details beyond noting exploitation and its use in the malware delivery chain.
Windows privilege escalation vulnerability exploited by Tonto Team.
Windows privilege escalation vulnerability exploited by Tonto Team.
Windows privilege escalation vulnerability exploited by Tonto Team.
The version that knows your environment.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.