CVE-2021-38085

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).

CVSS v3.1 NVD

7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v2.0 NVD

7.2 HIGHAV:L/AC:L/Au:N/C:C/I:C/A:C

EPSS

0.98% chance of exploitation in the next 30 days, 62nd percentile

Published

2021-08-11

Updated

2024-08-04

Proof-of-concept exploits (2)

• http://packetstormsecurity.com/files/163795/Canon-TR150-Driver-3.71.2.10-Privilege-Escala…
• https://www.youtube.com/watch?v=vdesswZYz-8

Metasploit modules (1)

• rapid7/metasploit-framework/blob/master/modules/exploits/windows/local/canon_driver_prive…

Security advisories

• https://defcon.org/html/defcon-29/dc-29-speakers.html#baines
• https://raw.githubusercontent.com/jacob-baines/vuln_disclosure/main/vuln_2021_03.txt

References

• CVE Record
• NVD entry