Vulnerability in Canon Pixma Tr150
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).
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.010 (60.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 61st percentile — 60.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- defcon.org/html/defcon-29/dc-29-speakers.html (Third Party Advisory)
- packetstormsecurity.com/files/163795/Canon-TR150-Driver-3.71.2.10-Privilege-Esc… (Exploit, VDB Entry, Third Party Advisory)
- raw.githubusercontent.com/jacob-baines/vuln_disclosure/main/vuln_2021_03.txt (Third Party Advisory)
- www.youtube.com/watch (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-38085?
- CVE-2021-38085 is a high-severity vulnerability in Canon Pixma Tr150, classified under Incorrect Permission Assignment for Critical Resource. CVSS score: 7.8/10. Published 2021-08-11.
- How severe is CVE-2021-38085?
- High severity. CVSS v3 base score is 7.8 out of 10.
- Is CVE-2021-38085 known to be exploited?
- 6 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.