Vulnerability in Canon Imageprograf Firmware
CVE-2022-26320
The Rambus SafeZone Basic Crypto Module before 10.4.0, as used in certain Fujifilm (formerly Fuji Xerox) devices before 2022-03-01, Canon imagePROGRAF and imageRUNNER devices through 2022-03-14, and potentially many other devices, generates RSA keys that can be broken with Fermat's factorization method. This allows efficient calculation of private RSA keys from the public key of a TLS certificate.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.
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
- global.canon/en/support/security/index.html (Third Party Advisory)
- fermatattack.secvuln.info (Third Party Advisory)
- www.fujifilm.com/fbglobal/eng/company/news/notice/2022/0302_rsakey_announce.html (Third Party Advisory, Mitigation)
- www.rambus.com/security/response-center/advisories/rmbs-2021-01/
- web.archive.org/web/20220922042721/https://safezoneswupdate.com/
- af854a3a-2127-422b-91ae-364da2661108
Frequently asked questions
- What is CVE-2022-26320?
- CVE-2022-26320 is a critical-severity vulnerability in Canon Imageprograf Firmware, classified under Use of Insufficiently Random Values. CVSS score: 9.1/10. Published 2022-03-14.
- How severe is CVE-2022-26320?
- Critical severity. CVSS v3 base score is 9.1 out of 10.
- Is CVE-2022-26320 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.