Vulnerability in Schneider-Electric Modicon M241
CVE-2017-6026
A Use of Insufficiently Random Values issue was discovered in Schneider Electric Modicon PLCs Modicon M241, firmware versions prior to Version 4.0.5.11, and Modicon M251, firmware versions prior to Version 4.0.5.11. The session numbers generated by the web application are lacking randomization and are shared between several users. This may allow a current session to be compromised.
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: 0.318 (98.3th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 98th percentile — 98.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.318 · newest: 0.318 · change: 0.000
Affected products
- Schneider-Electric Modicon M241
- Schneider-Electric Modicon M241 Firmware
- Schneider-Electric Modicon M251
- Schneider-Electric Modicon M251 Firmware
- Schneider Electric Modicon Plcs — versions Schneider Electric Modicon PLCs
Weakness classification (CWE)
Public proof-of-concept exploits
References
- ics-cert.us-cert.gov/advisories/ICSA-17-089-02 (US Government Resource, Third Party Advisory)
- www.securityfocus.com/bid/97254 (VDB Entry, Third Party Advisory, vdb-entry)
- www.exploit-db.com/exploits/45918/ (Exploit, VDB Entry, Third Party Advisory, exploit)
Frequently asked questions
- What is CVE-2017-6026?
- CVE-2017-6026 is a critical-severity vulnerability in Schneider-Electric Modicon M241, classified under Use of Insufficiently Random Values. CVSS score: 9.1/10. Published 2017-06-30.
- How severe is CVE-2017-6026?
- Critical severity. CVSS v3 base score is 9.1 out of 10.
- Is CVE-2017-6026 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.