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Critical severity · published Jun 30, 2017
CVE-2017-6028
An Insufficiently Protected Credentials issue was discovered in Schneider Electric Modicon PLCs Modicon M241, all firmware versions, and Modicon M251, all firmware versions
9.8
CVSS
2.2%
EPSS
No
On KEV
Description
An Insufficiently Protected Credentials issue was discovered in Schneider Electric Modicon PLCs Modicon M241, all firmware versions, and Modicon M251, all firmware versions. Log-in credentials are sent over the network with Base64 encoding leaving them susceptible to sniffing. Sniffed credentials could then be used to log into the web application.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)2.2% · higher than 83% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MM
Modicon M241 Firmware · Schneider-electric
through 4.0.3.20 · source: NVD
MM
Modicon M251 Firmware · Schneider-electric
through 4.0.3.20 · source: NVD
Affected product
MM
Modicon M241 Firmware
Schneider-electric
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2017-6028
CVE.org
https://www.cve.org/CVERecord?id=CVE-2017-6028
Third Party Advisory
http://www.securityfocus.com/bid/97254
Third Party Advisory
https://ics-cert.us-cert.gov/advisories/ICSA-17-089-02
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