High severity · published Dec 11, 2020
CVE-2020-7539
A CWE-754 Improper Check for Unusual or Exceptional Conditions vulnerability exists in the Web Server on Modicon M340, Legacy Offers Modicon Quantum and Modicon Premium and…
7.5
CVSS
1.2%
EPSS
No
On KEV
Description
A CWE-754 Improper Check for Unusual or Exceptional Conditions vulnerability exists in the Web Server on Modicon M340, Legacy Offers Modicon Quantum and Modicon Premium and associated Communication Modules (see security notification for affected versions), that could cause a denial of service vulnerability when a specially crafted packet is sent to the controller over HTTP.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.2% · higher than 68% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
1F
140cpu65150 Firmware · Schneider-electric
before 6.1 · source: NVD
1F
140noc77101 Firmware · Schneider-electric
before 1.08 · source: NVD
1F
140noc78000 Firmware · Schneider-electric
before 1.74 · source: NVD
1F
140noc78100 Firmware · Schneider-electric
before 1.74 · source: NVD
1F
140noe77111 Firmware · Schneider-electric
before 7.1 · source: NVD
BF
Bmxnoc0401 Firmware · Schneider-electric
before 2.10 · source: NVD
BF
Bmxnoe0100 Firmware · Schneider-electric
before 3.3 · source: NVD
BF
Bmxnoe0110 Firmware · Schneider-electric
before 6.5 · source: NVD
MM
Modicon M340 Bmxp341000 Firmware · Schneider-electric
before 3.30 · source: NVD
MM
Modicon M340 Bmxp342000 Firmware · Schneider-electric
before 3.30 · source: NVD
MM
Modicon M340 Bmxp3420102 Firmware · Schneider-electric
before 3.30 · source: NVD
MM
Modicon M340 Bmxp3420102cl Firmware · Schneider-electric
before 3.30 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-7539
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-7539
Vendor Advisory
https://www.se.com/ww/en/download/document/SEVD-2020-343-03/
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