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CVE-2018-7242: Vulnerable hash algorithms exists in Schneider Electric's Modicon Premium, Modicon Quantum, Modicon M340…

CVE-2018-7242 is rated critical with a CVSS v3.0 base score of 9.8 and NVD lists 57 affected products, including Schneider Electric Bmxnor0200 Firmware. Per its scoring, it can be exploited over the network, without authentication, without any user interaction. The scored impact on confidentiality, integrity and availability is the highest available.

Vulnerability description

Vulnerable hash algorithms exists in Schneider Electric's Modicon Premium, Modicon Quantum, Modicon M340, and BMXNOR0200 controllers in all versions of the communication modules. The algorithm used to encrypt the password is vulnerable to hash collision attacks.

Severity breakdown

CVSS v3.0 9.8: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

  • Attack vector: Network. Exploitable remotely over the network, with no need for local or physical access.
  • Attack complexity: Low. No special conditions; the attack can be repeated reliably.
  • Privileges required: None. No account or prior access is needed.
  • User interaction: None. No action from any user is needed.
  • Scope: Unchanged. Impact stays within the vulnerable component.
  • Confidentiality impact: High. Total loss of confidentiality; sensitive data can be fully disclosed.
  • Integrity impact: High. Total loss of integrity; data or system state can be fully modified.
  • Availability impact: High. Total loss of availability; the component can be shut down.

Underlying weakness

CWE-326: Inadequate Encryption Strength

The product stores or transmits sensitive data using an encryption scheme that is theoretically sound, but is not strong enough for the level of protection required.

Affected products

  • Schneider Electric Bmxnor0200 Firmware: all versions listed by NVD
  • Schneider Electric Bmxnor0200h Firmware: all versions listed by NVD
  • Schneider Electric 140cpu65150 Firmware: all versions listed by NVD
  • Schneider Electric 140cpu31110 Firmware: all versions listed by NVD
  • Schneider Electric 140cpu43412u Firmware: all versions listed by NVD
  • Schneider Electric 140cpu65160 Firmware: all versions listed by NVD
  • Schneider Electric 140cpu65260 Firmware: all versions listed by NVD
  • Schneider Electric 140cpu65860 Firmware: all versions listed by NVD
  • Schneider Electric 140cpu65160s Firmware: all versions listed by NVD
  • Schneider Electric 140cpu65150c Firmware: all versions listed by NVD
  • Schneider Electric 140cpu31110c Firmware: all versions listed by NVD
  • Schneider Electric 140cpu43412uc Firmware: all versions listed by NVD
  • Schneider Electric 140cpu65160c Firmware: all versions listed by NVD
  • Schneider Electric 140cpu65260c Firmware: all versions listed by NVD
  • Schneider Electric 140cpu65860c Firmware: all versions listed by NVD

References