VAR-202011-0845

Vulnerability from variot - Updated: 2023-12-18 11:57

A CWE-863: Incorrect Authorization vulnerability exists in PLC Simulator on EcoStruxureª Control Expert (now Unity Pro) (all versions) that could cause bypass of authentication when overwriting memory using a debugger. PLC Simulator for EcoStruxure Control Expert and PLC Simulator for Unity Pro Is vulnerable to several vulnerabilities: ‥ * Buffer overflow (CWE-120) - CVE-2020-7559 ‥ * Improper checking in exceptional conditions of the program (CWE-754) - CVE-2020-7538 ‥ * Illegal authentication (CWE-863) - CVE-2020-28211 ‥ * Inappropriate restriction of excessive authentication attempts (CWE-307) - CVE-2020-28212 ‥ * Incomplete integrity verification of downloaded code (CWE-494) - CVE-2020-28213The expected impact depends on each vulnerability, but it may be affected as follows. ‥ * By a remote third party Modbus If you send a specially crafted request via EcoStruxure Control Expert of PLC Simulator Is crashed - CVE-2020-7559 , CVE-2020-7538 ‥ * Authentication is bypassed if the memory is overwritten by a local third party using the debugger - CVE-2020-28211 ‥ * By a remote third party Modbus Brute force attack via brute force executes unauthorized commands - CVE-2020-28212 ‥ * By a remote third party Modbus If a specially crafted request is sent via, an unauthorized command will be executed - CVE-2020-28213. Schneider Electric EcoStruxure Control Expert is a universal programming, debugging and operating software for Modicon M340, M580, M580S, Premium, Momentum and Quantum series. An attacker can use this vulnerability to bypass authentication by using a debugger to overwrite the memory

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    "data": "A CWE-863: Incorrect Authorization vulnerability exists in PLC Simulator on EcoStruxure\u00aa Control Expert (now Unity Pro) (all versions) that could cause bypass of authentication when overwriting memory using a debugger. PLC Simulator for EcoStruxure Control Expert and PLC Simulator for Unity Pro Is vulnerable to several vulnerabilities: \u2025 * Buffer overflow (CWE-120) - CVE-2020-7559 \u2025 * Improper checking in exceptional conditions of the program (CWE-754) - CVE-2020-7538 \u2025 * Illegal authentication (CWE-863) - CVE-2020-28211 \u2025 * Inappropriate restriction of excessive authentication attempts (CWE-307) - CVE-2020-28212 \u2025 * Incomplete integrity verification of downloaded code (CWE-494) - CVE-2020-28213The expected impact depends on each vulnerability, but it may be affected as follows. \u2025 * By a remote third party Modbus If you send a specially crafted request via EcoStruxure Control Expert of PLC Simulator Is crashed - CVE-2020-7559 , CVE-2020-7538 \u2025 * Authentication is bypassed if the memory is overwritten by a local third party using the debugger - CVE-2020-28211 \u2025 * By a remote third party Modbus Brute force attack via brute force executes unauthorized commands - CVE-2020-28212 \u2025 * By a remote third party Modbus If a specially crafted request is sent via, an unauthorized command will be executed - CVE-2020-28213. Schneider Electric EcoStruxure Control Expert is a universal programming, debugging and operating software for Modicon M340, M580, M580S, Premium, Momentum and Quantum series. An attacker can use this vulnerability to bypass authentication by using a debugger to overwrite the memory",
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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

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Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.


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