var-202011-0845
Vulnerability from variot
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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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.