VAR-202011-1295
Vulnerability from variot - Updated: 2022-05-04 09:15A CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') vulnerability exists in PLC Simulator on EcoStruxureª Control Expert (now Unity Pro) (all versions) that could cause a crash of the PLC simulator present in EcoStruxureª Control Expert software when receiving a specially crafted request over Modbus. 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
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Sightings
| Author | Source | Type | Date |
|---|
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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