Vulnerabilities > CVE-2018-7843 - Out-of-bounds Read vulnerability in Schneider-Electric products
Attack vector
NETWORK Attack complexity
LOW Privileges required
NONE Confidentiality impact
NONE Integrity impact
NONE Availability impact
PARTIAL Summary
A CWE-248: Uncaught Exception vulnerability exists in all versions of the Modicon M580, Modicon M340, Modicon Quantum, and Modicon Premium which could cause denial of service when reading memory blocks with an invalid data size or with an invalid data offset in the controller over Modbus.
Vulnerable Configurations
| Part | Description | Count |
|---|---|---|
| OS | 4 | |
| Hardware | 4 |
Common Weakness Enumeration (CWE)
Common Attack Pattern Enumeration and Classification (CAPEC)
- Overread Buffers An adversary attacks a target by providing input that causes an application to read beyond the boundary of a defined buffer. This typically occurs when a value influencing where to start or stop reading is set to reflect positions outside of the valid memory location of the buffer. This type of attack may result in exposure of sensitive information, a system crash, or arbitrary code execution.
Talos
| id | TALOS-2018-0738 |
| last seen | 2019-06-10 |
| published | 2019-06-10 |
| reporter | Talos Intelligence |
| source | http://www.talosintelligence.com/vulnerability_reports/TALOS-2018-0738 |
| title | Schneider Electric Modicon M580 UMAS memory block read denial-of-service vulnerability |