Vulnerabilities > CVE-2021-40523 - Improper Check for Unusual or Exceptional Conditions vulnerability in Contiki-Os Contiki 3.0
Attack vector
NETWORK Attack complexity
LOW Privileges required
NONE Confidentiality impact
NONE Integrity impact
NONE Availability impact
HIGH Summary
In Contiki 3.0, Telnet option negotiation is mishandled. During negotiation between a server and a client, the server may fail to give the WILL/WONT or DO/DONT response for DO and WILL commands because of improper handling of exception condition, which leads to property violations and denial of service. Specifically, a server sometimes sends no response, because a fixed buffer space is available for all responses and that space may have been exhausted.
Vulnerable Configurations
| Part | Description | Count |
|---|---|---|
| OS | 1 |