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.
Advisories
Source ID Title
EUVD EUVD EUVD-2021-27699 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.
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

No history.

cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2024-08-04T02:44:10.790Z

Reserved: 2021-09-05T00:00:00

Link: CVE-2021-40523

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2021-09-05T19:15:15.030

Modified: 2024-11-21T06:24:18.947

Link: CVE-2021-40523

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.