CVE-2021-38311 Information

Description

In Contiki 3.0 potential nonterminating acknowledgment loops exist in the Telnet service. When the negotiated options are already disabled servers still respond to DONT and WONT requests with WONT or DONT commands which may lead to infinite acknowledgment loops denial of service and excessive CPU consumption.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Reference

https://github.com/contiki-os/contiki/issues/2685

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

7.5