CVE Vulnerability

CVE-2021-40523

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.

5 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 10 / Impact : 2.9

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

Scope

7.5 /10

CVSS v3.0 : HIGH

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://github.com/contiki-os/contiki/issues/2686 Patch Third Party Advisory
Configurations

Configuration 1

cpe:2.3:o:contiki-os:contiki:3.0:*:*:*:*:*:*:*
Information

Published : 2021-09-05 07:15

Updated : 2021-09-10 07:50

NVD link : CVE-2021-40523

Mitre link : CVE-2021-40523

Products Affected
No products.
CWE
CWE-754