// For flags

CVE-2021-42144

Contiki-NG tinyDTLS dtls_ccm_decrypt_message() Buffer Overread

Severity Score

9.8
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

Buffer over-read vulnerability in Contiki-NG tinyDTLS through master branch 53a0d97 allows attackers obtain sensitive information via crafted input to dtls_ccm_decrypt_message().

Vulnerabilidad de lectura excesiva del búfer en Contiki-NG tinyDTLS a través de la rama maestra 53a0d97 permite a los atacantes obtener información confidencial a través de entradas manipuladas en dtls_ccm_decrypt_message().

An issue was discovered in Contiki-NG tinyDTLS versions through 2018-08-30. Incorrect handling of over-large packets in dtls_ccm_decrypt_message() causes a buffer over-read that can expose sensitive information.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Network
Attack Complexity
Low
Authentication
None
Confidentiality
Complete
Integrity
Complete
Availability
Complete
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2021-10-11 CVE Reserved
  • 2024-01-18 CVE Published
  • 2024-08-04 CVE Updated
  • 2025-03-30 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-125: Out-of-bounds Read
CAPEC
References (1)
URL Tag Source
https://seclists.org/fulldisclosure/2024/Jan/17 Mailing List
URL Date SRC
URL Date SRC
URL Date SRC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Contiki-ng
Search vendor "Contiki-ng"
 Contiki-ng Tinydtls
Search vendor "Contiki-ng" for product "Contiki-ng Tinydtls"
 <= 2018-08-30
Search vendor "Contiki-ng" for product "Contiki-ng Tinydtls" and version " <= 2018-08-30"
-
Affected