CVE-2021-42142

CriticalCVSS 9.8/10Last modified Jun 17, 2026

Description

An issue was discovered in Contiki-NG tinyDTLS through master branch 53a0d97. DTLS servers mishandle the early use of a large epoch number. This vulnerability allows remote attackers to cause a denial of service and false-positive packet drops.

Metrics

CVSS 3.1 9.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-755 CWE-770

Affected software

Vendor	Product	Versions
n/a	n/a	n/a

References

https://github.com/contiki-ng/tinydtls/issues/24Issue Tracking, Patch
https://seclists.org/fulldisclosure/2024/Jan/15Mailing List, Third Party Advisory
http://seclists.org/fulldisclosure/2024/Jan/15
https://github.com/contiki-ng/tinydtls/issues/24Issue Tracking, Patch
https://seclists.org/fulldisclosure/2024/Jan/15Mailing List, Third Party Advisory

Timeline

Published: Jan 23, 2024
Last modified: Jun 17, 2026
NVD status: Modified

Related CVEs from 2021

CVE-2021-421439.1An issue was discovered in Contiki-NG tinyDTLS through master branch 53a0d97. An infinite loop bug exists during the handling of a ClientHel CVE-2021-421449.8Buffer over-read vulnerability in Contiki-NG tinyDTLS through master branch 53a0d97 allows attackers obtain sensitive information via crafte CVE-2021-421457.5An assertion failure discovered in in check_certificate_request() in Contiki-NG tinyDTLS through master branch 53a0d97 allows attackers to c CVE-2021-421467.5An issue was discovered in Contiki-NG tinyDTLS through master branch 53a0d97. DTLS servers allow remote attackers to reuse the same epoch nu CVE-2021-421479.1Buffer over-read vulnerability in the dtls_sha256_update function in Contiki-NG tinyDTLS through master branch 53a0d97 allows remote attacke CVE-2021-42165.5A Floating point exception (division-by-zero) flaw was found in Mupdf for zero width pages in muraster.c. It is fixed in Mupdf-1.20.0-rc1 up CVE-2021-421658.8MitraStar GPT-2541GNAC-N1 (HGU) 100VNZ0b33 devices allow remote authenticated users to obtain root access by executing command "deviceinfo s CVE-2021-421686.1Cross Site Scripting (XSS) in Sourcecodester Try My Recipe (Recipe Sharing Website - CMS) by oretnom23, allows attackers to gain the PHPSESI CVE-2021-421699.8The Simple Payroll System with Dynamic Tax Bracket in PHP using SQLite Free Source Code (by: oretnom23 ) is vulnerable from remote SQL-Injec CVE-2021-42173.3A flaw was found in unzip. The vulnerability occurs due to improper handling of Unicode strings, which can lead to a null pointer dereferenc CVE-2021-421717.2Zenario CMS 9.0.54156 is vulnerable to File Upload. The web server can be compromised by uploading and executing a web-shell which can run c CVE-2021-42185.5A flaw was found in the Linux kernel’s implementation of reading the SVC RDMA counters. Reading the counter sysctl panics the system. This f