Vulnerability Monitor

The vendors, products, and vulnerabilities you care about

CVE-2021-42143

An issue was discovered in Contiki-NG tinyDTLS through master branch 53a0d97. An infinite loop bug exists during the handling of a ClientHello handshake message. This bug allows remote attackers to cause a denial of service by sending a malformed ClientHello handshake message with an odd length of cipher suites, which triggers an infinite loop (consuming all resources) and a buffer over-read that can disclose sensitive information.

Published

2024-01-24T18:15:08.080

Last Modified

2025-06-20T20:15:21.900

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 9.1 (CRITICAL)

Weaknesses
  • Type: Primary
    CWE-835
  • Type: Secondary
    CWE-835
Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Application contiki-ng tinydtls ≤ 2018-08-30 Yes
References