Vulnerability Details : 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.
Vulnerability category: Denial of service
Products affected by CVE-2021-42143
- cpe:2.3:a:contiki-ng:tinydtls:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-42143
0.17%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 54 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-42143
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
---|---|---|---|---|---|---|
9.1
|
CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H |
3.9
|
5.2
|
NIST | 2024-01-31 |
CWE ids for CVE-2021-42143
-
The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop.Assigned by: nvd@nist.gov (Primary)
References for CVE-2021-42143
-
https://seclists.org/fulldisclosure/2024/Jan/16
Full Disclosure: Infinite loop leading to buffer overflow in TinyDTLSMailing List;Third Party Advisory
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