Vulnerability Details : CVE-2021-42142
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.
Vulnerability category: Denial of service
Products affected by CVE-2021-42142
- cpe:2.3:a:contiki-ng:tinydtls:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-42142
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-2021-42142
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
---|---|---|---|---|---|---|
9.8
|
CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
3.9
|
5.9
|
NIST | 2024-01-31 |
CWE ids for CVE-2021-42142
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The product does not handle or incorrectly handles an exceptional condition.Assigned by: nvd@nist.gov (Primary)
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The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor.Assigned by: 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary)
References for CVE-2021-42142
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https://seclists.org/fulldisclosure/2024/Jan/15
Full Disclosure: Mishandle epoch number in TinyDTLS serversMailing List;Third Party Advisory
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https://github.com/contiki-ng/tinydtls/issues/24
wrong packets drops · Issue #24 · contiki-ng/tinydtls · GitHubIssue Tracking;Patch
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