Resource exhaustion in Contiki-Ng Tinydtls
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.010 (61.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 61st percentile — 61.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000
Affected products
Weakness classification (CWE)
References
- github.com/contiki-ng/tinydtls/issues/24 (Patch, Issue Tracking)
- seclists.org/fulldisclosure/2024/Jan/15 (Mailing List, Third Party Advisory)
- af854a3a-2127-422b-91ae-364da2661108
Frequently asked questions
- What is CVE-2021-42142?
- CVE-2021-42142 is a critical-severity vulnerability in Contiki-Ng Tinydtls, classified under Improper Handling of Exceptional Conditions. CVSS score: 9.8/10. Published 2024-01-23.
- How severe is CVE-2021-42142?
- Critical severity. CVSS v3 base score is 9.8 out of 10.