VulnerabilityModified
CVE-2021-42141
One incorrect handshake could complete with different epoch numbers in the packets Client_Hello, Client_key_exchange, and Change_cipher_spec, which may cause denial of service.
CRITICAL 9.8EPSS 1.18%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.18%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
An issue was discovered in Contiki-NG tinyDTLS through 2018-08-30. One incorrect handshake could complete with different epoch numbers in the packets Client_Hello, Client_key_exchange, and Change_cipher_spec, which may cause denial of service.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 1.18% probability · 66th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-755
- Affected
- contiki-ng/tinydtls
- Source
- cve@mitre.org
References
- http://packetstormsecurity.com/files/176625/Contiki-NG-tinyDTLS-Denial-Of-Service.htmlThird Party Advisory, VDB Entry
- https://github.com/contiki-ng/tinydtls/issues/27Patch
- https://seclists.org/fulldisclosure/2024/Jan/14Mailing List, Third Party Advisory
- http://packetstormsecurity.com/files/176625/Contiki-NG-tinyDTLS-Denial-Of-Service.htmlThird Party Advisory, VDB Entry
- http://seclists.org/fulldisclosure/2024/Jan/14
- https://github.com/contiki-ng/tinydtls/issues/27Patch
- https://seclists.org/fulldisclosure/2024/Jan/14Mailing List, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.