CVE-2021-42147
Contiki-NG tinyDTLS Buffer Over-Read / Denial of Service
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
Buffer over-read vulnerability in the dtls_sha256_update function in Contiki-NG tinyDTLS through master branch 53a0d97 allows remote attackers to cause a denial of service via crafted data packet.
Vulnerabilidad de lectura excesiva del búfer en la función dtls_sha256_update en Contiki-NG tinyDTLS a través de la rama maestra 53a0d97 permite a atacantes remotos provocar una denegación de servicio a través de un paquete de datos manipulado.
An issue was discovered in Contiki-NG tinyDTLS versions through 2018-08-30. A buffer over-read exists in the dtls_sha256_update function. This bug allows remote attackers to cause a denial of service (crash) and possibly read sensitive information by sending a malformed packet with an over-large fragment length field, due to servers incorrectly handling malformed packets.
CVSS Scores
SSVC
- Decision:-
Timeline
- 2021-10-11 CVE Reserved
- 2024-01-18 CVE Published
- 2024-08-04 CVE Updated
- 2025-03-30 EPSS Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-125: Out-of-bounds Read
CAPEC
References (1)
| URL | Tag | Source |
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| https://seclists.org/fulldisclosure/2024/Jan/20 | Mailing List |
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Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Contiki-ng Search vendor "Contiki-ng" | Tinydtls Search vendor "Contiki-ng" for product "Tinydtls" | 2018-08-30 Search vendor "Contiki-ng" for product "Tinydtls" and version "2018-08-30" | - |
Affected
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