CVE-2021-42147 is a critical buffer over-read vulnerability in the dtls_sha256_update function within Contiki-NG tinyDTLS (up to master branch 53a0d97). This flaw allows remote attackers to trigger a denial of service by sending specially crafted data packets. With a CVSS score of 9.1 (CRITICAL), it presents a low-complexity attack vector that requires no user interaction and can lead to high impact on availability. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this vulnerability.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
2018-08-30CPE matchmatch criteria | cpe:2.3:a:contiki-ng:tinydtls:2018-08-30:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.