by Kastro
Paper/Archive/CVE-2021-42143

CVE-2021-42143

mitre — An issue was discovered in Contiki-NG tinyDTLS through master branch 53a0d97.

EPSS 0.8%CVSS 9.1
critical.is priorityof 100
39
CVSS 9.1 (ADP, NVD agree)9.1 / 10 × 3027.3Not in CISA KEV+300.0EPSS percentile 57.0.570 × 2011.4No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

An issue was discovered in Contiki-NG tinyDTLS through master branch 53a0d97. An infinite loop bug exists during the handling of a ClientHello handshake message. This bug allows remote attackers to cause a denial of service by sending a malformed ClientHello handshake message with an odd length of cipher suites, which triggers an infinite loop (consuming all resources) and a buffer over-read that can disclose sensitive information.

Affected

ProductAffectedFixed inSource
n/an/a–CNA

Scores by source

CISA ADP9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
NVD9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: partial

References

refseclists.org/fulldisclosure/2024/Jan/16refseclists.org/fulldisclosure/2024/Jan/16