[Suggested description] An issue was discovered in Contiki-NG tinyDTLS 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.
[Vulnerability Type] Buffer Overflow [Vendor of Product] https://github.com/contiki-ng/tinydtls [Affected Product Code Base] contiki-ng tinydtls - master branch 53a0d97 [Affected Component] the service of dtls servers [Attack Type] Remote [Impact Code execution] true [Impact Denial of Service] true [Reference] https://github.com/contiki-ng/tinydtls/issues/21 [Discoverer] jerrytesting [CVE Reference] The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CVE-2021-42147 to this vulnerability. _______________________________________________ Sent through the Full Disclosure mailing list https://nmap.org/mailman/listinfo/fulldisclosure Web Archives & RSS: https://seclists.org/fulldisclosure/
