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MitreCVE-2021-42143

HistoryJan 24, 2024 - 6:15 p.m.

CVE-2021-42143

2024-01-2418:15:08

CWE-835

mitre

web.nvd.nist.gov

contiki-ng

tinydtls

cve-2021-42143

security

denial of service

nvd

CVSS3

9.1

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

AI Score

Confidence

High

EPSS

0.001

Percentile

48.6%

JSON

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 configurations

Nvd

Node

contiki-ngtinydtlsRange≤2018-08-30

VendorProductVersionCPE
contiki-ngtinydtls*cpe:2.3:a:contiki-ng:tinydtls:*:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
contiki-ng	tinydtls	*	cpe:2.3:a:contiki-ng:tinydtls::::::::

References

seclists.org/fulldisclosure/2024/Jan/16

CVSS3

9.1

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

AI Score

Confidence

High

EPSS

0.001

Percentile

48.6%

JSON

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