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CVE-2021-34433

Good to know:

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Date: August 20, 2021

In Eclipse Californium version 2.0.0 to 2.6.4 and 3.0.0-M1 to 3.0.0-M3, the certificate based (x509 and RPK) DTLS handshakes accidentally succeeds without verifying the server side's signature on the client side, if that signature is not included in the server's ServerKeyExchange.

Language: Java

Severity Score

Related Resources (3)

https://bugs.eclipse.org/bugs/show_bug.cgi?id=575281
https://nvd.nist.gov/vuln/detail/CVE-2021-34433
https://www.mend.io/vulnerability-database/CVE-2021-34433

Severity Score

Weakness Type (CWE)

Improper Verification of Cryptographic Signature

CWE-347

Top Fix

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Upgrade to version org.eclipse.californium:scandium:2.6.5,3.0.0-M4

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CVSS v3

Base Score:
Attack Vector (AV):
Attack Complexity (AC):
Privileges Required (PR):
User Interaction (UI):
Scope (S):
Confidentiality (C): PARTIAL
Integrity (I): PARTIAL
Availability (A): PARTIAL

CVSS v2

Base Score:
Access Vector (AV):
Access Complexity (AC):
Authentication (AU):
Confidentiality (C): LOW
Integrity (I): LOW
Availability (A): NONE
Additional information:

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