Security Flaw in Eclipse Californium Affecting DTLS Handshake Verification
CVE-2021-34433

7.5HIGH

Key Information:

Vendor

The Eclipse Foundation

Status
Eclipse Californium
Vendor
CVE Published:
20 August 2021

What is CVE-2021-34433?

In specific versions of Eclipse Californium, DTLS handshakes can erroneously succeed without verifying the server's signature on the client side. This occurs if the signature is not included in the server's ServerKeyExchange message, potentially leading to security breaches where malicious servers may impersonate legitimate ones. Proper validation is crucial to ensure secure communications.

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Affected Version(s)

Eclipse Californium 2.0.0

Eclipse Californium <= 2.6.4

Eclipse Californium 3.0.0-M1

References

https://bugs.eclipse.org/bugs/show_bug.cgi?id=575281
x_refsource_CONFIRM

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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