What is the vulnerability ID for this issue?

The vulnerability ID for this issue is CVE-2021-34433.

What is the severity level of CVE-2021-34433?

The severity level of CVE-2021-34433 is high (7.5).

What software versions are affected by CVE-2021-34433?

Eclipse Californium version 2.0.0 to 2.6.4 and 3.0.0-M1 to 3.0.0-M3 are affected by CVE-2021-34433.

Are there any references or additional information about CVE-2021-34433?

Yes, you can find more information about CVE-2021-34433 at the following link: https://bugs.eclipse.org/bugs/show_bug.cgi?id=575281

Vulnerability/
CVE-2021-34433

high

7.5

CWE

347 322

20/8/2021

4/8/2024

CVE-2021-34433

Q: How does CVE-2021-34433 exploit the vulnerability?

CVE-2021-34433 allows certificate-based DTLS handshakes to succeed without verifying the server side's signature on the client side, if that signature is not included in the server's ServerKeyExchange.

First published: Fri Aug 20 2021(Updated: )

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.

Credit: emo@eclipse.org

Affected Software	Affected Version	How to fix
Eclipse Californium	>=2.0.0<2.6.5
Eclipse Californium	=3.0.0-m1
Eclipse Californium	=3.0.0-m2
Eclipse Californium	=3.0.0-m3

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Reference Links

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

Frequently Asked Questions

What is the vulnerability ID for this issue?
The vulnerability ID for this issue is CVE-2021-34433.
What is the severity level of CVE-2021-34433?
The severity level of CVE-2021-34433 is high (7.5).
What software versions are affected by CVE-2021-34433?
Eclipse Californium version 2.0.0 to 2.6.4 and 3.0.0-M1 to 3.0.0-M3 are affected by CVE-2021-34433.
How does CVE-2021-34433 exploit the vulnerability?
CVE-2021-34433 allows certificate-based DTLS handshakes to succeed without verifying the server side's signature on the client side, if that signature is not included in the server's ServerKeyExchange.
Are there any references or additional information about CVE-2021-34433?
Yes, you can find more information about CVE-2021-34433 at the following link: https://bugs.eclipse.org/bugs/show_bug.cgi?id=575281

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agent/author
agent/last-modified-date
agent/description
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agent/event
agent/source
vendor/eclipse
canonical/eclipse californium
version/eclipse californium/2.0.0
version/eclipse californium/3.0.0-m1
version/eclipse californium/3.0.0-m2
version/eclipse californium/3.0.0-m3

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