Vulnerability Details : CVE-2021-34433
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.
Products affected by CVE-2021-34433
- cpe:2.3:a:eclipse:californium:*:*:*:*:*:*:*:*
- cpe:2.3:a:eclipse:californium:3.0.0:m1:*:*:*:*:*:*
- cpe:2.3:a:eclipse:californium:3.0.0:m2:*:*:*:*:*:*
- cpe:2.3:a:eclipse:californium:3.0.0:m3:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-34433
0.08%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 32 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-34433
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
5.0
|
MEDIUM | AV:N/AC:L/Au:N/C:N/I:P/A:N |
10.0
|
2.9
|
NIST | |
|
7.5
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
3.9
|
3.6
|
NIST |
CWE ids for CVE-2021-34433
-
The product performs a key exchange with an actor without verifying the identity of that actor.Assigned by: emo@eclipse.org (Secondary)
-
The product does not verify, or incorrectly verifies, the cryptographic signature for data.Assigned by: nvd@nist.gov (Primary)
References for CVE-2021-34433
-
https://bugs.eclipse.org/bugs/show_bug.cgi?id=575281
575281 – (CVE-2021-34433) 2.0 - 2.6 : DTLS vulnerability not verifying the server certificate, when ServerKeyExchange is not signedIssue Tracking;Vendor Advisory
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