CVE-2020-27222

Description

In Eclipse Californium version 2.3.0 to 2.6.0, the certificate based (x509 and RPK) DTLS handshakes accidentally fails, because the DTLS server side sticks to a wrong internal state. That wrong internal state is set by a previous certificate based DTLS handshake failure with TLS parameter mismatch. The DTLS server side must be restarted to recover this. This allow clients to force a DoS.

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.23%
Vendor Advisory eclipse.org
Affected: The Eclipse Foundation Eclipse Californium
Published at:
Updated at:

References

Link Tags
https://bugs.eclipse.org/bugs/show_bug.cgi?id=570844 permissions required vendor advisory

Frequently Asked Questions

What is the severity of CVE-2020-27222?
CVE-2020-27222 has been scored as a high severity vulnerability.
How to fix CVE-2020-27222?
To fix CVE-2020-27222, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2020-27222 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2020-27222 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2020-27222?
CVE-2020-27222 affects The Eclipse Foundation Eclipse Californium.
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