CVE-2020-27222

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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
7.5 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
eclipseCNA
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CVEADP
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Base Score
CVSS 3.x
EPSS Score
Percentile: 45%
VendorProductVersion
eclipsecalifornium
2.3.0 ≤
𝑥
≤ 2.6.0
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://bugs.eclipse.org/bugs/show_bug.cgi?id=570844
https://bugs.eclipse.org/bugs/show_bug.cgi?id=570844