High severity · published Feb 3, 2021
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…
7.5
CVSS
0.9%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.9% · higher than 58% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CA
Californium · Eclipse
2.3.0 through 2.6.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-27222
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-27222
Permissions Required
https://bugs.eclipse.org/bugs/show_bug.cgi?id=570844
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