CVE-2020-27222 Denial of service in Eclipse Californium
Attackers can cause a denial of service in Eclipse Californium by triggering a specific DTLS handshake failure that corrupts the server state.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2020-27222?
CVE-2020-27222 is a high-severity denial of service vulnerability in The Eclipse Foundation Eclipse Californium, published on 3 Feb 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-372
Which versions are affected by CVE-2020-27222?
It affects 1 product.
Products include Eclipse Californium.
How do I fix CVE-2020-27222?
No fix has been published for CVE-2020-27222 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2020-27222 being exploited?
There is no known exploitation of CVE-2020-27222 in the wild and no public exploit code.
Other vulnerabilities in The Eclipse Foundation Eclipse Californium
- CVE-2022-39368 Californium Failing DTLS handshakes causes Data Loss due to throttling blocking processing of records
- CVE-2022-2576 Eclipse Californium denial of service (DoS) via Datagram Transport Layer Security (DTLS) handshake on parameter mismatch
- CVE-2021-34433 Auth bypass in Eclipse Californium
Sources
Also known as GHSA-wfcg-xg9m-fp2f.