CVE-2022-2576 Eclipse Californium denial of service (DoS) via Datagram Transport Layer Security (DTLS) handshake on parameter mismatch

What is CVE-2022-2576?

CVE-2022-2576 is a high-severity denial of service vulnerability in The Eclipse Foundation Eclipse Californium, published on 29 Jul 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

In Eclipse Californium version 2.0.0 to 2.7.2 and 3.0.0-3.5.0 a DTLS resumption handshake falls back to a DTLS full handshake on a parameter mismatch without using a HelloVerifyRequest. Especially, if used with certificate based cipher suites, that results in message amplification (DDoS other peers) and high CPU load (DoS own peer). The misbehavior occurs only with DTLS_VERIFY_PEERS_ON_RESUMPTION_THRESHOLD values larger than 0.

Weakness: CWE-408

Which versions are affected by CVE-2022-2576?

4 open source packages ship an affected version, including org.eclipse.californium:californium-core. It affects 1 product.

Products include Eclipse Californium.

How do I fix CVE-2022-2576?

Upgrade org.eclipse.californium:californium-core to a fixed version for your release line: 2.7.3 or 3.6.0.

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-2022-2576 being exploited?

There is no known exploitation of CVE-2022-2576 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 High 8.2
• CVE-2021-34433 Auth bypass in Eclipse Californium High 7.5
• CVE-2020-27222 Denial of service in Eclipse Californium High 7.5

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-qq3j-44gw-cf6r.