CVE-2022-29189 Buffer for inbound DTLS fragments has no limit

What is CVE-2022-29189?

CVE-2022-29189 is a medium-severity denial of service vulnerability in pion dtls, published on 20 May 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Pion DTLS is a Go implementation of Datagram Transport Layer Security. Prior to version 2.1.4, a buffer that was used for inbound network traffic had no upper limit. Pion DTLS would buffer all network traffic from the remote user until the handshake completes or timed out. An attacker could exploit this to cause excessive memory usage. Version 2.1.4 contains a patch for this issue. There are currently no known workarounds available.

Weakness: CWE-120

Which versions are affected by CVE-2022-29189?

5 open source packages ship an affected version, including github.com/pion/dtls/v2 and github.com/pion/dtls. It affects 1 product.

Products include Pion Dtls.

How do I fix CVE-2022-29189?

Upgrade github.com/pion/dtls/v2 to 2.1.4 or later.

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-2022-29189 being exploited?

There is no known exploitation of CVE-2022-29189 in the wild and no public exploit code.

Other vulnerabilities in pion dtls

• CVE-2019-20786 Improper Authenication in Pion DTLS Critical 9.8
• CVE-2022-29190 Header reconstruction method can be thrown into an infinite loop in Pion DTLS High 7.5
• CVE-2026-26014 Pion DTLS uses random nonce generation with AES GCM ciphers risks leaking the authentication key Medium 5.9
• CVE-2022-29222 Improper Certificate Validation in Pion DTLS Medium 5.9

Sources

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

Also known as DEBIAN-CVE-2022-29189, GHSA-cx94-mrg9-rq4j, GO-2022-0461, UBUNTU-CVE-2022-29189.