CVE-2021-28681
First published: Thu Mar 18 2021(Updated: )
### Impact Data channel communication was incorrectly allowed with users who have failed DTLS certificate verification. This attack requires * Attacker knows the ICE password. * Only take place during PeerConnection handshake. This attack can be detected by monitoring `PeerConnectionState` in all versions of Pion WebRTC. ### Patches Users should upgrade to v3.0.15. The exact patch is https://github.com/pion/webrtc/commit/545613dcdeb5dedb01cce94175f40bcbe045df2e ### Workarounds Users should listen for when `PeerConnectionState` changes to `PeerConnectionStateFailed`. When it enters this state users should not continue using the PeerConnection. ### For more information If you have any questions or comments about this advisory: * Open an issue in https://github.com/pion/webrtc * Email us at [team@pion.ly](mailto:team@pion.ly) Thank you to https://github.com/Gaukas for discovering this.
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Webrtc Project Webrtc | <3.0.15 |
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Reference Links
- https://github.com/pion/webrtc/security/advisories/GHSA-74xm-qj29-cq8p
- https://nvd.nist.gov/vuln/detail/CVE-2021-28681
- https://github.com/pion/webrtc/issues/1708
- https://github.com/pion/webrtc/pull/1709
- https://github.com/pion/webrtc/commit/545613dcdeb5dedb01cce94175f40bcbe045df2e
- https://pkg.go.dev/vuln/GO-2021-0104
- https://github.com/advisories/GHSA-74xm-qj29-cq8p (Advisory)
Frequently Asked Questions
What is the severity of CVE-2021-28681?
The severity of CVE-2021-28681 is medium with a severity value of 5.3.
What is the impact of CVE-2021-28681?
The impact of CVE-2021-28681 is that data channel communication was incorrectly allowed with users who have failed DTLS certificate verification.
How can CVE-2021-28681 be detected?
CVE-2021-28681 can be detected by monitoring the PeerConnectionState in the application.
What is the affected software of CVE-2021-28681?
The affected software of CVE-2021-28681 is Pion WebRTC before version 3.0.15.
How can I fix CVE-2021-28681?
To fix CVE-2021-28681, update Pion WebRTC to version 3.0.15 or higher.
- collector/github-advisory-latest
- alias/GHSA-74xm-qj29-cq8p
- alias/CVE-2021-28681
- collector/github-advisory
- collector/nvd-index
- collector/nvd-cve
- agent/references
- agent/weakness
- agent/severity
- agent/author
- agent/description
- agent/event
- agent/type
- agent/remedy
- agent/first-publish-date
- agent/tags
- agent/last-modified-date
- agent/softwarecombine
- collector/mitre-cve
- source/MITRE
- package-manager/go
- vendor/webrtc project
- canonical/webrtc project webrtc