CVE-2021-21404: GO-2022-0888 - Crash due to malformed relay protocol message in github.com/syncthing/syncthing

CVE-2021-21404 · Severity: low · CVSS 3.1 · Published 2024-08-21

Crash due to malformed relay protocol message in github.com/syncthing/syncthing

Technologies: github.com/syncthing/syncthing (Go). Vendors: Go.

Quick answers

Is CVE-2021-21404 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2021-21404 being exploited in the wild.
How severe is CVE-2021-21404?
Low severity, with a CVSS score of 3.1, published 21 August 2024.
Which products and versions are affected?
github.com/syncthing/syncthing (Go) SEMVER:introduced=0,fixed=1.15.0.
Is there a fix for CVE-2021-21404?
Yes. github.com/syncthing/syncthing (Go): upgrade to 1.15.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2021-21404?
Check whether you run github.com/syncthing/syncthing (Go) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • github.com/syncthing/syncthing (Go): upgrade to 1.15.0 or later
    go get github.com/syncthing/syncthing@v1.15.0

Affected products

  • github.com/syncthing/syncthing (Go) SEMVER:introduced=0,fixed=1.15.0

Identifiers

  • CVE-2021-21404
  • GHSA-x462-89pf-6r5h
  • GO-2022-0888

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