VDB
CVE-2021-21404
CVE-2021-21404
PUBLISHED
CVSS 7.5 HIGH
Syncthing is a continuous file synchronization program. In Syncthing before version 1.15.0, the relay server `strelaysrv` can be caused to crash and exit by sending a relay message with a negative length field. Similarly, Syncthing itself can crash for the same reason if given a malformed message from a malicious relay server when attempting to join the relay. Relay joins are essentially random (from a subset of low latency relays) and Syncthing will by default restart when crashing, at which point it's likely to pick another non-malicious relay. This flaw is fixed in version 1.15.0.
EPSS 1.97% · 79.1th percentile
Risk Scores
CVSS 3.1
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS Score
1.97%
79.1th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Bitnami | syncthing | 0 |
| Bitnami | syncthing | 0 |
Timeline
- Apr 6, 2021 CVE Published
- Apr 14, 2021 EPSS Score
- Jun 23, 2021 EPSS Score
- Oct 26, 2021 EPSS Score
- Dec 28, 2021 EPSS Score
- Jan 6, 2022 EPSS Score
- Mar 1, 2022 EPSS Score
- Apr 1, 2022 EPSS Score
- May 3, 2022 EPSS Score
- Jul 4, 2022 EPSS Score
- Nov 8, 2022 EPSS Score
- Jan 10, 2023 EPSS Score
References
- https://github.com/syncthing/syncthing/commit/fb4fdaf4c0a79c22cad000c42ac1394e3ccb6a97 url
- https://github.com/syncthing/syncthing/releases/tag/v1.15.0 url
- https://pkg.go.dev/github.com/syncthing/syncthing url
- https://github.com/syncthing/syncthing/security/advisories/GHSA-x462-89pf-6r5h url
- https://nvd.nist.gov/vuln/detail/CVE-2021-21404 url