CVE-2021-21404

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.
Configurations

Configuration 1 (hide)

cpe:2.3:a:syncthing:syncthing:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2021-04-06 20:15

Updated : 2024-02-04 21:47


NVD link : CVE-2021-21404

Mitre link : CVE-2021-21404

CVE.ORG link : CVE-2021-21404


JSON object : View

Products Affected

syncthing

  • syncthing
CWE
CWE-20

Improper Input Validation