CVE-2021-21404

Katalog CVE

CVSS 7.5 · High EPSS 2,0%

Kerentanan Improper Input Validation pada syncthing. Skor CVSS 3.1 7.5 (High) menurut NVD.

Deskripsi (NVD)

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.

Rincian

Terbit di NVD

6 April 2021

Terakhir diubah

17 Juni 2026

Status NVD

Modified

CVSS 3.1

7.5 (High), sumber NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-20: Improper Input Validation

EPSS (30 hari)

2,0% peluang dieksploitasi; lebih tinggi dari 79,9% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://github.com/syncthing/syncthing/commit/fb4fdaf4c0a79c22cad000c42ac1394e3ccb6a97 patch · advisory pihak ketiga
• https://github.com/syncthing/syncthing/releases/tag/v1.15.0 release notes · advisory pihak ketiga
• https://github.com/syncthing/syncthing/security/advisories/GHSA-x462-89pf-6r5h advisory pihak ketiga
• https://pkg.go.dev/github.com/syncthing/syncthing product · advisory pihak ketiga