fkie_cve-2021-21404
Vulnerability from fkie_nvd
Published
2021-04-06 20:15
Modified
2024-11-21 05:48
Severity ?
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
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.
References
{
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:syncthing:syncthing:*:*:*:*:*:*:*:*",
"matchCriteriaId": "13E0DFD1-14D6-4A2D-B98C-1C581D11E2F0",
"versionEndExcluding": "1.15.0",
"vulnerable": true
}
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"negate": false,
"operator": "OR"
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"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "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\u0027s likely to pick another non-malicious relay. This flaw is fixed in version 1.15.0."
},
{
"lang": "es",
"value": "Syncthing es un programa de sincronizaci\u00f3n de archivos continua.\u0026#xa0;En Syncthing versiones anteriores a 1.15.0, el servidor de retransmisi\u00f3n \"strelaysrv\" puede causar un bloqueo y salida mediante el env\u00edo de un mensaje de retransmisi\u00f3n con un campo de longitud negativa.\u0026#xa0;De manera similar, Syncthing en s\u00ed puede presentar un fallo por la misma raz\u00f3n si recibe un mensaje malformado de un servidor de retransmisi\u00f3n malicioso al intentar unirse a la retransmisi\u00f3n.\u0026#xa0;Las uniones de retransmisiones son esencialmente aleatorias (de un subconjunto de retransmisiones de baja latencia) y Syncthing se reiniciar\u00e1 por defecto cuando se bloquee, momento en el que es probable que elija otra retransmisi\u00f3n no maliciosa.\u0026#xa0;Este fallo es corregido en la versi\u00f3n 1.15.0"
}
],
"id": "CVE-2021-21404",
"lastModified": "2024-11-21T05:48:17.280",
"metrics": {
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{
"acInsufInfo": false,
"baseSeverity": "MEDIUM",
"cvssData": {
"accessComplexity": "LOW",
"accessVector": "NETWORK",
"authentication": "NONE",
"availabilityImpact": "PARTIAL",
"baseScore": 5.0,
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
"version": "2.0"
},
"exploitabilityScore": 10.0,
"impactScore": 2.9,
"obtainAllPrivilege": false,
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"source": "nvd@nist.gov",
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"baseScore": 7.5,
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"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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"scope": "UNCHANGED",
"userInteraction": "NONE",
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"source": "nvd@nist.gov",
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"published": "2021-04-06T20:15:13.490",
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"url": "https://github.com/syncthing/syncthing/security/advisories/GHSA-x462-89pf-6r5h"
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"url": "https://pkg.go.dev/github.com/syncthing/syncthing"
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"sourceIdentifier": "security-advisories@github.com",
"vulnStatus": "Modified",
"weaknesses": [
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"description": [
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"lang": "en",
"value": "CWE-20"
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],
"source": "security-advisories@github.com",
"type": "Primary"
}
]
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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