fkie_cve-2020-1967
Vulnerability from fkie_nvd
Published
2020-04-21 14:15
Modified
2024-11-21 05:11
Severity ?
Summary
Server or client applications that call the SSL_check_chain() function during or after a TLS 1.3 handshake may crash due to a NULL pointer dereference as a result of incorrect handling of the "signature_algorithms_cert" TLS extension. The crash occurs if an invalid or unrecognised signature algorithm is received from the peer. This could be exploited by a malicious peer in a Denial of Service attack. OpenSSL version 1.1.1d, 1.1.1e, and 1.1.1f are affected by this issue. This issue did not affect OpenSSL versions prior to 1.1.1d. Fixed in OpenSSL 1.1.1g (Affected 1.1.1d-1.1.1f).
References
Impacted products
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"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "Server or client applications that call the SSL_check_chain() function during or after a TLS 1.3 handshake may crash due to a NULL pointer dereference as a result of incorrect handling of the \"signature_algorithms_cert\" TLS extension. The crash occurs if an invalid or unrecognised signature algorithm is received from the peer. This could be exploited by a malicious peer in a Denial of Service attack. OpenSSL version 1.1.1d, 1.1.1e, and 1.1.1f are affected by this issue. This issue did not affect OpenSSL versions prior to 1.1.1d. Fixed in OpenSSL 1.1.1g (Affected 1.1.1d-1.1.1f)."
},
{
"lang": "es",
"value": "Las aplicaciones de Servidor o Cliente que llaman a la funci\u00f3n SSL_check_chain() durante o despu\u00e9s del protocolo de enlace de TLS versi\u00f3n 1.3, puede bloquear debido a una desreferencia del puntero NULL como resultado de un manejo incorrecto de la extensi\u00f3n TLS \"signature_algorithms_cert\". El bloqueo ocurre si se recibe un algoritmo de firma no comprobada o ni reconocido del peer. Esto podr\u00eda ser explotado por un peer malicioso en un ataque de Denegaci\u00f3n de Servicio. OpenSSL versiones 1.1.1d, 1.1.1e y 1.1.1f est\u00e1n afectadas por este problema. Este problema no afectaba a OpenSSL versiones anteriores a la versi\u00f3n 1.1.1d. Corregido en OpenSSL versi\u00f3n 1.1.1g (Afectado en la versi\u00f3n 1.1.1d-1.1.1f)."
}
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"id": "CVE-2020-1967",
"lastModified": "2024-11-21T05:11:45.023",
"metrics": {
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{
"acInsufInfo": false,
"baseSeverity": "MEDIUM",
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"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"
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"exploitabilityScore": 10.0,
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"obtainAllPrivilege": false,
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"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"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",
"version": "3.1"
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"published": "2020-04-21T14:15:11.287",
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{
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{
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},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
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"url": "https://security.FreeBSD.org/advisories/FreeBSD-SA-20:11.openssl.asc"
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{
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{
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{
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{
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"url": "https://www.synology.com/security/advisory/Synology_SA_20_05"
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{
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},
{
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"url": "https://www.tenable.com/security/tns-2020-03"
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],
"sourceIdentifier": "openssl-security@openssl.org",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-476"
}
],
"source": "nvd@nist.gov",
"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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