FKIE_CVE-2017-0247
Vulnerability from fkie_nvd - Published: 2017-05-12 14:29 - Updated: 2025-04-20 01:37
Severity ?
Summary
A denial of service vulnerability exists when the ASP.NET Core fails to properly validate web requests. NOTE: Microsoft has not commented on third-party claims that the issue is that the TextEncoder.EncodeCore function in the System.Text.Encodings.Web package in ASP.NET Core Mvc before 1.0.4 and 1.1.x before 1.1.3 allows remote attackers to cause a denial of service by leveraging failure to properly calculate the length of 4-byte characters in the Unicode Non-Character range.
References
| URL | Tags | ||
|---|---|---|---|
| secure@microsoft.com | https://github.com/aspnet/Announcements/issues/239 | Technical Description, Third Party Advisory | |
| secure@microsoft.com | https://technet.microsoft.com/en-us/library/security/4021279.aspx | Patch, Vendor Advisory | |
| secure@microsoft.com | https://www.sidertia.com/Home/Community/Blog/2017/05/18/ASPNET-Core-Unicode-Non-Char-Encoding-DoS | Exploit, Third Party Advisory | |
| af854a3a-2127-422b-91ae-364da2661108 | https://github.com/aspnet/Announcements/issues/239 | Technical Description, Third Party Advisory | |
| af854a3a-2127-422b-91ae-364da2661108 | https://technet.microsoft.com/en-us/library/security/4021279.aspx | Patch, Vendor Advisory | |
| af854a3a-2127-422b-91ae-364da2661108 | https://www.sidertia.com/Home/Community/Blog/2017/05/18/ASPNET-Core-Unicode-Non-Char-Encoding-DoS | Exploit, Third Party Advisory |
Impacted products
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],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "A denial of service vulnerability exists when the ASP.NET Core fails to properly validate web requests. NOTE: Microsoft has not commented on third-party claims that the issue is that the TextEncoder.EncodeCore function in the System.Text.Encodings.Web package in ASP.NET Core Mvc before 1.0.4 and 1.1.x before 1.1.3 allows remote attackers to cause a denial of service by leveraging failure to properly calculate the length of 4-byte characters in the Unicode Non-Character range."
},
{
"lang": "es",
"value": "Se presenta una vulnerabilidad de denegaci\u00f3n de servicio cuando el Core de ASP.NET no puede comprobar apropiadamente las peticiones web. NOTA: Microsoft no ha comentado en reclamos de terceros de que el problema es que la funci\u00f3n TextEncoder.EncodeCore en el paquete System.Text.Encodings.Web en ASP.NET Core Mvc versiones anteriores a 1.0.4 y versiones 1.1.x anteriores a 1.1.3 permite a los atacantes remotos causar una denegaci\u00f3n de servicio aprovechando un fallo en calcular apropiadamente la longitud de los caracteres de 4 bytes en el rango sin car\u00e1cter Unicode."
}
],
"id": "CVE-2017-0247",
"lastModified": "2025-04-20T01:37:25.860",
"metrics": {
"cvssMetricV2": [
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"acInsufInfo": false,
"baseSeverity": "MEDIUM",
"cvssData": {
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"accessVector": "NETWORK",
"authentication": "NONE",
"availabilityImpact": "NONE",
"baseScore": 5.0,
"confidentialityImpact": "NONE",
"integrityImpact": "PARTIAL",
"vectorString": "AV:N/AC:L/Au:N/C:N/I:P/A:N",
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},
"exploitabilityScore": 10.0,
"impactScore": 2.9,
"obtainAllPrivilege": false,
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"source": "nvd@nist.gov",
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"attackVector": "NETWORK",
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"baseScore": 7.5,
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},
"published": "2017-05-12T14:29:03.910",
"references": [
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"tags": [
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],
"sourceIdentifier": "secure@microsoft.com",
"vulnStatus": "Deferred",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-20"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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