CVE-2020-7695

Uvicorn before 0.11.7 is vulnerable to HTTP response splitting. CRLF sequences are not escaped in the value of HTTP headers. Attackers can exploit this to add arbitrary headers to HTTP responses, or even return an arbitrary response body, whenever crafted input is used to construct HTTP headers.

CVSS v3 5.3 MEDIUM
CVSS v2.0 5.0 MEDIUM

5.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

5.0^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:L/Au:N/C:N/I:P/A:N

Exploitability : 10.0 / Impact : 2.9

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact NONE

Integrity Impact PARTIAL

Availability Impact NONE

References

Link	Resource
https://github.com/encode/uvicorn	Third Party Advisory
https://snyk.io/vuln/SNYK-PYTHON-UVICORN-570471	Exploit Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:encode:uvicorn:*:*:*:*:*:*:*:*

History

31 Jan 2023, 17:26

Type	Values Removed	Values Added
CVSS	v2 : ~~5.0~~ v3 : ~~7.5~~	v2 : 5.0 v3 : 5.3
CPE	cpe:2.3:a:encode:uvicorn:-:::::::*	cpe:2.3:a:encode:uvicorn::::::::

Information

Published : 2020-07-27 12:15

Updated : 2023-12-10 13:27

NVD link : CVE-2020-7695

Mitre link : CVE-2020-7695

CVE.ORG link : CVE-2020-7695

JSON object : View

Products Affected

encode

uvicorn

CWE

CWE-74

Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')

{"id": "CVE-2020-7695", "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 5.0, "accessVector": "NETWORK", "vectorString": "AV:N/AC:L/Au:N/C:N/I:P/A:N", "authentication": "NONE", "integrityImpact": "PARTIAL", "accessComplexity": "LOW", "availabilityImpact": "NONE", "confidentialityImpact": "NONE"}, "acInsufInfo": false, "impactScore": 2.9, "baseSeverity": "MEDIUM", "obtainAllPrivilege": false, "exploitabilityScore": 10.0, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.3, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 1.4, "exploitabilityScore": 3.9}, {"type": "Secondary", "source": "report@snyk.io", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.3, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 1.4, "exploitabilityScore": 3.9}]}, "published": "2020-07-27T12:15:11.993", "references": [{"url": "https://github.com/encode/uvicorn", "tags": ["Third Party Advisory"], "source": "report@snyk.io"}, {"url": "https://snyk.io/vuln/SNYK-PYTHON-UVICORN-570471", "tags": ["Exploit", "Third Party Advisory"], "source": "report@snyk.io"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-74"}]}], "descriptions": [{"lang": "en", "value": "Uvicorn before 0.11.7 is vulnerable to HTTP response splitting. CRLF sequences are not escaped in the value of HTTP headers. Attackers can exploit this to add arbitrary headers to HTTP responses, or even return an arbitrary response body, whenever crafted input is used to construct HTTP headers."}, {"lang": "es", "value": "Uvicornio versiones anteriores a 0.11.7 es vulnerable a la divisi\u00f3n de la respuesta HTTP.Las secuencias CRLF no escapaban en el valor de los encabezados HTTP. Los atacantes pueden explotar esto para agregar encabezados arbitrarios en las respuestas HTTP, o inclusive devolver un cuerpo de respuesta arbitrario, siempre que es usada una entrada dise\u00f1ada para construir encabezados HTTP"}], "lastModified": "2023-01-31T17:26:01.747", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:encode:uvicorn:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E750BB78-C143-4CA3-91BB-658416FB7748", "versionEndExcluding": "0.11.7"}], "operator": "OR"}]}], "sourceIdentifier": "report@snyk.io"}