CVE-2021-41101

wire-server is an open-source back end for Wire, a secure collaboration platform. Before version 2.106.0, the CORS ` Access-Control-Allow-Origin ` header set by `nginz` is set for all subdomains of `.wire.com` (including `wire.com`). This means that if somebody were to find an XSS vector in any of the subdomains, they could use it to talk to the Wire API using the user's Cookie. A patch does not exist, but a workaround does. To make sure that a compromise of one subdomain does not yield access to the cookie of another, one may limit the `Access-Control-Allow-Origin` header to apps that actually require the cookie (account-pages, team-settings and the webapp).

CVSS v3 5.7 MEDIUM
CVSS v2.0 3.5 LOW

5.7^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.1 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

3.5^/10

CVSS v2.0 : LOW

Vector : AV:N/AC:M/Au:S/C:P/I:N/A:N

Exploitability : 6.8 / Impact : 2.9

Access Vector NETWORK

Access Complexity MEDIUM

Authentication SINGLE

Confidentiality Impact PARTIAL

Integrity Impact NONE

Availability Impact NONE

References

Link	Resource
https://github.com/wireapp/wire-server/security/advisories/GHSA-v7xx-cx8m-g66p	Third Party Advisory
https://github.com/wireapp/wire-server/security/advisories/GHSA-v7xx-cx8m-g66p	Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:wire:wire_server:*:*:*:*:*:*:*:*

History

21 Nov 2024, 06:25

Type	Values Removed	Values Added
References	~~() https://github.com/wireapp/wire-server/security/advisories/GHSA-v7xx-cx8m-g66p - Third Party Advisory~~	() https://github.com/wireapp/wire-server/security/advisories/GHSA-v7xx-cx8m-g66p - Third Party Advisory

Information

Published : 2021-09-30 20:15

Updated : 2024-11-21 06:25

NVD link : CVE-2021-41101

Mitre link : CVE-2021-41101

CVE.ORG link : CVE-2021-41101

JSON object : View

Products Affected

wire

wire_server

CWE

CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

{"id": "CVE-2021-41101", "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 3.5, "accessVector": "NETWORK", "vectorString": "AV:N/AC:M/Au:S/C:P/I:N/A:N", "authentication": "SINGLE", "integrityImpact": "NONE", "accessComplexity": "MEDIUM", "availabilityImpact": "NONE", "confidentialityImpact": "PARTIAL"}, "acInsufInfo": false, "impactScore": 2.9, "baseSeverity": "LOW", "obtainAllPrivilege": false, "exploitabilityScore": 6.8, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": true}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.7, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 3.6, "exploitabilityScore": 2.1}]}, "published": "2021-09-30T20:15:07.587", "references": [{"url": "https://github.com/wireapp/wire-server/security/advisories/GHSA-v7xx-cx8m-g66p", "tags": ["Third Party Advisory"], "source": "security-advisories@github.com"}, {"url": "https://github.com/wireapp/wire-server/security/advisories/GHSA-v7xx-cx8m-g66p", "tags": ["Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-79"}]}], "descriptions": [{"lang": "en", "value": "wire-server is an open-source back end for Wire, a secure collaboration platform. Before version 2.106.0, the CORS ` Access-Control-Allow-Origin ` header set by `nginz` is set for all subdomains of `.wire.com` (including `wire.com`). This means that if somebody were to find an XSS vector in any of the subdomains, they could use it to talk to the Wire API using the user's Cookie. A patch does not exist, but a workaround does. To make sure that a compromise of one subdomain does not yield access to the cookie of another, one may limit the `Access-Control-Allow-Origin` header to apps that actually require the cookie (account-pages, team-settings and the webapp)."}, {"lang": "es", "value": "wire-server es un back end de c\u00f3digo abierto para Wire, una plataforma de colaboraci\u00f3n segura. Versiones anteriores a 2.106.0, el encabezado CORS \"Access-Control-Allow-Origin\" establecida por \"nginz\" se establece para todos los subdominios de \".wire.com\" (incluyendo \"wire.com\"). Esto significa que si alguien encontrara un vector de tipo XSS en cualquiera de los subdominios, podr\u00eda usarlo para hablar con la API de Wire usando la Cookie del usuario. No se presenta un parche, pero s\u00ed una soluci\u00f3n. Para asegurarse de que un compromiso de un subdominio no da acceso a la cookie de otro, es posible limitar el encabezado \"Access-Control-Allow-Origin\" a las aplicaciones que realmente requieren la cookie (account-pages, team-settings y la webapp)"}], "lastModified": "2024-11-21T06:25:28.277", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:wire:wire_server:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F3F6AEA8-A71A-4653-BEFB-6B1F0612A2BA", "versionEndExcluding": "2.106.0"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}