CVE-2023-39953

user_oidc provides the OIDC connect user backend for Nextcloud, an open-source cloud platform. Starting in version 1.0.0 and prior to version 1.3.3, missing verification of the issuer would have allowed an attacker to perform a man-in-the-middle attack returning corrupted or known token they also have access to. user_oidc 1.3.3 contains a patch. No known workarounds are available.

CVSS v3 4.8 MEDIUM

4.8^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.2 / Impact : 2.5

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-xx3h-v363-q36j	Patch Vendor Advisory
https://github.com/nextcloud/user_oidc/pull/642	Patch
https://hackerone.com/reports/2021684	Permissions Required

Configurations

Configuration 1 (hide)

cpe:2.3:a:nextcloud:user_oidc:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2023-08-10 14:15

Updated : 2023-08-16 19:10

NVD link : CVE-2023-39953

Mitre link : CVE-2023-39953

CVE.ORG link : CVE-2023-39953

JSON object : View

Products Affected

nextcloud

user_oidc

CWE

CWE-303

Incorrect Implementation of Authentication Algorithm

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