4.8 - CVE-2023-39953

Executive Summary

Informations
Name	CVE-2023-39953	First vendor Publication	2023-08-10
Vendor	Cve	Last vendor Modification	2023-08-16

Security-Database Scoring CVSS v3

Cvss vector : CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
Overall CVSS Score	4.8
Base Score	4.8	Environmental Score	4.8
impact SubScore	2.5	Temporal Score	4.8
Exploitabality Sub Score	2.2

Attack Vector	Network	Attack Complexity	High
Privileges Required	None	User Interaction	None
Scope	Unchanged	Confidentiality Impact	Low
Integrity Impact	Low	Availability Impact	None
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector :
Cvss Base Score	N/A	Attack Range	N/A
Cvss Impact Score	N/A	Attack Complexity	N/A
Cvss Expoit Score	N/A	Authentication	N/A
Calculate full CVSS 2.0 Vectors scores

Detail

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.

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-39953

CWE : Common Weakness Enumeration

%	Id	Name
100 %	CWE-303	Incorrect Implementation of Authentication Algorithm

CPE : Common Platform Enumeration

Type	Description	Count
Application	Nextcloud User Oidc cpe:2.3:a:nextcloud:user_oidc::::::::	1

Sources (Detail)

Source	Url
MISC	https://github.com/nextcloud/security-advisories/security/advisories/GHSA-xx3... https://github.com/nextcloud/user_oidc/pull/642 https://hackerone.com/reports/2021684