CVE-2024-37886: user oidc Signature Bypass — Fix

Description

user_oidc app is an OpenID Connect user backend for Nextcloud. An attacker could potentially trick the app into accepting a request that is not signed by the correct server. It is recommended that the Nextcloud user_oidc app is upgraded to 1.3.5, 2.0.0, 3.0.0, 4.0.0 or 5.0.0.

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CVSS v3.1 Score

5.4

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Weakness Type (CWE)

CWE-347 CWE-347

Affected Products

Vendor	Product	Versions
nextcloud	user_oidc	< 1.3.5

References

Advisories & Patches

https://github.com/nextcloud/security-advisories/security/advisories/GHSA-vw5h-29xf-g55g https://github.com/nextcloud/user_oidc/pull/715 https://github.com/nextcloud/security-advisories/security/advisories/GHSA-vw5h-29xf-g55g https://github.com/nextcloud/user_oidc/pull/715

Other References

https://hackerone.com/reports/1878391 https://hackerone.com/reports/1878391

Frequently Asked Questions

What is CVE-2024-37886? +

user_oidc app is an OpenID Connect user backend for Nextcloud. An attacker could potentially trick the app into accepting a request that is not signed by the correct server. It is recommended that the Nextcloud user_oidc app is upgraded to 1.3.5, 2.0.0, 3.0.0, 4.0.0 or 5.0.0. It has a CVSS v3.1 base score of 5.4 (MEDIUM).

How severe is CVE-2024-37886? +

CVE-2024-37886 has a CVSS v3.1 score of 5.4 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2024-37886? +

CVE-2024-37886 affects products from nextcloud, specifically: user_oidc. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-37886? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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CVE-2024-37886