CVE-2023-39953

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Summary

CVECVE-2023-39953
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2023-08-10 14:15:00 UTC
Updated2023-08-16 19:10:00 UTC
Descriptionuser_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.

Risk And Classification

Problem Types: CWE-303

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Nextcloud User Oidc All All All All

References

ReferenceSourceLinkTags
Issuer not verified from obtained token in user_oidc · Advisory · nextcloud/security-advisories · GitHub MISC github.com
Add iss and azp validation, improve audience validation by julien-nc · Pull Request #642 · nextcloud/user_oidc · GitHub MISC github.com
Just a moment... MISC hackerone.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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