CVE-2023-39954

Summary

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, an attacker that obtained at least read access to a snapshot of the database can impersonate the Nextcloud server towards linked servers. user_oidc 1.3.3 contains a patch. No known workarounds are available.

Affected Software

Weaknesses

• CWE-311: CWE-311: Missing Encryption of Sensitive Data

ADP Enrichment

CVE Program Container

Additional References

• https://github.com/nextcloud/security-advisories/security/advisories/GHSA-3f92-5c8p-f6gq
• https://github.com/nextcloud/user_oidc/pull/636
• https://hackerone.com/reports/1994328

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: no
  • Technical Impact: partial

References

• https://github.com/nextcloud/security-advisories/security/advisories/GHSA-3f92-5c8p-f6gq
• https://github.com/nextcloud/user_oidc/pull/636
• https://hackerone.com/reports/1994328

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