CVE-2023-32320

Summary

Nextcloud Server is a data storage system for Nextcloud, a self-hosted productivity platform. When multiple requests are sent in parallel, all of them were executed even if the amount of faulty requests succeeded the limit by the time the response was sent to the client. This allowed someone to send as many requests the server could handle in parallel to bruteforce protected details instead of the configured limit, default 8. Nextcloud Server versions 25.0.7 and 26.0.2 and Nextcloud Enterprise Server versions 21.0.9.12, 22.2.10.12, 23.0.12.7, 24.0.12.2, 25.0.7 and 26.0.2 contain patches for this issue.

Affected Software

VendorProductVersion RangeStatus
nextcloudsecurity-advisoriesNextcloud Server >= 25.0.0, < 25.0.7affected
nextcloudsecurity-advisoriesNextcloud Server >= 26.0.0, < 26.0.2affected
nextcloudsecurity-advisoriesNextcloud Enterprise Server >= 21.0.0, < 21.0.9.12affected
nextcloudsecurity-advisoriesNextcloud Enterprise Server >= 22.0.0, < 22.2.10.12affected
nextcloudsecurity-advisoriesNextcloud Enterprise Server >= 23.0.0, < 23.0.12.7affected
nextcloudsecurity-advisoriesNextcloud Enterprise Server >= 24.0.0, < 24.0.12.2affected
nextcloudsecurity-advisoriesNextcloud Enterprise Server >= 25.0.0, < 25.0.7affected
nextcloudsecurity-advisoriesNextcloud Enterprise Server >= 26.0.0, < 26.0.2affected

Weaknesses

  • CWE-307: CWE-307: Improper Restriction of Excessive Authentication Attempts

ADP Enrichment

CVE Program Container

Additional References

CISA ADP Vulnrichment

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

References