Vulnerability Description
Nextcloud is an open-source productivity platform. In Nextcloud Desktop client 3.0.0 until 3.8.0, Nextcloud Android app 3.13.0 until 3.25.0, and Nextcloud iOS app 3.0.5 until 4.8.0, a malicious server administrator can gain full access to an end-to-end encrypted folder. They can decrypt files, recover the folder structure and add new files. This issue is fixed in Nextcloud Desktop 3.8.0, Nextcloud Android 3.25.0, and Nextcloud iOS 4.8.0. No known workarounds are available.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Nextcloud | Desktop | >= 3.0.0, < 3.8.0 |
| Nextcloud | Nextcloud | >= 3.0.5, < 4.8.0 |
Related Weaknesses (CWE)
References
- https://ethz.ch/content/dam/ethz/special-interest/infk/inst-infsec/appliedcryptoExploitTechnical DescriptionThird Party Advisory
- https://github.com/nextcloud/desktop/pull/5560PatchVendor Advisory
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-8875-wVendor Advisory
- https://ethz.ch/content/dam/ethz/special-interest/infk/inst-infsec/appliedcryptoExploitTechnical DescriptionThird Party Advisory
- https://github.com/nextcloud/desktop/pull/5560PatchVendor Advisory
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-8875-wVendor Advisory
FAQ
What is CVE-2023-28999?
CVE-2023-28999 is a vulnerability with a CVSS score of 6.9 (MEDIUM). Nextcloud is an open-source productivity platform. In Nextcloud Desktop client 3.0.0 until 3.8.0, Nextcloud Android app 3.13.0 until 3.25.0, and Nextcloud iOS app 3.0.5 until 4.8.0, a malicious server...
How severe is CVE-2023-28999?
CVE-2023-28999 has been rated MEDIUM with a CVSS base score of 6.9/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2023-28999?
Check the references section above for vendor advisories and patch information. Affected products include: Nextcloud Desktop, Nextcloud Nextcloud.