Vulnerability in Nextcloud Desktop
CVE-2023-28997
The Nextcloud Desktop Client is a tool to synchronize files from Nextcloud Server. Starting with version 3.0.0 and prior to version 3.6.5, a malicious server administrator can recover and modify the contents of end-to-end encrypted files. Users should upgrade the Nextcloud Desktop client to 3.6.5 to receive a patch. No known workarounds are available.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.7 (Medium). Vector: CVSS:3.1/AV:P/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.011 (64.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 65th percentile — 64.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000
Affected products
- Nextcloud Desktop
- Nextcloud Security-Advisories — versions >= 3.0.0, < 3.6.5
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/nextcloud/security-advisories/security/advisories/GHSA-4p33-rw27-j5fc (Vendor Advisory)
- github.com/nextcloud/desktop/pull/5324 (Patch)
- ethz.ch/content/dam/ethz/special-interest/infk/inst-infsec/appliedcrypto/educat… (Technical Description, Exploit, Third Party Advisory)
- af854a3a-2127-422b-91ae-364da2661108
Frequently asked questions
- What is CVE-2023-28997?
- CVE-2023-28997 is a medium-severity vulnerability in Nextcloud Desktop, classified under Reusing a Nonce, Key Pair in Encryption. CVSS score: 6.7/10. Published 2023-04-04.
- How severe is CVE-2023-28997?
- Medium severity. CVSS v3 base score is 6.7 out of 10.
- Is CVE-2023-28997 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.