Vulnerability in Nextcloud Desktop
CVE-2023-29000
The Nextcloud Desktop Client is a tool to synchronize files from Nextcloud Server. Starting with version 3.0.0 and prior to version 3.7.0, by trusting that the server will return a certificate that belongs to the keypair of the user, a malicious server could get the desktop client to encrypt files with a key known to the attacker. This issue is fixed in Nextcloud Desktop 3.7.0. No known workarounds are available.
Vulnerability class: Improper Certificate Validation
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.004 (30.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 30th percentile — 30.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Nextcloud Desktop
- Nextcloud Security-Advisories — versions >= 3.0.0, < 3.7.0
Weakness classification (CWE)
References
- github.com/nextcloud/security-advisories/security/advisories/GHSA-h82x-98q3-7534 (Vendor Advisory)
- github.com/nextcloud/desktop/pull/4949 (Patch)
- hackerone.com/reports/1679267 (Permissions Required)
Frequently asked questions
- What is CVE-2023-29000?
- CVE-2023-29000 is a medium-severity vulnerability in Nextcloud Desktop, classified under Improper Certificate Validation. CVSS score: 5.4/10. Published 2023-04-04.
- How severe is CVE-2023-29000?
- Medium severity. CVSS v3 base score is 5.4 out of 10.