Vulnerability · Published Apr 4, 2023 · Assigned by GitHub_M
CVE-2023-29000Nextcloud Desktop client does not verify received singed certificate in end-to-end encryption
Medium 5.4
In plain English
A medium-severity improper certificate validation in security-advisories from nextcloud. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 33% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | nextcloud-desktop | 3.7.0-1 | DEBIAN-CVE-2023-29000 |
| Debian:13 | nextcloud-desktop | 3.7.0-1 | DEBIAN-CVE-2023-29000 |
| Debian:14 | nextcloud-desktop | 3.7.0-1 | DEBIAN-CVE-2023-29000 |
| Ubuntu:22.04:LTS | nextcloud-desktop | no fix listed | UBUNTU-CVE-2023-29000 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| nextcloud | security-advisories | >= 3.0.0, < 3.7.0 |
Weakness: CWE-295 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
References
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-h82x-98q3-7534 x_refsource_CONFIRM
- https://github.com/nextcloud/desktop/pull/4949 x_refsource_MISC
- https://hackerone.com/reports/1679267 x_refsource_MISC