CVE-2023-29000

low-risk
Published 2023-04-04

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.

Do I need to act?

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0.11% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.4/10 Medium
NETWORK / LOW complexity

Affected Products (1)

Affected Vendors

Nextcloud

References (6)

Patch https://github.com/nextcloud/desktop/pull/4949
Vendor Advisory https://github.com/nextcloud/security-advisories/security/advisories/GHSA-h82x-9...
Permissions Required https://hackerone.com/reports/1679267
Patch https://github.com/nextcloud/desktop/pull/4949
Vendor Advisory https://github.com/nextcloud/security-advisories/security/advisories/GHSA-h82x-9...
Permissions Required https://hackerone.com/reports/1679267
26
/ 100
low-risk
Severity 21/34 · High
Exploitability 0/34 · Minimal
Exposure 5/34 · Minimal