What is CVE-2023-29000?

CVE-2023-29000 is a vulnerability in the Nextcloud Desktop Client that allows a malicious server to encrypt files on the client's machine.

How does CVE-2023-29000 affect Nextcloud Desktop Client?

CVE-2023-29000 affects Nextcloud Desktop Client versions 3.0.0 to 3.7.0.

What is the severity of CVE-2023-29000?

CVE-2023-29000 has a severity rating of 6.5 (medium).

How can I mitigate the risk of CVE-2023-29000?

To mitigate the risk of CVE-2023-29000, it is recommended to update Nextcloud Desktop Client to version 3.7.0 or newer.

Where can I find more information about CVE-2023-29000?

You can find more information about CVE-2023-29000 at the following references: [Reference 1](https://github.com/nextcloud/desktop/pull/4949), [Reference 2](https://github.com/nextcloud/security-advisories/security/advisories/GHSA-h82x-98q3-7534), [Reference 3](https://hackerone.com/reports/1679267).

Vulnerability/
CVE-2023-29000

medium

6.5

CWE

295

4/4/2023

2/8/2024

CVE-2023-29000: Nextcloud Desktop client does not verify received singed certificate in end-to-end encryption

First published: Tue Apr 04 2023(Updated: )

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.

Credit: security-advisories@github.com

Affected Software	Affected Version	How to fix
Nextcloud Desktop	>=3.0.0<3.7.0

Remedy

https://github.com/nextcloud/desktop/pull/4949

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Reference Links

Frequently Asked Questions

What is CVE-2023-29000?
CVE-2023-29000 is a vulnerability in the Nextcloud Desktop Client that allows a malicious server to encrypt files on the client's machine.
How does CVE-2023-29000 affect Nextcloud Desktop Client?
CVE-2023-29000 affects Nextcloud Desktop Client versions 3.0.0 to 3.7.0.
What is the severity of CVE-2023-29000?
CVE-2023-29000 has a severity rating of 6.5 (medium).
How can I mitigate the risk of CVE-2023-29000?
To mitigate the risk of CVE-2023-29000, it is recommended to update Nextcloud Desktop Client to version 3.7.0 or newer.
Where can I find more information about CVE-2023-29000?
You can find more information about CVE-2023-29000 at the following references: [Reference 1](https://github.com/nextcloud/desktop/pull/4949), [Reference 2](https://github.com/nextcloud/security-advisories/security/advisories/GHSA-h82x-98q3-7534), [Reference 3](https://hackerone.com/reports/1679267).

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