CVE-2023-32320: Nextcloud Server's brute force protection allows someone to send more requests than intended
First published: Thu Jun 22 2023(Updated: )
Nextcloud Server is a data storage system for Nextcloud, a self-hosted productivity platform. When multiple requests are sent in parallel, all of them were executed even if the amount of faulty requests succeeded the limit by the time the response was sent to the client. This allowed someone to send as many requests the server could handle in parallel to bruteforce protected details instead of the configured limit, default 8. Nextcloud Server versions 25.0.7 and 26.0.2 and Nextcloud Enterprise Server versions 21.0.9.12, 22.2.10.12, 23.0.12.7, 24.0.12.2, 25.0.7 and 26.0.2 contain patches for this issue.
Credit: security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Nextcloud Nextcloud Server | >=21.0.0<21.0.9.12 | |
| Nextcloud Nextcloud Server | >=22.0.0<22.2.10.12 | |
| Nextcloud Nextcloud Server | >=23.0.0<23.0.12.7 | |
| Nextcloud Nextcloud Server | >=24.0.0<24.0.12.2 | |
| Nextcloud Nextcloud Server | >=25.0.0<25.0.7 | |
| Nextcloud Nextcloud Server | >=25.0.0<25.0.7 | |
| Nextcloud Nextcloud Server | >=26.0.0<26.0.2 | |
| Nextcloud Nextcloud Server | >=26.0.0<26.0.2 |
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
Frequently Asked Questions
What is the vulnerability ID of this Nextcloud Server vulnerability?
The vulnerability ID is CVE-2023-32320.
What is the severity level of CVE-2023-32320?
The severity level of CVE-2023-32320 is high with a severity value of 7.5.
Which versions of Nextcloud Server are affected by CVE-2023-32320?
Nextcloud Server versions 21.0.0 to 21.0.9.12, 22.0.0 to 22.2.10.12, 23.0.0 to 23.0.12.7, 24.0.0 to 24.0.12.2, 25.0.0 to 25.0.7, and 26.0.0 to 26.0.2 are affected by CVE-2023-32320.
How can an attacker exploit CVE-2023-32320?
An attacker can exploit CVE-2023-32320 by sending multiple requests in parallel, bypassing the limit and allowing them to execute even if some of the requests are faulty.
Are there any references for CVE-2023-32320?
Yes, you can find references for CVE-2023-32320 at the following links: [GitHub Advisory](https://github.com/nextcloud/security-advisories/security/advisories/GHSA-qphh-6xh7-vffg), [GitHub Pull Request](https://github.com/nextcloud/server/pull/38274), [HackerOne Report](https://hackerone.com/reports/1918525).
- collector/nvd-index
- agent/type
- agent/remedy
- agent/softwarecombine
- collector/mitre-cve
- source/MITRE
- agent/last-modified-date
- agent/references
- agent/weakness
- agent/severity
- agent/title
- agent/description
- agent/author
- agent/first-publish-date
- agent/event
- agent/tags
- agent/source
- vendor/nextcloud
- canonical/nextcloud nextcloud server
- version/nextcloud nextcloud server/21.0.0
- version/nextcloud nextcloud server/22.0.0
- version/nextcloud nextcloud server/23.0.0
- version/nextcloud nextcloud server/24.0.0
- version/nextcloud nextcloud server/25.0.0
- version/nextcloud nextcloud server/26.0.0