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CVE-2023-32320 Nextcloud Server's brute force protection allows someone to send more requests than intended

High 8.7 Published Updated

Attackers can bypass brute force protection limits by sending parallel requests, allowing excessive attempts against protected details.

Exploited in the wild
Not known
Login needed
Not needed
Attackable
Over the internet
Victim action needed
Not needed
Fix
None listed

What is CVE-2023-32320?

CVE-2023-32320 is a high-severity vulnerability in Nextcloud Nextcloud Server, published on 22 Jun 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

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.

Weakness: CWE-307

Which versions are affected by CVE-2023-32320?

It affects 1 product.

Products include Nextcloud Nextcloud Server.

How do I fix CVE-2023-32320?

No fix has been published for CVE-2023-32320 yet. Limit exposure of the affected software until one is available.

Is CVE-2023-32320 being exploited?

There is no known exploitation of CVE-2023-32320 in the wild and no public exploit code.

All Nextcloud Nextcloud Server vulnerabilities

Sources

Also known as GHSA-qphh-6xh7-vffg.

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