CVE-2021-32678 Ratelimit not applied on OCS API responses

What is CVE-2021-32678?

CVE-2021-32678 is a low-severity vulnerability in Fedoraproject Fedora, published on 12 Jul 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Nextcloud Server is a Nextcloud package that handles data storage. In versions prior to 19.0.13, 20.0.11, and 21.0.3, ratelimits are not applied to OCS API responses. This affects any OCS API controller (`OCSController`) using the `@BruteForceProtection` annotation. Risk depends on the installed applications on the Nextcloud Server, but could range from bypassing authentication ratelimits or spamming other Nextcloud users. The vulnerability is patched in versions 19.0.13, 20.0.11, and 21.0.3. No workarounds aside from upgrading are known to exist.

Weakness: CWE-307, CWE-799

Which versions are affected by CVE-2021-32678?

It affects 2 products.

Products include Fedoraproject Fedora, Nextcloud Nextcloud Server.

How do I fix CVE-2021-32678?

Upgrade to a fixed version.

Is CVE-2021-32678 being exploited?

There is no known exploitation of CVE-2021-32678 in the wild and no public exploit code.

Other vulnerabilities in Fedoraproject Fedora

• CVE-2024-4577 PHP-CGI OS Command Injection Exploited Critical 9.8
• CVE-2021-39226 Grafana Authentication Bypass Exploited Critical 9.8
• CVE-2019-5544 VMware ESXi and Horizon DaaS OpenSLP Heap-Based Buffer Overflow Exploited Critical 9.8
• CVE-2024-4947 Google Chromium V8 Type Confusion Exploited Critical 9.6
• CVE-2024-4671 Google Chromium Visuals Use-After-Free Exploited Critical 9.6

All Fedoraproject Fedora vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-48rx-3gmf-g74j.