CVE-2021-3531 Denial of service in ceph

What is CVE-2021-3531?

CVE-2021-3531 is a medium-severity denial of service vulnerability in Fedoraproject Fedora, published on 18 May 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A flaw was found in the Red Hat Ceph Storage RGW in versions before 14.2.21. When processing a GET Request for a swift URL that ends with two slashes it can cause the rgw to crash, resulting in a denial of service. The greatest threat to the system is of availability.

Weakness: CWE-617, CWE-20

Which versions are affected by CVE-2021-3531?

It affects 3 products.

Products include Fedoraproject Fedora, Redhat Ceph, Redhat Ceph Storage.

How do I fix CVE-2021-3531?

Upgrade to a fixed version.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2021-3531 being exploited?

There is no known exploitation of CVE-2021-3531 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 DEBIAN-CVE-2021-3531, GHSA-wc6g-g56r-jp2f, UBUNTU-CVE-2021-3531.