CVE-2021-33587 Denial of service in css-what
An attacker can cause a denial of service by providing input that triggers quadratic time complexity in the CSS attribute parser.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-33587?
CVE-2021-33587 is a high-severity denial of service vulnerability in Netapp E-Series Performance Analyzer, published on 28 May 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The css-what package 4.0.0 through 5.0.0 for Node.js does not ensure that attribute parsing has Linear Time Complexity relative to the size of the input.
Which versions are affected by CVE-2021-33587?
2 open source packages ship an affected version, including css-what. It affects 2 products.
| Package | Affected | Fixed in |
|---|---|---|
css-what npm | From 4.0.0 | 5.0.1 |
css-what npm | From 4.0.0 | 5.0.1 |
Products include Css-What Project Css-What, Netapp E-Series Performance Analyzer.
How do I fix CVE-2021-33587?
Upgrade css-what to 5.0.1 or later.
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-2021-33587 being exploited?
There is no known exploitation of CVE-2021-33587 in the wild and no public exploit code.
Other vulnerabilities in Netapp E-Series Performance Analyzer
Sources
Also known as CLSA-2026-1790414394, DEBIAN-CVE-2021-33587, GHSA-q8pj-2vqx-8ggc, ROOT-APP-NPM-CVE-2021-33587, UBUNTU-CVE-2021-33587.