CVE-2021-23341 Regular Expression Denial of Service (ReDoS)
Attackers can cause a denial of service in applications using PrismJS by exploiting inefficient regular expressions in specific language components.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-23341?
CVE-2021-23341 is a high-severity denial of service vulnerability in prismjs, published on 18 Feb 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The package prismjs before 1.23.0 are vulnerable to Regular Expression Denial of Service (ReDoS) via the prism-asciidoc, prism-rest, prism-tap and prism-eiffel components.
Which versions are affected by CVE-2021-23341?
2 open source packages ship an affected version, including prismjs. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
prismjs npm | All versions | 1.23.0 |
prismjs npm | All versions | 1.23.0 |
Products include Prismjs Prism.
How do I fix CVE-2021-23341?
Upgrade prismjs to 1.23.0 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-2021-23341 being exploited?
There is no known exploitation of CVE-2021-23341 in the wild and no public exploit code.
Other vulnerabilities in prismjs
Sources
Also known as DEBIAN-CVE-2021-23341, GHSA-h4hr-7fg3-h35w, ROOT-APP-NPM-CVE-2021-23341, UBUNTU-CVE-2021-23341.