CVE-2021-23425 Regular Expression Denial of Service (ReDoS)
Attackers can cause denial of service in applications using the trim-off-newlines library by submitting specially crafted strings that trigger excessive CPU usage.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-23425?
CVE-2021-23425 is a medium-severity denial of service vulnerability in trim-off-newlines, published on 18 Aug 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
All versions of package trim-off-newlines are vulnerable to Regular Expression Denial of Service (ReDoS) via string processing.
Which versions are affected by CVE-2021-23425?
2 open source packages ship an affected version, including trim-off-newlines. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
trim-off-newlines npm | All versions | 1.0.3 |
trim-off-newlines npm | All versions | 1.0.3 |
Products include Trim-Off-Newlines Project Trim-Off-Newlines.
How do I fix CVE-2021-23425?
Upgrade trim-off-newlines to 1.0.3 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-2021-23425 being exploited?
There is no known exploitation of CVE-2021-23425 in the wild and no public exploit code.
Sources
Also known as GHSA-38fc-wpqx-33j7.