CVE-2021-3795 Inefficient Regular Expression Complexity in sindresorhus/semver-regex
Attackers can cause denial of service in applications using semver-regex by triggering inefficient regular expression complexity.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-3795?
CVE-2021-3795 is a high-severity denial of service vulnerability in sindresorhus/semver-regex, published on 15 Sep 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
semver-regex is vulnerable to Inefficient Regular Expression Complexity
Weakness: CWE-1333
Which versions are affected by CVE-2021-3795?
4 open source packages ship an affected version, including semver-regex. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
semver-regex npm | All versions | 3.1.3 |
semver-regex npm | All versions | 3.1.3 |
semver-regex npm | From 4.0.0 | 4.0.1 |
semver-regex npm | From 4.0.0 | 4.0.1 |
Products include Semver-Regex Project Semver-Regex.
How do I fix CVE-2021-3795?
Upgrade semver-regex to a fixed version for your release line: 3.1.3 or 4.0.1.
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-2021-3795 being exploited?
There is no known exploitation of CVE-2021-3795 in the wild and no public exploit code.
Other vulnerabilities in sindresorhus/semver-regex
Sources
Also known as GHSA-44c6-4v22-4mhx, ROOT-APP-NPM-CVE-2021-3795.