GHSA-6394-6h9h-cfjg Regular Expression Denial of Service
Not scored
Published
Check this codebase for GHSA-6394-6h9h-cfjg and fix it if it is affected.
What it is: GHSA-6394-6h9h-cfjg is a denial of service vulnerability in nwmatcher, published on 7 Jun 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of GHSA-6394-6h9h-cfjg in the wild and no public exploit code.
Affected packages and fixed versions:
- nwmatcher (npm): affected all versions; fixed in 1.4.4
- nwmatcher (npm): affected all versions; fixed in 1.4.4
Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.
Reference: https://insights.sbomify.com/GHSA-6394-6h9h-cfjg/ (Markdown: https://insights.sbomify.com/GHSA-6394-6h9h-cfjg/index.md)
An attacker can cause a denial of service in applications using the nwmatcher library by triggering a regular expression vulnerability.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is GHSA-6394-6h9h-cfjg?
GHSA-6394-6h9h-cfjg is a denial of service vulnerability in nwmatcher, published on 7 Jun 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A Regular Expression vulnerability was found in nwmatcher before 1.4.4. The fix replacing multiple repeated instances of the "\s*" pattern.
Which versions are affected by GHSA-6394-6h9h-cfjg?
2 open source packages ship an affected version, including nwmatcher.
| Package | Affected | Fixed in |
|---|---|---|
nwmatcher npm | All versions | 1.4.4 |
nwmatcher npm | All versions | 1.4.4 |
How do I fix GHSA-6394-6h9h-cfjg?
Upgrade nwmatcher to 1.4.4 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 GHSA-6394-6h9h-cfjg being exploited?
There is no known exploitation of GHSA-6394-6h9h-cfjg in the wild and no public exploit code.