GHSA-h6ch-v84p-w6p9 Regular Expression Denial of Service (ReDoS)
Not scored
Published
Check this codebase for GHSA-h6ch-v84p-w6p9 and fix it if it is affected.
What it is: GHSA-h6ch-v84p-w6p9 is a denial of service vulnerability in diff, published on 13 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-h6ch-v84p-w6p9 in the wild and no public exploit code.
Affected packages and fixed versions:
- diff (npm): affected all versions; fixed in 3.5.0
- diff (npm): affected all versions; fixed in 3.5.0
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-h6ch-v84p-w6p9/ (Markdown: https://insights.sbomify.com/GHSA-h6ch-v84p-w6p9/index.md)
An attacker can cause a denial of service in applications using the diff library by providing specially crafted input that triggers excessive regex processing.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is GHSA-h6ch-v84p-w6p9?
GHSA-h6ch-v84p-w6p9 is a denial of service vulnerability in diff, published on 13 Jun 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability was found in diff before v3.5.0, the affected versions of this package are vulnerable to Regular Expression Denial of Service (ReDoS) attacks.
Which versions are affected by GHSA-h6ch-v84p-w6p9?
2 open source packages ship an affected version, including diff.
| Package | Affected | Fixed in |
|---|---|---|
diff npm | All versions | 3.5.0 |
diff npm | All versions | 3.5.0 |
How do I fix GHSA-h6ch-v84p-w6p9?
Upgrade diff to 3.5.0 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 GHSA-h6ch-v84p-w6p9 being exploited?
There is no known exploitation of GHSA-h6ch-v84p-w6p9 in the wild and no public exploit code.