CVE-2020-7689 Insecure Encryption
Medium 5.9
Published
Updated
Check this codebase for CVE-2020-7689 and fix it if it is affected.
What it is: CVE-2020-7689 is a medium-severity vulnerability in bcrypt, published on 1 Jul 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2020-7689 in the wild and no public exploit code.
Affected packages and fixed versions:
- bcrypt (npm): affected all versions; fixed in 5.0.0
- bcrypt (npm): affected all versions; fixed in 5.0.0
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/CVE-2020-7689/ (Markdown: https://insights.sbomify.com/CVE-2020-7689/index.md)
The bcrypt library incorrectly truncates data longer than 255 bytes, potentially weakening password hashes and allowing security bypasses.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2020-7689?
CVE-2020-7689 is a medium-severity vulnerability in bcrypt, published on 1 Jul 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Data is truncated wrong when its length is greater than 255 bytes.
Which versions are affected by CVE-2020-7689?
2 open source packages ship an affected version, including bcrypt. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
bcrypt npm | All versions | 5.0.0 |
bcrypt npm | All versions | 5.0.0 |
Products include Node.bcrypt.js Project Node.bcrypt.js.
How do I fix CVE-2020-7689?
Upgrade bcrypt to 5.0.0 or later.
Is CVE-2020-7689 being exploited?
There is no known exploitation of CVE-2020-7689 in the wild and no public exploit code.
Sources
Also known as GHSA-5wg4-74h6-q47v, SNYK-JS-BCRYPT-572911.