CVE-2015-7764 Lemur uses static IV per key
High 7.5
Published
Updated
Check this codebase for CVE-2015-7764 and fix it if it is affected.
What it is: CVE-2015-7764 is a high-severity vulnerability in n/a, published on 9 Aug 2017. 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-2015-7764 in the wild and no public exploit code.
Affected packages and fixed versions:
- lemur (PyPI): affected all versions; fixed in 0.1.5
- lemur (PyPI): affected all versions; fixed in 0.1.5
- lemur (PyPI): affected all versions; fixed in 0.2.1
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-2015-7764/ (Markdown: https://insights.sbomify.com/CVE-2015-7764/index.md)
Insufficient entropy in AES CBC IV generation allows attackers to potentially decrypt sensitive data.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2015-7764?
CVE-2015-7764 is a high-severity vulnerability in n/a, published on 9 Aug 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Lemur 0.1.4 does not use sufficient entropy in its IV when encrypting AES in CBC mode.
Weakness: CWE-331
Which versions are affected by CVE-2015-7764?
3 open source packages ship an affected version, including lemur. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
lemur PyPI | All versions | 0.1.5 |
lemur PyPI | All versions | 0.1.5 |
lemur PyPI | All versions | 0.2.1 |
Products include Netflix Lemur.
How do I fix CVE-2015-7764?
Upgrade lemur to a fixed version for your release line: 0.1.5 or 0.2.1.
Is CVE-2015-7764 being exploited?
There is no known exploitation of CVE-2015-7764 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as GHSA-chg9-3c3p-ch23, PYSEC-2017-50.