# CVE-2018-3691: Weak cryptography in Integrated Performance Primitives Cryptography Library

> Attackers can exploit timing side-channels in Intel IPP Cryptography Library to potentially recover sensitive cryptographic keys.

- **Severity:** Medium 4.7 (`CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 5 Jun 2018
- **Updated:** 16 Sep 2024
- **Also known as:** CVE-2018-3617, GHSA-8774-h3c9-hphw

## What is CVE-2018-3691?

CVE-2018-3691 is a medium-severity vulnerability in Intel Corporation Integrated Performance Primitives Cryptography Library, published on 5 Jun 2018. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Some implementations in Intel Integrated Performance Primitives Cryptography Library before version 2018 U3.1 do not properly ensure constant execution time.

## Which versions are affected by CVE-2018-3691?

It affects 1 product.


Products: Intel Integrated Performance Primitives Cryptography.

## How do I fix CVE-2018-3691?

No fix has been published for CVE-2018-3691 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-3691 being exploited?

There is no known exploitation of CVE-2018-3691 in the wild and no public exploit code.

## Other vulnerabilities in Intel Corporation Integrated Performance Primitives Cryptography Library

- [CVE-2022-26083](https://insights.sbomify.com/CVE-2022-26083/): Weak cryptography in Intel(R) IPP Cryptography software library (high 7.5)
- [CVE-2021-33147](https://insights.sbomify.com/CVE-2021-33147/): Information disclosure in Intel(R) IPP Crypto library (medium 5.5)
- [CVE-2024-21784](https://insights.sbomify.com/CVE-2024-21784/): Privilege escalation in Intel(R) IPP Cryptography software (medium 5.4)
- [CVE-2022-37409](https://insights.sbomify.com/CVE-2022-37409/): Information disclosure in Intel(R) IPP Cryptography software (medium 4.7)
- [CVE-2022-41646](https://insights.sbomify.com/CVE-2022-41646/): Information disclosure in Intel(R) IPP Cryptography software (medium 4.7)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-3691 and fix it if it is affected.

What it is: CVE-2018-3691 is a medium-severity vulnerability in Intel Corporation Integrated Performance Primitives Cryptography Library, published on 5 Jun 2018. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2018-3691 in the wild and no public exploit code.

Affected product: Intel Corporation Integrated Performance Primitives Cryptography Library. No package-level version data is available, so check the vendor advisory linked from the reference page.

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-2018-3691/ (Markdown: https://insights.sbomify.com/CVE-2018-3691/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-3691
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-3691
- OSV: https://osv.dev/vulnerability/CVE-2018-3691

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-3691/
Summaries are generated and may contain mistakes; the official description above is the record.