# CVE-2019-6590: Denial of service in BIG-IP (LTM)

> Attackers can cause excessive resource consumption in TMM via SSL Session ID Persistence traffic, leading to denial of service on BIG-IP LTM devices.

- **Severity:** Medium 5.9 (`CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 5 Feb 2019
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-9652-xrw4-5wc5

## What is CVE-2019-6590?

CVE-2019-6590 is a medium-severity denial of service vulnerability in F5 Big-Ip Local Traffic Manager, published on 5 Feb 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

On BIG-IP LTM 13.0.0 to 13.0.1 and 12.1.0 to 12.1.3.6, under certain conditions, the TMM may consume excessive resources when processing SSL Session ID Persistence traffic.

## Which versions are affected by CVE-2019-6590?

It affects 1 product.


Products: F5 Big-Ip Local Traffic Manager.

## How do I fix CVE-2019-6590?

No fix has been published for CVE-2019-6590 yet. Limit exposure of the affected software until one is available.

## Is CVE-2019-6590 being exploited?

There is no known exploitation of CVE-2019-6590 in the wild and no public exploit code.

## Other vulnerabilities in F5 Big-Ip Local Traffic Manager

- [CVE-2016-5745](https://insights.sbomify.com/CVE-2016-5745/): Missing authorization in n/a (critical 9.8)
- [CVE-2020-5936](https://insights.sbomify.com/CVE-2020-5936/): Denial of service in BIG-IP LTM (high 7.5)
- [CVE-2019-6681](https://insights.sbomify.com/CVE-2019-6681/): Denial of service in BIG-IP (high 7.5)
- [CVE-2018-17539](https://insights.sbomify.com/CVE-2018-17539/): Denial of service in n/a (high 7.5)
- [CVE-2014-8727](https://insights.sbomify.com/CVE-2014-8727/): Path traversal in n/a (medium 6.2)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-6590 and fix it if it is affected.

What it is: CVE-2019-6590 is a medium-severity denial of service vulnerability in F5 Big-Ip Local Traffic Manager, published on 5 Feb 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 CVE-2019-6590 in the wild and no public exploit code.

Affected product: F5 Big-Ip Local Traffic Manager. 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-2019-6590/ (Markdown: https://insights.sbomify.com/CVE-2019-6590/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-6590
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-6590
- OSV: https://osv.dev/vulnerability/CVE-2019-6590

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-6590/
Summaries are generated and may contain mistakes; the official description above is the record.