# CVE-2018-17539: Denial of service in n/a

> Remote attackers can cause a denial of service in IP Infusion ZebOS and OcNOS BGP daemons by sending AS paths with eight or more elements.

- **Severity:** High 7.5 (`CVSS:3.0/AV:N/AC:L/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:** 28 Dec 2018
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-j437-j3mv-3fq3

## What is CVE-2018-17539?

CVE-2018-17539 is a high-severity denial of service vulnerability in F5 Big-Ip Local Traffic Manager, published on 28 Dec 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The BGP daemon (bgpd) in all IP Infusion ZebOS versions to 7.10.6 and all OcNOS versions to 1.3.3.145 allow remote attackers to cause a denial of service attack via an autonomous system (AS) path containing 8 or more autonomous system number (ASN) elements.

## Which versions are affected by CVE-2018-17539?

It affects 3 products.


Products: F5 Big-Ip Local Traffic Manager, Ipinfusion Ocnos, Ipinfusion Zebos.

## How do I fix CVE-2018-17539?

No fix has been published for CVE-2018-17539 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-17539 being exploited?

There is no known exploitation of CVE-2018-17539 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-2014-8727](https://insights.sbomify.com/CVE-2014-8727/): Path traversal in n/a (medium 6.2)
- [CVE-2019-6590](https://insights.sbomify.com/CVE-2019-6590/): Denial of service in BIG-IP (LTM) (medium 5.9)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-17539 and fix it if it is affected.

What it is: CVE-2018-17539 is a high-severity denial of service vulnerability in F5 Big-Ip Local Traffic Manager, published on 28 Dec 2018. 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-2018-17539 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-2018-17539/ (Markdown: https://insights.sbomify.com/CVE-2018-17539/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-17539
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-17539
- OSV: https://osv.dev/vulnerability/CVE-2018-17539

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-17539/
Summaries are generated and may contain mistakes; the official description above is the record.