# CVE-2009-4420: Memory corruption in n/a

> Remote attackers can cause a denial of service in F5 BIG-IP ASM and PSM via a buffer overflow in the bd daemon.

- **Severity:** High 7.8 (`AV:N/AC:L/Au:N/C:N/I:N/A:C`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 24 Dec 2009
- **Updated:** 7 Aug 2024
- **Also known as:** GHSA-jggw-46hj-wcq8

## What is CVE-2009-4420?

CVE-2009-4420 is a high-severity memory corruption vulnerability in F5 Big-Ip Application Security Manager, published on 24 Dec 2009. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Buffer overflow in the bd daemon in F5 Networks BIG-IP Application Security Manager (ASM) 9.4.4 through 9.4.7 and 10.0.0 through 10.0.1, and Protocol Security Manager (PSM) 9.4.5 through 9.4.7 and 10.0.0 through 10.0.1, allows remote attackers to cause a denial of service (crash) via unknown vectors.  NOTE: some of these details are obtained from third party information.

Weakness: CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer)

## Which versions are affected by CVE-2009-4420?

It affects 3 products.


Products: F5 Big-Ip Application Security Manager, F5 Big-Ip Protocol Security Manager, F5 Big-Ip Protocol Security Module.

## How do I fix CVE-2009-4420?

No fix has been published for CVE-2009-4420 yet. Limit exposure of the affected software until one is available.

## Is CVE-2009-4420 being exploited?

There is no known exploitation of CVE-2009-4420 in the wild and no public exploit code.

## Other vulnerabilities in F5 Big-Ip Application Security Manager

- [CVE-2019-6665](https://insights.sbomify.com/CVE-2019-6665/): Other in BIG-IP ASM (critical 9.4)
- [CVE-2019-6650](https://insights.sbomify.com/CVE-2019-6650/): Information disclosure in BIG-IP ASM (critical 9.1)
- [CVE-2025-24326](https://insights.sbomify.com/CVE-2025-24326/): BIG-IP Advanced WAF/ASM BADoS vulnerability (high 8.9)
- [CVE-2025-55669](https://insights.sbomify.com/CVE-2025-55669/): BIG-IP HTTP/2 vulnerability (high 8.7)
- [CVE-2021-23010](https://insights.sbomify.com/CVE-2021-23010/): Denial of service in BIG-IP ASM/Advanced WAF (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2009-4420 and fix it if it is affected.

What it is: CVE-2009-4420 is a high-severity memory corruption vulnerability in F5 Big-Ip Application Security Manager, published on 24 Dec 2009. 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-2009-4420 in the wild and no public exploit code.

Affected product: F5 Big-Ip Application Security 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-2009-4420/ (Markdown: https://insights.sbomify.com/CVE-2009-4420/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2009-4420
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2009-4420
- OSV: https://osv.dev/vulnerability/CVE-2009-4420

---
From sbomify Insights: https://insights.sbomify.com/CVE-2009-4420/
Summaries are generated and may contain mistakes; the official description above is the record.