# CVE-2006-3122: Denial of service in n/a

> Remote attackers can crash the ISC DHCP server by sending a malformed DHCPDISCOVER packet, causing a denial of service.

- **Severity:** Medium 5.0 (`AV:N/AC:L/Au:N/C:N/I:N/A:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 9 Aug 2006
- **Updated:** 7 Aug 2024
- **Also known as:** DSA-1143-1, GHSA-jgmg-r2qf-hx4v

## What is CVE-2006-3122?

CVE-2006-3122 is a medium-severity denial of service vulnerability in n/a, published on 9 Aug 2006. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The supersede_lease function in memory.c in ISC DHCP (dhcpd) server 2.0pl5 allows remote attackers to cause a denial of service (application crash) via a DHCPDISCOVER packet with a 32 byte client-identifier, which causes the packet to be interpreted as a corrupt uid and causes the server to exit with "corrupt lease uid."

Weakness: CWE-399

## Which versions are affected by CVE-2006-3122?

It affects 1 product.


Products: Isc Dhcpd.

## How do I fix CVE-2006-3122?

Apply the vendor's patch.

## Is CVE-2006-3122 being exploited?

There is no known exploitation of CVE-2006-3122 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2004-1006](https://insights.sbomify.com/CVE-2004-1006/): Code injection in n/a (critical 10.0)
- [CVE-2002-0702](https://insights.sbomify.com/CVE-2002-0702/): Code injection in n/a (critical 10.0)
- [CVE-2003-0026](https://insights.sbomify.com/CVE-2003-0026/): Memory corruption in n/a (high 7.5)
- [CVE-2019-6470](https://insights.sbomify.com/CVE-2019-6470/): dhcpd: use-after-free error leads crash in IPv6 mode when using mismatched BIND libraries (medium 6.5)
- [CVE-2003-0039](https://insights.sbomify.com/CVE-2003-0039/): Denial of service in n/a (medium 5.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2006-3122 and fix it if it is affected.

What it is: CVE-2006-3122 is a medium-severity denial of service vulnerability in n/a, published on 9 Aug 2006. 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-2006-3122 in the wild and no public exploit code.

Affected product: n/a. 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-2006-3122/ (Markdown: https://insights.sbomify.com/CVE-2006-3122/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2006-3122
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2006-3122
- OSV: https://osv.dev/vulnerability/CVE-2006-3122

---
From sbomify Insights: https://insights.sbomify.com/CVE-2006-3122/
Summaries are generated and may contain mistakes; the official description above is the record.