# CVE-2006-5989: Memory corruption in n/a

> Remote attackers can cause a denial of service via a heap-based buffer overflow in the mod_auth_kerb module triggered by crafted Kerberos messages.

- **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:** 20 Nov 2006
- **Updated:** 7 Aug 2024
- **Also known as:** DSA-1247-1, GHSA-f5v5-ggh9-mj78, RHSA-2006:0746

## What is CVE-2006-5989?

CVE-2006-5989 is a medium-severity memory corruption vulnerability in n/a, published on 20 Nov 2006. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Off-by-one error in the der_get_oid function in mod_auth_kerb 5.0 allows remote attackers to cause a denial of service (crash) via a crafted Kerberos message that triggers a heap-based buffer overflow in the component array.

## Which versions are affected by CVE-2006-5989?

It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `mod_auth_kerb` | Red Hat:enterprise_linux:4::as | All versions | 0:5.0-1.3 |
| `mod_auth_kerb-debuginfo` | Red Hat:enterprise_linux:4::as | All versions | 0:5.0-1.3 |
| `mod_auth_kerb` | Red Hat:enterprise_linux:4::desktop | All versions | 0:5.0-1.3 |
| `mod_auth_kerb-debuginfo` | Red Hat:enterprise_linux:4::desktop | All versions | 0:5.0-1.3 |
| `mod_auth_kerb` | Red Hat:enterprise_linux:4::es | All versions | 0:5.0-1.3 |
| `mod_auth_kerb-debuginfo` | Red Hat:enterprise_linux:4::es | All versions | 0:5.0-1.3 |
| `mod_auth_kerb` | Red Hat:enterprise_linux:4::ws | All versions | 0:5.0-1.3 |
| `mod_auth_kerb-debuginfo` | Red Hat:enterprise_linux:4::ws | All versions | 0:5.0-1.3 |

Products: Mod Auth Kerb Mod Auth Kerb.

## How do I fix CVE-2006-5989?

Apply the vendor's patch.

## Is CVE-2006-5989 being exploited?

There is no known exploitation of CVE-2006-5989 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2006-5989 and fix it if it is affected.

What it is: CVE-2006-5989 is a medium-severity memory corruption vulnerability in n/a, published on 20 Nov 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-2006-5989 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-2006-5989/ (Markdown: https://insights.sbomify.com/CVE-2006-5989/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2006-5989
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2006-5989
- OSV: https://osv.dev/vulnerability/CVE-2006-5989

---
From sbomify Insights: https://insights.sbomify.com/CVE-2006-5989/
Summaries are generated and may contain mistakes; the official description above is the record.