# CVE-2006-5794: Auth bypass in n/a

> Weak verification in OpenSSH Privilege Separation Monitor may allow attackers to bypass authentication, though exploitation requires leveraging other unprivileged process vulnerabilities.

- **Severity:** High 7.5 (`AV:N/AC:L/Au:N/C:P/I:P/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:** 8 Nov 2006
- **Updated:** 7 Aug 2024
- **Also known as:** DEBIAN-CVE-2006-5794, GHSA-5r9x-42xj-4x3r, RHSA-2006:0738

## What is CVE-2006-5794?

CVE-2006-5794 is a high-severity authentication bypass vulnerability in OpenSSH, published on 8 Nov 2006. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Unspecified vulnerability in the sshd Privilege Separation Monitor in OpenSSH before 4.5 causes weaker verification that authentication has been successful, which might allow attackers to bypass authentication. NOTE: as of 20061108, it is believed that this issue is only exploitable by leveraging vulnerabilities in the unprivileged process, which are not known to exist.

## Which versions are affected by CVE-2006-5794?

It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `openssh` | Red Hat:enterprise_linux:3::as | All versions | 0:3.6.1p2-33.30.13 |
| `openssh-askpass` | Red Hat:enterprise_linux:3::as | All versions | 0:3.6.1p2-33.30.13 |
| `openssh-askpass-gnome` | Red Hat:enterprise_linux:3::as | All versions | 0:3.6.1p2-33.30.13 |
| `openssh-clients` | Red Hat:enterprise_linux:3::as | All versions | 0:3.6.1p2-33.30.13 |
| `openssh-debuginfo` | Red Hat:enterprise_linux:3::as | All versions | 0:3.6.1p2-33.30.13 |
| `openssh-server` | Red Hat:enterprise_linux:3::as | All versions | 0:3.6.1p2-33.30.13 |
| `openssh` | Red Hat:enterprise_linux:3::desktop | All versions | 0:3.6.1p2-33.30.13 |
| `openssh-askpass` | Red Hat:enterprise_linux:3::desktop | All versions | 0:3.6.1p2-33.30.13 |
| `openssh-askpass-gnome` | Red Hat:enterprise_linux:3::desktop | All versions | 0:3.6.1p2-33.30.13 |
| `openssh-clients` | Red Hat:enterprise_linux:3::desktop | All versions | 0:3.6.1p2-33.30.13 |
| `openssh-debuginfo` | Red Hat:enterprise_linux:3::desktop | All versions | 0:3.6.1p2-33.30.13 |
| `openssh-server` | Red Hat:enterprise_linux:3::desktop | All versions | 0:3.6.1p2-33.30.13 |
| `openssh` | Red Hat:enterprise_linux:3::es | All versions | 0:3.6.1p2-33.30.13 |
| `openssh-askpass` | Red Hat:enterprise_linux:3::es | All versions | 0:3.6.1p2-33.30.13 |
| `openssh-askpass-gnome` | Red Hat:enterprise_linux:3::es | All versions | 0:3.6.1p2-33.30.13 |
| `openssh-clients` | Red Hat:enterprise_linux:3::es | All versions | 0:3.6.1p2-33.30.13 |
| `openssh-debuginfo` | Red Hat:enterprise_linux:3::es | All versions | 0:3.6.1p2-33.30.13 |
| `openssh-server` | Red Hat:enterprise_linux:3::es | All versions | 0:3.6.1p2-33.30.13 |
| `openssh` | Red Hat:enterprise_linux:3::ws | All versions | 0:3.6.1p2-33.30.13 |
| `openssh-askpass` | Red Hat:enterprise_linux:3::ws | All versions | 0:3.6.1p2-33.30.13 |
| `openssh-askpass-gnome` | Red Hat:enterprise_linux:3::ws | All versions | 0:3.6.1p2-33.30.13 |
| `openssh-clients` | Red Hat:enterprise_linux:3::ws | All versions | 0:3.6.1p2-33.30.13 |
| `openssh-debuginfo` | Red Hat:enterprise_linux:3::ws | All versions | 0:3.6.1p2-33.30.13 |
| `openssh-server` | Red Hat:enterprise_linux:3::ws | All versions | 0:3.6.1p2-33.30.13 |
| `openssh` | Red Hat:enterprise_linux:4::as | All versions | 0:3.9p1-8.RHEL4.17.1 |
| `openssh-askpass` | Red Hat:enterprise_linux:4::as | All versions | 0:3.9p1-8.RHEL4.17.1 |
| `openssh-askpass-gnome` | Red Hat:enterprise_linux:4::as | All versions | 0:3.9p1-8.RHEL4.17.1 |
| `openssh-clients` | Red Hat:enterprise_linux:4::as | All versions | 0:3.9p1-8.RHEL4.17.1 |
| `openssh-debuginfo` | Red Hat:enterprise_linux:4::as | All versions | 0:3.9p1-8.RHEL4.17.1 |
| `openssh-server` | Red Hat:enterprise_linux:4::as | All versions | 0:3.9p1-8.RHEL4.17.1 |
| `openssh` | Red Hat:enterprise_linux:4::desktop | All versions | 0:3.9p1-8.RHEL4.17.1 |
| `openssh-askpass` | Red Hat:enterprise_linux:4::desktop | All versions | 0:3.9p1-8.RHEL4.17.1 |
| `openssh-askpass-gnome` | Red Hat:enterprise_linux:4::desktop | All versions | 0:3.9p1-8.RHEL4.17.1 |
| `openssh-clients` | Red Hat:enterprise_linux:4::desktop | All versions | 0:3.9p1-8.RHEL4.17.1 |
| `openssh-debuginfo` | Red Hat:enterprise_linux:4::desktop | All versions | 0:3.9p1-8.RHEL4.17.1 |
| `openssh-server` | Red Hat:enterprise_linux:4::desktop | All versions | 0:3.9p1-8.RHEL4.17.1 |
| `openssh` | Red Hat:enterprise_linux:4::es | All versions | 0:3.9p1-8.RHEL4.17.1 |
| `openssh-askpass` | Red Hat:enterprise_linux:4::es | All versions | 0:3.9p1-8.RHEL4.17.1 |
| `openssh-askpass-gnome` | Red Hat:enterprise_linux:4::es | All versions | 0:3.9p1-8.RHEL4.17.1 |
| `openssh-clients` | Red Hat:enterprise_linux:4::es | All versions | 0:3.9p1-8.RHEL4.17.1 |

Products: OpenSSH.

## How do I fix CVE-2006-5794?

Upgrade to a fixed version.

## Is CVE-2006-5794 being exploited?

There is no known exploitation of CVE-2006-5794 in the wild and no public exploit code.

## Other vulnerabilities in OpenSSH

- [CVE-2003-0786](https://insights.sbomify.com/CVE-2003-0786/): Auth bypass in n/a (critical 10.0)
- [CVE-2003-0693](https://insights.sbomify.com/CVE-2003-0693/): Memory corruption in n/a (critical 10.0)
- [CVE-2002-0640](https://insights.sbomify.com/CVE-2002-0640/): Memory corruption in n/a (critical 10.0)
- [CVE-2001-0144](https://insights.sbomify.com/CVE-2001-0144/): Integer overflow in n/a (critical 10.0)
- [CVE-2000-0999](https://insights.sbomify.com/CVE-2000-0999/): Memory corruption in n/a (critical 10.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2006-5794 and fix it if it is affected.

What it is: CVE-2006-5794 is a high-severity authentication bypass vulnerability in OpenSSH, published on 8 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-2006-5794 in the wild and no public exploit code.

Affected product: OpenSSH. 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-2006-5794/ (Markdown: https://insights.sbomify.com/CVE-2006-5794/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2006-5794
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2006-5794
- OSV: https://osv.dev/vulnerability/CVE-2006-5794

---
From sbomify Insights: https://insights.sbomify.com/CVE-2006-5794/
Summaries are generated and may contain mistakes; the official description above is the record.