# CVE-2017-3765: Auth bypass in Enterprise Network Operating System affecting Lenovo and IBM RackSwitch and BladeCenter Products

> An authentication bypass in Lenovo and IBM network switches allows attackers to gain admin-level access via serial, Telnet, SSH, or Web interfaces.

- **Severity:** High 7.0 (`CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 10 Jan 2018
- **Updated:** 17 Sep 2024
- **Also known as:** GHSA-6r95-2q8q-g3c2

## What is CVE-2017-3765?

CVE-2017-3765 is a high-severity authentication bypass vulnerability in Enterprise Network Operating System affecting Lenovo and IBM RackSwitch and BladeCenter Products, published on 10 Jan 2018. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

In Enterprise Networking Operating System (ENOS) in Lenovo and IBM RackSwitch and BladeCenter products, an authentication bypass known as "HP Backdoor" was discovered during a Lenovo security audit in the serial console, Telnet, SSH, and Web interfaces. This bypass mechanism can be accessed when performing local authentication under specific circumstances. If exploited, admin-level access to the switch is granted.

Weakness: CWE-287 (Improper Authentication)

## Which versions are affected by CVE-2017-3765?

It affects 1 product.


Products: Lenovo Enterprise Network Operating System.

## How do I fix CVE-2017-3765?

No fix has been published for CVE-2017-3765 yet. Limit exposure of the affected software until one is available.

## Is CVE-2017-3765 being exploited?

There is no known exploitation of CVE-2017-3765 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2017-3765 and fix it if it is affected.

What it is: CVE-2017-3765 is a high-severity authentication bypass vulnerability in Enterprise Network Operating System affecting Lenovo and IBM RackSwitch and BladeCenter Products, published on 10 Jan 2018. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2017-3765 in the wild and no public exploit code.

Affected product: Enterprise Network Operating System affecting Lenovo and IBM RackSwitch and BladeCenter Products. 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-2017-3765/ (Markdown: https://insights.sbomify.com/CVE-2017-3765/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2017-3765
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2017-3765
- OSV: https://osv.dev/vulnerability/CVE-2017-3765

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From sbomify Insights: https://insights.sbomify.com/CVE-2017-3765/
Summaries are generated and may contain mistakes; the official description above is the record.