# CVE-2023-0857: Auth bypass in Canon Office/Small Office Multifunction Printers and Laser Printers

> Network attackers can gain unauthorized administrative access to Canon printers due to settings changes during initial registration.

- **Severity:** Medium 5.9 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 11 May 2023
- **Updated:** 24 Jan 2025
- **Also known as:** GHSA-p555-r2hc-6428

## What is CVE-2023-0857?

CVE-2023-0857 is a medium-severity authentication bypass vulnerability in Canon Office/Small Office Multifunction Printers and Laser Printers, published on 11 May 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Unintentional change of settings during initial registration of system administrators which uses control protocols. The affected Office / Small Office Multifunction Printers and Laser Printers(*) may allow an attacker on the network segment to trigger unauthorized access to the product. *:Satera LBP660C Series/LBP620C Series/MF740C Series/MF640C Series firmware Ver.11.04 and earlier sold in Japan. Color imageCLASS LBP660C Series/LBP 620C Series/X LBP1127C/MF740C Series/MF640C Series/X MF1127C firmware Ver.11.04 and earlier sold in US. i-SENSYS LBP660C Series/LBP620C Series/MF740C Series/MF640C Series, C1127P, C1127iF, C1127i firmware Ver.11.04 and earlier sold in Europe.

Weakness: CWE-286 (Incorrect User Management)

## Which versions are affected by CVE-2023-0857?

It affects 45 products.


Products: Canon I-Sensys Lbp621cw Firmware, Canon I-Sensys Lbp623cdw Firmware, Canon I-Sensys Lbp633cdw Firmware, Canon I-Sensys Lbp664cx Firmware, Canon I-Sensys Mf641cw Firmware, Canon I-Sensys Mf643cdw Firmware, Canon I-Sensys Mf645cx Firmware, Canon I-Sensys Mf742cdw Firmware, Canon I-Sensys Mf744cdw Firmware, Canon I-Sensys Mf746cx Firmware, Canon I-Sensys X C1127i Firmware, Canon I-Sensys X C1127if Firmware, Canon I-Sensys X C1127p Firmware, Canon Imageprograf Tc-20 Firmware, Canon Imageprograf Tc-20m Firmware, Canon Lbp1127c Firmware, Canon Lbp122dw Firmware, Canon Lbp621c Firmware, Canon Lbp622c Firmware, Canon Lbp622cdw Firmware and 25 more.

## How do I fix CVE-2023-0857?

No fix has been published for CVE-2023-0857 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-0857 being exploited?

There is no known exploitation of CVE-2023-0857 in the wild and no public exploit code.

## Other vulnerabilities in Canon Office/Small Office Multifunction Printers and Laser Printers

- [CVE-2023-0851](https://insights.sbomify.com/CVE-2023-0851/): Memory corruption in Canon Office/Small Office Multifunction Printers and Laser Printers (critical 9.8)
- [CVE-2023-0852](https://insights.sbomify.com/CVE-2023-0852/): Memory corruption in Canon Office/Small Office Multifunction Printers and Laser Printers (critical 9.8)
- [CVE-2023-0853](https://insights.sbomify.com/CVE-2023-0853/): Memory corruption in Canon Office/Small Office Multifunction Printers and Laser Printers (critical 9.8)
- [CVE-2023-0854](https://insights.sbomify.com/CVE-2023-0854/): Memory corruption in Canon Office/Small Office Multifunction Printers and Laser Printers (critical 9.8)
- [CVE-2023-0855](https://insights.sbomify.com/CVE-2023-0855/): Memory corruption in Canon Office/Small Office Multifunction Printers and Laser Printers (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-0857 and fix it if it is affected.

What it is: CVE-2023-0857 is a medium-severity authentication bypass vulnerability in Canon Office/Small Office Multifunction Printers and Laser Printers, published on 11 May 2023. 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-2023-0857 in the wild and no public exploit code.

Affected product: Canon Office/Small Office Multifunction Printers and Laser Printers. 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-2023-0857/ (Markdown: https://insights.sbomify.com/CVE-2023-0857/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-0857
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-0857
- OSV: https://osv.dev/vulnerability/CVE-2023-0857

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From sbomify Insights: https://insights.sbomify.com/CVE-2023-0857/
Summaries are generated and may contain mistakes; the official description above is the record.