# CVE-2020-7831: Path traversal in Ebiz4u CViewer Object AxECM.dll

> Attacker can force victim to download malicious files via directory traversal, leading to code execution upon reboot.

- **Severity:** High 8.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 24 Aug 2020
- **Updated:** 17 Sep 2024
- **Also known as:** GHSA-57pw-qp4x-896h

## What is CVE-2020-7831?

CVE-2020-7831 is a high-severity path traversal vulnerability in INOGARD Ebiz4u CViewer Object AxECM.dll, published on 24 Aug 2020. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

A vulnerability in the web-based contract management service interface Ebiz4u of INOGARD could allow an victim user to download any file. The attacker is able to use startup menu directory via directory traversal for automatic execution. The victim user need to reboot, however.

Weakness: CWE-494 (Download of Code Without Integrity Check)

## Which versions are affected by CVE-2020-7831?

It affects 1 product.


Products: Inogard Ebiz4u.

## How do I fix CVE-2020-7831?

No fix has been published for CVE-2020-7831 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-7831 being exploited?

There is no known exploitation of CVE-2020-7831 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-7831 and fix it if it is affected.

What it is: CVE-2020-7831 is a high-severity path traversal vulnerability in INOGARD Ebiz4u CViewer Object AxECM.dll, published on 24 Aug 2020. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2020-7831 in the wild and no public exploit code.

Affected product: INOGARD Ebiz4u CViewer Object AxECM.dll. 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-2020-7831/ (Markdown: https://insights.sbomify.com/CVE-2020-7831/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-7831
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-7831
- OSV: https://osv.dev/vulnerability/CVE-2020-7831

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From sbomify Insights: https://insights.sbomify.com/CVE-2020-7831/
Summaries are generated and may contain mistakes; the official description above is the record.