# CVE-2021-42797: Path traversal in n/a

> Unauthenticated attackers can exploit path traversal to steal Windows access tokens, enabling unauthorized data access and privilege escalation in AVEVA Edge.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/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:** 16 Dec 2023
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-4wwr-56pj-4v9h

## What is CVE-2021-42797?

CVE-2021-42797 is a high-severity path traversal vulnerability in n/a, published on 16 Dec 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Path traversal vulnerability in AVEVA Edge (formerly InduSoft Web Studio) versions R2020 and prior allows an unauthenticated user to steal the Windows access token of the user account configured for accessing external DB resources.

Weakness: CWE-22 (Improper Limitation of a Pathname to a Restricted Directory)

## Which versions are affected by CVE-2021-42797?

It affects 1 product.


Products: Aveva Edge.

## How do I fix CVE-2021-42797?

No fix has been published for CVE-2021-42797 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-42797 being exploited?

There is no known exploitation of CVE-2021-42797 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2021-42796](https://insights.sbomify.com/CVE-2021-42796/): Command injection in n/a (critical 9.8)
- [CVE-2018-17914](https://insights.sbomify.com/CVE-2018-17914/): Auth bypass in InduSoft Web Studio, and InTouch Edge HMI (formerly InTouch Machine Edition) (critical 9.8)
- [CVE-2018-17916](https://insights.sbomify.com/CVE-2018-17916/): Memory corruption in InduSoft Web Studio, and InTouch Edge HMI (formerly InTouch Machine Edition) (critical 9.8)
- [CVE-2021-42794](https://insights.sbomify.com/CVE-2021-42794/): Server-side request forgery in n/a (medium 5.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-42797 and fix it if it is affected.

What it is: CVE-2021-42797 is a high-severity path traversal vulnerability in n/a, published on 16 Dec 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-2021-42797 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-2021-42797/ (Markdown: https://insights.sbomify.com/CVE-2021-42797/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-42797
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-42797
- OSV: https://osv.dev/vulnerability/CVE-2021-42797

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-42797/
Summaries are generated and may contain mistakes; the official description above is the record.