# CVE-2017-2101: Auth bypass in Hands-on Vulnerability Learning Tool "AppGoat" for Web Application

> Remote attackers can bypass authentication in the AppGoat training tool to perform arbitrary operations, requiring an upgrade to secure the application.

- **Severity:** High 7.3 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 28 Apr 2017
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-p6v9-pf62-jj8w

## What is CVE-2017-2101?

CVE-2017-2101 is a high-severity authentication bypass vulnerability in INFORMATION-TECHNOLOGY PROMOTION AGENCY, JAPAN (IPA) Hands-on Vulnerability Learning Tool "AppGoat" for Web Application, published on 28 Apr 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Hands-on Vulnerability Learning Tool "AppGoat" for Web Application V3.0.0 and earlier allows remote attackers to bypass authentication to perform arbitrary operations via unspecified vectors.

Weakness: CWE-287 (Improper Authentication)

## Which versions are affected by CVE-2017-2101?

It affects 1 product.


Products: Ipa Appgoat.

## How do I fix CVE-2017-2101?

No fix has been published for CVE-2017-2101 yet. Limit exposure of the affected software until one is available.

## Is CVE-2017-2101 being exploited?

There is no known exploitation of CVE-2017-2101 in the wild and no public exploit code.

## Other vulnerabilities in INFORMATION-TECHNOLOGY PROMOTION AGENCY, JAPAN (IPA) Hands-on Vulnerability Learning Tool "AppGoat" for Web Application

- [CVE-2017-2179](https://insights.sbomify.com/CVE-2017-2179/): Code injection in Hands-on Vulnerability Learning Tool "AppGoat" for Web Application (high 8.8)
- [CVE-2017-2181](https://insights.sbomify.com/CVE-2017-2181/): Path traversal in Hands-on Vulnerability Learning Tool "AppGoat" for Web Application (high 8.8)
- [CVE-2017-2182](https://insights.sbomify.com/CVE-2017-2182/): Path traversal in Hands-on Vulnerability Learning Tool "AppGoat" for Web Application (high 8.8)
- [CVE-2017-2102](https://insights.sbomify.com/CVE-2017-2102/): Cross-site request forgery in Hands-on Vulnerability Learning Tool "AppGoat" for Web Application (high 8.8)
- [CVE-2017-2099](https://insights.sbomify.com/CVE-2017-2099/): Code injection in Hands-on Vulnerability Learning Tool "AppGoat" for Web Application (medium 6.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2017-2101 and fix it if it is affected.

What it is: CVE-2017-2101 is a high-severity authentication bypass vulnerability in INFORMATION-TECHNOLOGY PROMOTION AGENCY, JAPAN (IPA) Hands-on Vulnerability Learning Tool "AppGoat" for Web Application, published on 28 Apr 2017. 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-2017-2101 in the wild and no public exploit code.

Affected product: INFORMATION-TECHNOLOGY PROMOTION AGENCY, JAPAN (IPA) Hands-on Vulnerability Learning Tool "AppGoat" for Web Application. 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-2017-2101/ (Markdown: https://insights.sbomify.com/CVE-2017-2101/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2017-2101
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2017-2101
- OSV: https://osv.dev/vulnerability/CVE-2017-2101

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From sbomify Insights: https://insights.sbomify.com/CVE-2017-2101/
Summaries are generated and may contain mistakes; the official description above is the record.