# CVE-2020-13977: Code injection in n/a

> An attacker with administrative access can execute arbitrary code by modifying CGI configuration settings in Nagios.

- **Severity:** Medium 4.9 (`CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 9 Jun 2020
- **Updated:** 4 Aug 2024
- **Also known as:** DEBIAN-CVE-2020-13977, GHSA-c962-q9ch-7qhw, MGASA-2021-0209, UBUNTU-CVE-2020-13977

## What is CVE-2020-13977?

CVE-2020-13977 is a medium-severity code injection vulnerability in Fedoraproject Fedora, published on 9 Jun 2020. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

Nagios 4.4.5 allows an attacker, who already has administrative access to change the "URL for JSON CGIs" configuration setting, to modify the Alert Histogram and Trends code via crafted versions of the archivejson.cgi, objectjson.cgi, and statusjson.cgi files. NOTE: this vulnerability has been mistakenly associated with CVE-2020-1408.

Weakness: CWE-829 (Inclusion of Functionality from Untrusted Control Sphere)

## Which versions are affected by CVE-2020-13977?

It affects 2 products.


Products: Fedoraproject Fedora, Nagios Nagios.

## How do I fix CVE-2020-13977?

Apply the vendor's patch.

## Is CVE-2020-13977 being exploited?

There is no known exploitation of CVE-2020-13977 in the wild and no public exploit code.

## Other vulnerabilities in Fedoraproject Fedora

- [CVE-2024-4577](https://insights.sbomify.com/CVE-2024-4577/): PHP-CGI OS Command Injection (critical 9.8, exploited in the wild)
- [CVE-2021-39226](https://insights.sbomify.com/CVE-2021-39226/): Grafana Authentication Bypass (critical 9.8, exploited in the wild)
- [CVE-2019-5544](https://insights.sbomify.com/CVE-2019-5544/): VMware ESXi and Horizon DaaS OpenSLP Heap-Based Buffer Overflow (critical 9.8, exploited in the wild)
- [CVE-2024-4947](https://insights.sbomify.com/CVE-2024-4947/): Google Chromium V8 Type Confusion (critical 9.6, exploited in the wild)
- [CVE-2024-4671](https://insights.sbomify.com/CVE-2024-4671/): Google Chromium Visuals Use-After-Free (critical 9.6, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-13977 and fix it if it is affected.

What it is: CVE-2020-13977 is a medium-severity code injection vulnerability in Fedoraproject Fedora, published on 9 Jun 2020. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2020-13977 in the wild and no public exploit code.

Affected product: Fedoraproject Fedora. 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-2020-13977/ (Markdown: https://insights.sbomify.com/CVE-2020-13977/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-13977
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-13977
- OSV: https://osv.dev/vulnerability/CVE-2020-13977

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-13977/
Summaries are generated and may contain mistakes; the official description above is the record.