# CVE-2021-39196: Authenticated non-privileged user can request unfiltered data without adequate permissions in pcapture

> Authenticated non-privileged users can bypass capture filters to download all network traffic, exposing sensitive data.

- **Severity:** High 7.7 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 7 Sep 2021
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-3r67-fxpr-p2qx

## What is CVE-2021-39196?

CVE-2021-39196 is a high-severity missing authorization vulnerability in jdhwpgmbca pcapture, published on 7 Sep 2021. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

pcapture is an open source dumpcap web service interface . In affected versions this vulnerability allows an authenticated but unprivileged user to use the REST API to capture and download packets with no capture filter and without adequate permissions. This is important because the capture filters can effectively limit the scope of information that a user can see in the data captures. If no filter is present, then all data on the local network segment where the program is running can be captured and downloaded. v3.12 fixes this problem. There is no workaround, you must upgrade to v3.12 or greater.

Weakness: CWE-754 (Improper Check for Unusual or Exceptional Conditions), CWE-287 (Improper Authentication)

## Which versions are affected by CVE-2021-39196?

It affects 1 product.


Products: Pcapture Project Pcapture.

## How do I fix CVE-2021-39196?

No fix has been published for CVE-2021-39196 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-39196 being exploited?

There is no known exploitation of CVE-2021-39196 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-39196 and fix it if it is affected.

What it is: CVE-2021-39196 is a high-severity missing authorization vulnerability in jdhwpgmbca pcapture, published on 7 Sep 2021. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2021-39196 in the wild and no public exploit code.

Affected product: jdhwpgmbca pcapture. 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-2021-39196/ (Markdown: https://insights.sbomify.com/CVE-2021-39196/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-39196
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-39196
- OSV: https://osv.dev/vulnerability/CVE-2021-39196

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-39196/
Summaries are generated and may contain mistakes; the official description above is the record.