# CVE-2021-27184: XML external entity in n/a

> An attacker can exploit an XML External Entity vulnerability in Pelco Digital Sentry Server to disclose and retrieve arbitrary data from the affected node.

- **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:** 11 Feb 2021
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-vfjj-7584-c34j

## What is CVE-2021-27184?

CVE-2021-27184 is a high-severity vulnerability in n/a, published on 11 Feb 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Pelco Digital Sentry Server 7.18.72.11464 has an XML External Entity vulnerability (exploitable via the DTD parameter entities technique), resulting in disclosure and retrieval of arbitrary data on the affected node via an out-of-band (OOB) attack. The vulnerability is triggered when input passed to the XML parser is not sanitized while parsing the ControlPointCacheShare.xml file (in a %APPDATA%\Pelco directory) when DSControlPoint.exe is executed.

Weakness: CWE-611 (Improper Restriction of XML External Entity Reference)

## Which versions are affected by CVE-2021-27184?

It affects 1 product.


Products: Pelco Digital Sentry Server.

## How do I fix CVE-2021-27184?

No fix has been published for CVE-2021-27184 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-27184 being exploited?

There is no known exploitation of CVE-2021-27184 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2021-27232](https://insights.sbomify.com/CVE-2021-27232/): Memory corruption in n/a (high 8.8)
- [CVE-2021-27197](https://insights.sbomify.com/CVE-2021-27197/): Path traversal in n/a (high 8.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-27184 and fix it if it is affected.

What it is: CVE-2021-27184 is a high-severity vulnerability in n/a, published on 11 Feb 2021. 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-2021-27184 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-2021-27184/ (Markdown: https://insights.sbomify.com/CVE-2021-27184/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-27184
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-27184
- OSV: https://osv.dev/vulnerability/CVE-2021-27184

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-27184/
Summaries are generated and may contain mistakes; the official description above is the record.