# CVE-2021-21510: Open redirect in Integrated Dell Remote Access Controller (iDRAC)

> Remote attackers can inject Host headers to poison web caches or trigger redirections in Dell iDRAC8 devices.

- **Severity:** Medium 6.1 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 8 Mar 2021
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-xxm9-gr2r-5m67

## What is CVE-2021-21510?

CVE-2021-21510 is a medium-severity vulnerability in Integrated Dell Remote Access Controller (iDRAC), published on 8 Mar 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

Dell iDRAC8 versions prior to 2.75.100.75 contain a host header injection vulnerability. A remote unauthenticated attacker may potentially exploit this vulnerability by injecting arbitrary ‘Host’ header values to poison a web-cache or trigger redirections.

Weakness: CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component), CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2021-21510?

It affects 1 product.


Products: Dell Idrac8 Firmware.

## How do I fix CVE-2021-21510?

No fix has been published for CVE-2021-21510 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-21510 being exploited?

There is no known exploitation of CVE-2021-21510 in the wild and no public exploit code.

## Other vulnerabilities in Integrated Dell Remote Access Controller (iDRAC)

- [CVE-2022-34436](https://insights.sbomify.com/CVE-2022-34436/): Security feature bypass in Integrated Dell Remote Access Controller 8 (low 2.7)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-21510 and fix it if it is affected.

What it is: CVE-2021-21510 is a medium-severity vulnerability in Integrated Dell Remote Access Controller (iDRAC), published on 8 Mar 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2021-21510 in the wild and no public exploit code.

Affected product: Integrated Dell Remote Access Controller (iDRAC). 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-2021-21510/ (Markdown: https://insights.sbomify.com/CVE-2021-21510/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-21510
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-21510
- OSV: https://osv.dev/vulnerability/CVE-2021-21510

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-21510/
Summaries are generated and may contain mistakes; the official description above is the record.