# CVE-2021-21807: Integer overflow in Accusoft

> An integer overflow in Accusoft ImageGear allows attackers to execute arbitrary code via a specially crafted DICOM file.

- **Severity:** Critical 9.8 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 7 Jul 2021
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-cvc7-ph4x-j6mp

## What is CVE-2021-21807?

CVE-2021-21807 is a critical vulnerability in Accusoft Imagegear, published on 7 Jul 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

An integer overflow vulnerability exists in the DICOM parse_dicom_meta_info functionality of Accusoft ImageGear 19.9. A specially crafted malformed file can lead to a stack-based buffer overflow. An attacker can provide a malicious file to trigger this vulnerability.

Weakness: CWE-190 (Integer Overflow or Wraparound)

## Which versions are affected by CVE-2021-21807?

It affects 1 product.


Products: Accusoft Imagegear.

## How do I fix CVE-2021-21807?

No fix has been published for CVE-2021-21807 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-21807 being exploited?

There is no known exploitation of CVE-2021-21807 in the wild and no public exploit code.

## Other vulnerabilities in Accusoft Imagegear

- [CVE-2023-32653](https://insights.sbomify.com/CVE-2023-32653/): Memory corruption in ImageGear (critical 9.8)
- [CVE-2023-35002](https://insights.sbomify.com/CVE-2023-35002/): Memory corruption in ImageGear (critical 9.8)
- [CVE-2023-39453](https://insights.sbomify.com/CVE-2023-39453/): Use after free in ImageGear (critical 9.8)
- [CVE-2023-40163](https://insights.sbomify.com/CVE-2023-40163/): Memory corruption in ImageGear (critical 9.8)
- [CVE-2022-32588](https://insights.sbomify.com/CVE-2022-32588/): Memory corruption in ImageGear (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-21807 and fix it if it is affected.

What it is: CVE-2021-21807 is a critical vulnerability in Accusoft Imagegear, published on 7 Jul 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-2021-21807 in the wild and no public exploit code.

Affected product: Accusoft Imagegear. 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-2021-21807/ (Markdown: https://insights.sbomify.com/CVE-2021-21807/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-21807
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-21807
- OSV: https://osv.dev/vulnerability/CVE-2021-21807

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-21807/
Summaries are generated and may contain mistakes; the official description above is the record.