# CVE-2021-28427: Memory corruption in n/a

> Local attackers can execute arbitrary code by tricking users into opening a crafted TIFF file in XNView.

- **Severity:** High 7.8 (`CVSS:3.1/AC:L/AV:L/A:H/C:H/I:H/PR:N/S:U/UI:R`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 11 Aug 2023
- **Updated:** 9 Oct 2024
- **Also known as:** GHSA-f7v7-77jr-jjqm

## What is CVE-2021-28427?

CVE-2021-28427 is a high-severity memory corruption vulnerability in Xnview Xnview, published on 11 Aug 2023. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

### Official description

Buffer Overflow vulnerability in XNView version 2.49.3, allows local attackers to execute arbitrary code via crafted TIFF file.

Weakness: CWE-120 (Buffer Copy without Checking Size of Input)

## Which versions are affected by CVE-2021-28427?

It affects 1 product.


Products: Xnview Xnview.

## How do I fix CVE-2021-28427?

No fix has been published for CVE-2021-28427 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-28427 being exploited?

There is no known exploitation of CVE-2021-28427 in the wild and no public exploit code.

## Other vulnerabilities in Xnview Xnview

- [CVE-2013-3492](https://insights.sbomify.com/CVE-2013-3492/): Memory corruption in XnView (critical 9.8)
- [CVE-2013-3493](https://insights.sbomify.com/CVE-2013-3493/): Integer overflow in XnView (critical 9.8)
- [CVE-2013-3941](https://insights.sbomify.com/CVE-2013-3941/): Memory corruption in XnView (critical 9.8)
- [CVE-2012-4988](https://insights.sbomify.com/CVE-2012-4988/): Memory corruption in n/a (critical 9.3)
- [CVE-2013-3938](https://insights.sbomify.com/CVE-2013-3938/): Integer overflow in n/a (critical 9.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-28427 and fix it if it is affected.

What it is: CVE-2021-28427 is a high-severity memory corruption vulnerability in Xnview Xnview, published on 11 Aug 2023. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2021-28427 in the wild and no public exploit code.

Affected product: Xnview Xnview. 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-2021-28427/ (Markdown: https://insights.sbomify.com/CVE-2021-28427/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-28427
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-28427
- OSV: https://osv.dev/vulnerability/CVE-2021-28427

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-28427/
Summaries are generated and may contain mistakes; the official description above is the record.