# CVE-2013-3945: Memory corruption in MrSID plugin

> Remote attackers can execute arbitrary code via a malicious nband tag in the MrSID plugin for IrfanView.

- **Severity:** High 7.8 (`CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`)
- **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:** 2 Jan 2020
- **Updated:** 6 Aug 2024
- **Also known as:** GHSA-j2q9-fp38-97q8

## What is CVE-2013-3945?

CVE-2013-3945 is a high-severity memory corruption vulnerability in IrfanView MrSID plugin, published on 2 Jan 2020. 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

The MrSID plugin (MrSID.dll) before 4.37 for IrfanView allows remote attackers to execute arbitrary code via a nband tag.

Weakness: CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2013-3945?

It affects 1 product.


Products: Extensis Mrsid.

## How do I fix CVE-2013-3945?

No fix has been published for CVE-2013-3945 yet. Limit exposure of the affected software until one is available.

## Is CVE-2013-3945 being exploited?

There is no known exploitation of CVE-2013-3945 in the wild and no public exploit code.

## Other vulnerabilities in IrfanView MrSID plugin

- [CVE-2013-3944](https://insights.sbomify.com/CVE-2013-3944/): Memory corruption in MrSID plugin (high 7.8)
- [CVE-2013-3946](https://insights.sbomify.com/CVE-2013-3946/): Memory corruption in MrSID plugin (high 7.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2013-3945 and fix it if it is affected.

What it is: CVE-2013-3945 is a high-severity memory corruption vulnerability in IrfanView MrSID plugin, published on 2 Jan 2020. 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-2013-3945 in the wild and no public exploit code.

Affected product: IrfanView MrSID plugin. 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-2013-3945/ (Markdown: https://insights.sbomify.com/CVE-2013-3945/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2013-3945
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2013-3945
- OSV: https://osv.dev/vulnerability/CVE-2013-3945

---
From sbomify Insights: https://insights.sbomify.com/CVE-2013-3945/
Summaries are generated and may contain mistakes; the official description above is the record.