# CVE-2020-13580: Memory corruption in Softmaker Software

> A heap-based buffer overflow in SoftMaker Office PlanMaker allows attackers to execute arbitrary code by tricking users into opening a specially crafted document.

- **Severity:** High 8.8 (`CVSS:3.0/AV:N/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:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 4 Feb 2021
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-r56q-wqp9-hrw3

## What is CVE-2020-13580?

CVE-2020-13580 is a high-severity memory corruption vulnerability in Softmaker Software, published on 4 Feb 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

An exploitable heap-based buffer overflow vulnerability exists in the PlanMaker document parsing functionality of SoftMaker Office 2021’s PlanMaker application. A specially crafted document can cause the document parser to explicitly trust a length from a particular record type and use it to write a 16-bit null relative to a buffer allocated on the stack. Due to a lack of bounds-checking on this value, this can allow an attacker to write to memory outside of the buffer and controllably corrupt memory. This can allow an attacker to earn code execution under the context of the application. An attacker can entice the victim to open a document to trigger this vulnerability.

Weakness: CWE-787 (Out-of-bounds Write)

## Which versions are affected by CVE-2020-13580?

It affects 1 product.


Products: Softmaker Planmaker 2021.

## How do I fix CVE-2020-13580?

No fix has been published for CVE-2020-13580 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-13580 being exploited?

There is no known exploitation of CVE-2020-13580 in the wild and no public exploit code.

## Other vulnerabilities in Softmaker Software

- [CVE-2020-28587](https://insights.sbomify.com/CVE-2020-28587/): Memory corruption in Softmaker (high 8.8)
- [CVE-2020-13581](https://insights.sbomify.com/CVE-2020-13581/): Memory corruption in SoftMaker (high 8.8)
- [CVE-2020-27250](https://insights.sbomify.com/CVE-2020-27250/): Memory corruption in SoftMaker (high 8.8)
- [CVE-2020-13579](https://insights.sbomify.com/CVE-2020-13579/): Integer overflow in Softmaker Software (high 8.8)
- [CVE-2020-13586](https://insights.sbomify.com/CVE-2020-13586/): Memory corruption in Softmaker (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-13580 and fix it if it is affected.

What it is: CVE-2020-13580 is a high-severity memory corruption vulnerability in Softmaker Software, published on 4 Feb 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-2020-13580 in the wild and no public exploit code.

Affected product: Softmaker Software. 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-2020-13580/ (Markdown: https://insights.sbomify.com/CVE-2020-13580/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-13580
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-13580
- OSV: https://osv.dev/vulnerability/CVE-2020-13580

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From sbomify Insights: https://insights.sbomify.com/CVE-2020-13580/
Summaries are generated and may contain mistakes; the official description above is the record.