# CVE-2020-13579: Integer overflow in Softmaker Software

> An attacker can execute arbitrary code by tricking a user into opening a specially crafted document in SoftMaker Office PlanMaker.

- **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-9rhj-8q3f-7x84

## What is CVE-2020-13579?

CVE-2020-13579 is a high-severity 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 integer 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 perform arithmetic that may overflow which can result in an undersized heap allocation. Later when copying data from the file into this allocation, a heap-based buffer overflow will occur which can corrupt memory. These types of memory corruptions can allow for 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), CWE-190 (Integer Overflow or Wraparound)

## Which versions are affected by CVE-2020-13579?

It affects 1 product.


Products: Softmaker Planmaker 2021.

## How do I fix CVE-2020-13579?

No fix has been published for CVE-2020-13579 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-13579 being exploited?

There is no known exploitation of CVE-2020-13579 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-2020-13580](https://insights.sbomify.com/CVE-2020-13580/): Memory corruption 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-2020-13579 and fix it if it is affected.

What it is: CVE-2020-13579 is a high-severity 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-2020-13579 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-2020-13579/ (Markdown: https://insights.sbomify.com/CVE-2020-13579/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-13579
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-13579
- OSV: https://osv.dev/vulnerability/CVE-2020-13579

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From sbomify Insights: https://insights.sbomify.com/CVE-2020-13579/
Summaries are generated and may contain mistakes; the official description above is the record.