# CVE-2020-7828: DaviewIndy Heap-based Buffer Overflow Vulnerability

> Attackers can execute arbitrary code by tricking users into opening a malformed file in DaviewIndy, requiring an upgrade to mitigate.

- **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:** 30 Jul 2020
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-946x-5j76-f99g

## What is CVE-2020-7828?

CVE-2020-7828 is a high-severity memory corruption vulnerability in HumanTalk DavieIndy, published on 30 Jul 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

DaviewIndy 8.98.4 and earlier version contain Heap-based overflow vulnerability, triggered when the user opens a malformed specific file that is mishandled by Daview.exe. Attackers could exploit this and arbitrary code execution.

Weakness: CWE-787 (Out-of-bounds Write), CWE-122 (Heap-based Buffer Overflow)

## Which versions are affected by CVE-2020-7828?

It affects 1 product.


Products: Hmtalk Daviewindy.

## How do I fix CVE-2020-7828?

No fix has been published for CVE-2020-7828 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-7828 being exploited?

There is no known exploitation of CVE-2020-7828 in the wild and no public exploit code.

## Other vulnerabilities in HumanTalk DavieIndy

- [CVE-2020-7872](https://insights.sbomify.com/CVE-2020-7872/): Integer overflow in DaviewIndy (high 7.8)
- [CVE-2020-7852](https://insights.sbomify.com/CVE-2020-7852/): DaviewIndy Heap Overflow Vulnerabilities (high 7.8)
- [CVE-2020-7822](https://insights.sbomify.com/CVE-2020-7822/): DaviewIndy Multiple Vulnerabilities (high 7.8)
- [CVE-2020-7823](https://insights.sbomify.com/CVE-2020-7823/): DaviewIndy Multiple Vulnerabilities (high 7.8)
- [CVE-2020-7827](https://insights.sbomify.com/CVE-2020-7827/): DaviewIndy Use-After-Free Vulnerability (high 7.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-7828 and fix it if it is affected.

What it is: CVE-2020-7828 is a high-severity memory corruption vulnerability in HumanTalk DavieIndy, published on 30 Jul 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-2020-7828 in the wild and no public exploit code.

Affected product: HumanTalk DavieIndy. 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-2020-7828/ (Markdown: https://insights.sbomify.com/CVE-2020-7828/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-7828
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-7828
- OSV: https://osv.dev/vulnerability/CVE-2020-7828

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-7828/
Summaries are generated and may contain mistakes; the official description above is the record.