# CVE-2023-43821: Memory corruption in DOPSoft

> A stack-based buffer overflow in DOPSoft allows remote code execution when a user opens a malicious DPS file.

- **Severity:** High 8.8 (`CVSS:3.1/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:** 18 Jan 2024
- **Updated:** 21 Oct 2024
- **Also known as:** GHSA-vh2f-9g4r-xhjf

## What is CVE-2023-43821?

CVE-2023-43821 is a high-severity memory corruption vulnerability in Delta Electronics DOPSoft, published on 18 Jan 2024. 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

A stack based buffer overflow exists in Delta Electronics Delta Industrial Automation DOPSoft when parsing the wLogTitlesActionLen field of a DPS file. A remote, unauthenticated attacker can exploit this vulnerability by enticing a user to open a specially crafted DPS file to achieve remote code execution.

Weakness: CWE-120 (Buffer Copy without Checking Size of Input), CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer)

## Which versions are affected by CVE-2023-43821?

It affects 1 product.


Products: Deltaww Dopsoft.

## How do I fix CVE-2023-43821?

No fix has been published for CVE-2023-43821 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-43821 being exploited?

There is no known exploitation of CVE-2023-43821 in the wild and no public exploit code.

## Other vulnerabilities in Delta Electronics DOPSoft

- [CVE-2021-38406](https://insights.sbomify.com/CVE-2021-38406/): Delta Electronics DOPSoft 2 Improper Input Validation (high 7.8, exploited in the wild)
- [CVE-2023-43818](https://insights.sbomify.com/CVE-2023-43818/): Delta Electronics Delta Industrial Automation DOPSoft DPS File wTextLen Buffer Overflow Remote Code Execution (high 8.8)
- [CVE-2023-43819](https://insights.sbomify.com/CVE-2023-43819/): Delta Electronics Delta Industrial Automation DOPSoft DPS File InitialMacroLen Buffer Overflow Remote Code Execution (high 8.8)
- [CVE-2023-43820](https://insights.sbomify.com/CVE-2023-43820/): Memory corruption in DOPSoft (high 8.8)
- [CVE-2023-43822](https://insights.sbomify.com/CVE-2023-43822/): Delta Electronics Delta Industrial Automation DOPSoft DPS File wLogTitlesTimeLen Buffer Overflow Remote Code Execution (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-43821 and fix it if it is affected.

What it is: CVE-2023-43821 is a high-severity memory corruption vulnerability in Delta Electronics DOPSoft, published on 18 Jan 2024. 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-2023-43821 in the wild and no public exploit code.

Affected product: Delta Electronics DOPSoft. 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-2023-43821/ (Markdown: https://insights.sbomify.com/CVE-2023-43821/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-43821
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-43821
- OSV: https://osv.dev/vulnerability/CVE-2023-43821

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From sbomify Insights: https://insights.sbomify.com/CVE-2023-43821/
Summaries are generated and may contain mistakes; the official description above is the record.