# CVE-2023-1900: Integer overflow in Avira Antivirus

> A local attacker can trigger an integer overflow in Avira's network protection, causing heap corruption and denial of service.

- **Severity:** High 7.8 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 19 Apr 2023
- **Updated:** 5 Feb 2025
- **Also known as:** GHSA-8c47-529w-9h8f

## What is CVE-2023-1900?

CVE-2023-1900 is a high-severity vulnerability in Avira Antivirus , published on 19 Apr 2023. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

A vulnerability within the Avira network protection feature allowed an attacker with local execution rights to cause an overflow. This could corrupt the data on the heap and lead to a denial-of-service situation. 
Issue was fixed with Endpointprotection.exe version 1.0.2303.633

Weakness: CWE-190 (Integer Overflow or Wraparound)

## Which versions are affected by CVE-2023-1900?

It affects 1 product.


Products: Avira Antivirus.

## How do I fix CVE-2023-1900?

No fix has been published for CVE-2023-1900 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-1900 being exploited?

There is no known exploitation of CVE-2023-1900 in the wild and no public exploit code.

## Other vulnerabilities in Avira Antivirus 

- [CVE-2020-12254](https://insights.sbomify.com/CVE-2020-12254/): Path traversal in n/a (high 7.8)
- [CVE-2016-10402](https://insights.sbomify.com/CVE-2016-10402/): Integer overflow in n/a (high 7.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-1900 and fix it if it is affected.

What it is: CVE-2023-1900 is a high-severity vulnerability in Avira Antivirus , published on 19 Apr 2023. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2023-1900 in the wild and no public exploit code.

Affected product: Avira Antivirus . 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-2023-1900/ (Markdown: https://insights.sbomify.com/CVE-2023-1900/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-1900
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-1900
- OSV: https://osv.dev/vulnerability/CVE-2023-1900

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-1900/
Summaries are generated and may contain mistakes; the official description above is the record.