# CVE-2023-5594: Improper following of a certificate's chain of trust in ESET security products

> Attackers can bypass secure traffic scanning by using certificates signed with weak MD5 or SHA1 algorithms, requiring users to update ESET products.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 21 Dec 2023
- **Updated:** 2 Aug 2024
- **Also known as:** GHSA-4mwg-64w4-5g5m

## What is CVE-2023-5594?

CVE-2023-5594 is a high-severity vulnerability in ESET, spol. s r.o. ESET Endpoint Antivirus, published on 21 Dec 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Improper validation of the server’s certificate chain in secure traffic scanning feature considered intermediate certificate signed using the MD5 or SHA1 algorithm as trusted.

Weakness: CWE-295 (Improper Certificate Validation)

## Which versions are affected by CVE-2023-5594?

It affects 9 products.


Products: Eset Endpoint Antivirus, Eset Endpoint Security, Eset File Security, Eset Internet Security, Eset Mail Security, Eset Nod32 Antivirus, Eset Security, Eset Server Security, Eset Smart Security.

## How do I fix CVE-2023-5594?

No fix has been published for CVE-2023-5594 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-5594 being exploited?

There is no known exploitation of CVE-2023-5594 in the wild and no public exploit code.

## Other vulnerabilities in ESET, spol. s r.o. ESET Endpoint Antivirus

- [CVE-2024-0353](https://insights.sbomify.com/CVE-2024-0353/): Local privilege escalation in Windows products (high 7.8)
- [CVE-2023-3160](https://insights.sbomify.com/CVE-2023-3160/): Local privilege escalation in security products for Windows (high 7.8)
- [CVE-2021-37852](https://insights.sbomify.com/CVE-2021-37852/): LPE in ESET products for Windows (high 7.8)
- [CVE-2021-37851](https://insights.sbomify.com/CVE-2021-37851/): Local Privilege Escalation in ESET product for Windows (high 7.3)
- [CVE-2022-27167](https://insights.sbomify.com/CVE-2022-27167/): Arbitrary File Deletion in ESET products for Windows (high 7.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-5594 and fix it if it is affected.

What it is: CVE-2023-5594 is a high-severity vulnerability in ESET, spol. s r.o. ESET Endpoint Antivirus, published on 21 Dec 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2023-5594 in the wild and no public exploit code.

Affected product: ESET, spol. s r.o. ESET Endpoint 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-2023-5594/ (Markdown: https://insights.sbomify.com/CVE-2023-5594/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-5594
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-5594
- OSV: https://osv.dev/vulnerability/CVE-2023-5594

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-5594/
Summaries are generated and may contain mistakes; the official description above is the record.