Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Eurosoft-Uk | Uefi Bootloader | < 2022-06-01 |
| Redhat | Enterprise Linux | 7.0 |
| Microsoft | Windows 10 | - |
| Microsoft | Windows 11 | - |
| Microsoft | Windows 8.1 | - |
| Microsoft | Windows Rt 8.1 | - |
| Microsoft | Windows Server 2012 | - |
| Microsoft | Windows Server 2016 | - |
| Microsoft | Windows Server 2019 | - |
| Microsoft | Windows Server 2022 | - |
References
- https://edk2-docs.gitbook.io/understanding-the-uefi-secure-boot-chain/secure_booThird Party Advisory
- https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-01001.
- https://www.kb.cert.org/vuls/id/309662Third Party AdvisoryUS Government Resource
- https://edk2-docs.gitbook.io/understanding-the-uefi-secure-boot-chain/secure_booThird Party Advisory
- https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-01001.
- https://www.kb.cert.org/vuls/id/309662Third Party AdvisoryUS Government Resource
FAQ
What is CVE-2022-34303?
CVE-2022-34303 is a vulnerability with a CVSS score of 6.7 (MEDIUM). 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...
How severe is CVE-2022-34303?
CVE-2022-34303 has been rated MEDIUM with a CVSS base score of 6.7/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2022-34303?
Check the references section above for vendor advisories and patch information. Affected products include: Eurosoft-Uk Uefi Bootloader, Redhat Enterprise Linux, Microsoft Windows 10, Microsoft Windows 11, Microsoft Windows 8.1.