Secure Boot bypass in Howyar UEFI Reloader
CVE-2024-7344 is a vulnerability in the Howyar UEFI Application "Reloader" (32-bit and 64-bit), a Microsoft-signed UEFI component distributed with multiple recovery products including Howyar SysReturn, Greenware GreenGuard, Radix SmartRecovery, Sanfong EZ-back System, and CES NeoImpact. The vulnerable application uses a custom PE loader rather than the standard UEFI LoadImage and StartImage mechanisms, and it loads a UEFI binary from a hard-coded path/name, cloak.dat, without properly verifying its signature. Because Reloader itself is signed by Microsoft Corporation UEFI CA 2011 and trusted by Secure Boot, an attacker can abuse it as a bring-your-own-vulnerable-bootloader primitive to execute an unsigned UEFI payload while bypassing Secure Boot policy.
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Impact, mitigation & remediation
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
Impact
What an attacker gets, and what they’ve been doing with it.
Mitigation
If you can’t patch tonight, do this now.
Remediation
Patch, then assume compromise.
Exploits
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Affected products & vendors
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
Recent activity
64 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Уязвимость в подписанном Microsoft UEFI-приложении Reloader, позволяющая обойти Secure Boot через подход BYOVB (bring your own vulnerable bootloader) и выполнить неподписанный код до запуска ОС.
Уязвимость в подписанном Microsoft UEFI-приложении Howyar Reloader, где кастомный PE-загрузчик не проверяет подписи и может загрузить произвольный UEFI-бинарник из cloak.dat, что позволяет обойти Secure Boot и выполнить код в контексте UEFI.
Security Feature Bypass / improper signature verification flaw in a Microsoft-signed UEFI application (Howyar Reloader) that allows loading arbitrary unsigned UEFI code, enabling a BYOVB Secure Boot bypass.
A referenced UEFI Secure Boot-related vulnerability mentioned in the context of EFI bootloader tampering and bootkit detection.
The version that knows your environment.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.