CVE-2024-45782
📋 TL;DR
This vulnerability in the HFS filesystem driver allows attackers to trigger a heap-based buffer overflow by providing a specially crafted volume name. This could lead to arbitrary code execution in GRUB bootloader context, potentially bypassing secure boot protections. Systems using GRUB with HFS filesystem support are affected.
💻 Affected Systems
- GRUB2
- Red Hat Enterprise Linux
- Fedora
- CentOS Stream
- Other Linux distributions using GRUB
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete secure boot bypass allowing persistent malware installation, system compromise, and data integrity loss.
Likely Case
Local privilege escalation or boot process manipulation requiring physical or administrative access to the system.
If Mitigated
Limited impact if secure boot is properly configured and physical access controls are enforced.
🎯 Exploit Status
Requires ability to mount HFS volumes or modify boot configuration. No public exploits available as of knowledge cutoff.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: GRUB2 updates in July 2024 (specific versions vary by distribution)
Vendor Advisory: https://access.redhat.com/security/cve/CVE-2024-45782
Restart Required: Yes
Instructions:
1. Update GRUB2 package via package manager. 2. Regenerate GRUB configuration. 3. Reboot system to load patched GRUB.
🔧 Temporary Workarounds
Disable HFS support in GRUB
linuxRemove HFS filesystem module from GRUB to prevent exploitation
Edit /etc/default/grub and add GRUB_DISABLE_OS_PROBER=true
Run update-grub or grub2-mkconfig
🧯 If You Can't Patch
- Restrict physical access to systems and secure boot media
- Implement strict access controls for boot configuration and GRUB editing
🔍 How to Verify
Check if Vulnerable:
Check GRUB version: grub2-install --version or rpm -q grub2Check Version:
grub2-install --version || rpm -q grub2 || dpkg -l | grep grubVerify Fix Applied:
Verify GRUB package version matches patched release from vendor advisory📡 Detection & Monitoring
Log Indicators:
- GRUB error messages related to HFS mounting
- Unexpected GRUB configuration changes
Network Indicators:
- Not network exploitable - local attack only
SIEM Query:
Search for GRUB configuration file modifications or boot process anomalies