CVE-2023-53420
📋 TL;DR
A memory corruption vulnerability in the Linux kernel's NTFS3 filesystem driver allows attackers to trigger a kernel panic or potentially execute arbitrary code. This affects systems using the NTFS3 driver to mount NTFS filesystems, primarily Linux servers and workstations with NTFS partitions.
💻 Affected Systems
- Linux kernel with NTFS3 driver
📦 What is this software?
Linux Kernel by Linux
The Linux Kernel is the core component of the Linux operating system, serving as the critical interface between computer hardware and software processes. As the heart of millions of servers, cloud infrastructure, embedded systems, Android devices, and IoT deployments worldwide, the Linux Kernel mana...
Learn more about Linux Kernel →Linux Kernel by Linux
The Linux Kernel is the core component of the Linux operating system, serving as the critical interface between computer hardware and software processes. As the heart of millions of servers, cloud infrastructure, embedded systems, Android devices, and IoT deployments worldwide, the Linux Kernel mana...
Learn more about Linux Kernel →Linux Kernel by Linux
The Linux Kernel is the core component of the Linux operating system, serving as the critical interface between computer hardware and software processes. As the heart of millions of servers, cloud infrastructure, embedded systems, Android devices, and IoT deployments worldwide, the Linux Kernel mana...
Learn more about Linux Kernel →⚠️ Risk & Real-World Impact
Worst Case
Kernel panic leading to system crash, denial of service, or potential privilege escalation to kernel-level code execution.
Likely Case
System crash or kernel panic causing denial of service when accessing specially crafted NTFS extended attributes.
If Mitigated
Limited to denial of service if exploit attempts are blocked or system has proper isolation.
🎯 Exploit Status
Requires ability to create or modify NTFS extended attributes on mounted filesystems. Found via syzbot fuzzing.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Linux kernel with commits 3c675ddffb17a8b1e32efad5c983254af18b12c2 or later
Vendor Advisory: https://git.kernel.org/stable/c/3c675ddffb17a8b1e32efad5c983254af18b12c2
Restart Required: Yes
Instructions:
1. Update Linux kernel to patched version from your distribution. 2. Reboot system to load new kernel. 3. Verify kernel version with 'uname -r'.
🔧 Temporary Workarounds
Disable NTFS3 driver
linuxPrevent loading of vulnerable NTFS3 kernel module
echo 'blacklist ntfs3' >> /etc/modprobe.d/blacklist-ntfs3.conf
rmmod ntfs3
Use ntfs-3g userspace driver
linuxMount NTFS filesystems using FUSE-based ntfs-3g instead of kernel driver
apt-get install ntfs-3g
mount -t ntfs-3g /dev/sdX /mnt/ntfs
🧯 If You Can't Patch
- Restrict filesystem access to trusted users only
- Avoid mounting untrusted NTFS filesystems
🔍 How to Verify
Check if Vulnerable:
Check if NTFS3 module is loaded: 'lsmod | grep ntfs3'. Check kernel version against distribution security advisories.Check Version:
uname -rVerify Fix Applied:
Verify kernel version includes fix commits: 'uname -r'. Check that NTFS3 module version matches patched kernel.📡 Detection & Monitoring
Log Indicators:
- Kernel panic messages
- KASAN slab-out-of-bounds errors in kernel logs
- System crashes when accessing NTFS filesystems
Network Indicators:
- None - local filesystem vulnerability
SIEM Query:
source="kernel" AND ("KASAN" OR "slab-out-of-bounds" OR "ntfs_listxattr")