CVE-2023-2006
📋 TL;DR
This CVE describes a race condition vulnerability in the Linux kernel's RxRPC network protocol, where improper locking during bundle processing could allow local attackers to escalate privileges and execute arbitrary code with kernel-level permissions. It affects Linux systems using RxRPC, primarily those with specific kernel versions. The vulnerability requires local access to exploit.
💻 Affected Systems
- Linux kernel
📦 What is this software?
Hci Baseboard Management Controller by Netapp
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Hci Baseboard Management Controller by Netapp
View all CVEs affecting Hci Baseboard Management Controller →
Hci Baseboard Management Controller by Netapp
View all CVEs affecting Hci Baseboard Management Controller →
Hci Baseboard Management Controller by Netapp
View all CVEs affecting Hci Baseboard Management Controller →
Hci Baseboard Management Controller by Netapp
View all CVEs affecting Hci Baseboard Management Controller →
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
An attacker with local access could achieve full kernel privilege escalation, gaining root-level control over the system to install malware, exfiltrate data, or disrupt operations.
Likely Case
Local privilege escalation allowing attackers to gain elevated permissions for lateral movement or persistence within compromised environments.
If Mitigated
With proper access controls and network segmentation, impact is limited to the affected system rather than spreading across the network.
🎯 Exploit Status
Exploitation requires local access and race condition timing, making it moderately complex but feasible for skilled attackers.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Kernel versions including commit 3bcd6c7eaa53
Vendor Advisory: https://bugzilla.redhat.com/show_bug.cgi?id=2189112
Restart Required: Yes
Instructions:
1. Check your Linux distribution's security advisories. 2. Update kernel package using your package manager (yum update kernel, apt-get upgrade linux-image, etc.). 3. Reboot the system to load the new kernel.
🔧 Temporary Workarounds
Disable RxRPC module
linuxPrevent loading of the vulnerable RxRPC kernel module
echo 'install rxrpc /bin/false' >> /etc/modprobe.d/rxrpc.conf
rmmod rxrpc
🧯 If You Can't Patch
- Implement strict access controls to limit local user privileges
- Disable RxRPC functionality if not required for system operation
🔍 How to Verify
Check if Vulnerable:
Check kernel version and if RxRPC module is loaded: 'uname -r' and 'lsmod | grep rxrpc'Check Version:
uname -rVerify Fix Applied:
Verify kernel version includes the fix commit and RxRPC module is either updated or disabled📡 Detection & Monitoring
Log Indicators:
- Kernel panic logs
- Unexpected privilege escalation attempts in audit logs
- Failed module loading attempts
Network Indicators:
- Unusual RxRPC protocol traffic patterns
SIEM Query:
source="kernel" AND ("rxrpc" OR "privilege escalation")🔗 References
- https://bugzilla.redhat.com/show_bug.cgi?id=2189112
- https://github.com/torvalds/linux/commit/3bcd6c7eaa53
- https://security.netapp.com/advisory/ntap-20230609-0004/
- https://www.zerodayinitiative.com/advisories/ZDI-23-439/
- https://bugzilla.redhat.com/show_bug.cgi?id=2189112
- https://github.com/torvalds/linux/commit/3bcd6c7eaa53
- https://security.netapp.com/advisory/ntap-20230609-0004/
- https://www.zerodayinitiative.com/advisories/ZDI-23-439/
