CVE-2023-34351
📋 TL;DR
A buffer underflow vulnerability in Intel PCM software versions before 202307 allows unauthenticated attackers to potentially cause denial of service via network access. This affects systems running vulnerable versions of Intel PCM software, primarily impacting administrators and organizations using Intel's performance monitoring tools.
💻 Affected Systems
- Intel(R) Performance Counter Monitor (PCM)
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system crash or service disruption of Intel PCM software, potentially affecting performance monitoring capabilities across monitored systems.
Likely Case
Denial of service affecting Intel PCM software functionality, requiring service restart or system reboot to restore normal operation.
If Mitigated
Minimal impact with proper network segmentation and access controls limiting exposure to trusted networks only.
🎯 Exploit Status
The vulnerability description indicates unauthenticated network access is sufficient for exploitation, suggesting relatively straightforward attack vectors.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 202307 or later
Vendor Advisory: https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00954.html
Restart Required: Yes
Instructions:
1. Download Intel PCM version 202307 or later from Intel's official website. 2. Stop any running PCM services. 3. Install the updated version following Intel's installation guide. 4. Restart the system or PCM services.
🔧 Temporary Workarounds
Network Segmentation
linuxRestrict network access to Intel PCM software to trusted management networks only
iptables -A INPUT -p tcp --dport [PCM_PORT] -s [TRUSTED_NETWORK] -j ACCEPT
iptables -A INPUT -p tcp --dport [PCM_PORT] -j DROP
Service Disablement
linuxTemporarily disable Intel PCM services if not actively needed
systemctl stop pcm
systemctl disable pcm
🧯 If You Can't Patch
- Implement strict network access controls to limit exposure to trusted management networks only
- Monitor for unusual network traffic patterns or service disruptions related to Intel PCM
🔍 How to Verify
Check if Vulnerable:
Check Intel PCM version using 'pcm --version' or examine installed package versionCheck Version:
pcm --versionVerify Fix Applied:
Verify installed version is 202307 or later and test PCM functionality📡 Detection & Monitoring
Log Indicators:
- Unexpected PCM service crashes
- Connection attempts from unauthorized sources to PCM ports
- System logs showing buffer-related errors
Network Indicators:
- Unusual traffic patterns to PCM service ports
- Connection attempts from unexpected IP ranges
SIEM Query:
source="system" AND ("pcm" OR "Performance Counter Monitor") AND ("crash" OR "error" OR "buffer")