CVE-2024-45619
📋 TL;DR
A buffer handling vulnerability in OpenSC and related components allows attackers to access uninitialized memory via crafted USB devices or smart cards. This could lead to information disclosure or system instability. Systems using OpenSC for smart card authentication or cryptographic operations are affected.
💻 Affected Systems
- OpenSC
- OpenSC tools
- PKCS#11 module
- minidriver
- CTK
📦 What is this software?
Opensc by Opensc Project
⚠️ Risk & Real-World Impact
Worst Case
Information disclosure of sensitive memory contents, potentially including cryptographic keys or authentication credentials, leading to system compromise.
Likely Case
Application crashes or denial of service due to memory corruption, with possible limited information leakage.
If Mitigated
Minimal impact if systems don't use affected OpenSC components or have physical access controls preventing malicious device insertion.
🎯 Exploit Status
Requires physical access to insert malicious USB device or smart card, or ability to present crafted APDU responses through other means.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Distribution-specific (e.g., Red Hat, Debian have released updates)
Vendor Advisory: https://access.redhat.com/security/cve/CVE-2024-45619
Restart Required: Yes
Instructions:
1. Check your distribution's security advisories. 2. Update OpenSC packages using your package manager (yum update opensc, apt-get upgrade opensc). 3. Restart affected services or reboot system.
🔧 Temporary Workarounds
Disable vulnerable components
linuxDisable OpenSC smart card services if not required
systemctl disable pcscd
systemctl stop pcscd
Physical access controls
allImplement USB port restrictions and smart card reader access controls
🧯 If You Can't Patch
- Implement strict physical security controls to prevent unauthorized USB device insertion
- Disable smart card authentication and remove OpenSC components if not essential
🔍 How to Verify
Check if Vulnerable:
Check OpenSC version: opensc-tool -v and compare with patched versions from vendor advisoriesCheck Version:
opensc-tool -v 2>/dev/null || rpm -q opensc || dpkg -l openscVerify Fix Applied:
Verify updated package version and test smart card functionality📡 Detection & Monitoring
Log Indicators:
- pcscd service crashes
- OpenSC error messages in system logs
- unusual USB device insertion logs
Network Indicators:
- None - local physical attack only
SIEM Query:
source="systemd" AND "pcscd" AND ("segmentation fault" OR "crash")