CVE-2023-26980
📋 TL;DR
CVE-2023-26980 is a race condition vulnerability in PAX Technology A920 Pro payment terminals running PayDroid 8.1. It could allow attackers to bypass the secure payment software and force the device to boot directly into standard Android during startup. This affects payment terminal operators and merchants using these specific devices.
💻 Affected Systems
- PAX Technology A920 Pro
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers gain full Android OS access on payment terminals, potentially compromising payment data, installing malware, or disabling payment functionality entirely.
Likely Case
Temporary disruption of payment processing during boot attacks, requiring device restart to restore normal operation.
If Mitigated
Minimal impact with proper physical security controls and monitoring, as exploitation requires physical access during boot.
🎯 Exploit Status
Race condition requires precise timing during boot. Physical device access needed. No public exploit code available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None provided
Restart Required: No
Instructions:
No official patch available. Contact PAX Technology for security updates and guidance.
🔧 Temporary Workarounds
Physical Security Controls
allRestrict physical access to payment terminals during boot/restart cycles
Boot Monitoring
allMonitor devices during startup and investigate any abnormal boot behavior
🧯 If You Can't Patch
- Implement strict physical security controls around payment terminals
- Monitor devices for unexpected reboots or boot anomalies
🔍 How to Verify
Check if Vulnerable:
Check device model and PayDroid version in device settings. If PAX A920 Pro with PayDroid 8.1, assume vulnerable.Check Version:
Check device settings > About device > Software informationVerify Fix Applied:
Contact PAX Technology for security updates and verify PayDroid version is updated beyond 8.1.📡 Detection & Monitoring
Log Indicators:
- Unexpected device reboots
- Boot process anomalies
- Payment software failing to load
Network Indicators:
- Payment terminal offline during expected hours
- Unusual network traffic from terminal
SIEM Query:
Device logs showing multiple boot attempts or payment software startup failures🔗 References
- https://docs.google.com/document/d/189b1494s8RF8ksaOijKhKb-3B8gj3pLUmgn0dqg-jqs/edit
- https://drive.google.com/drive/u/0/folders/14X-XTYhkiaIVBS3zf68VigG4-imbKEuV
- https://uploads.strikinglycdn.com/files/f1d54bf4-3803-480c-b4d3-0943f7dac76e/A920_EN_20200605.pdf?id=237392
- https://docs.google.com/document/d/189b1494s8RF8ksaOijKhKb-3B8gj3pLUmgn0dqg-jqs/edit
- https://drive.google.com/drive/u/0/folders/14X-XTYhkiaIVBS3zf68VigG4-imbKEuV
- https://uploads.strikinglycdn.com/files/f1d54bf4-3803-480c-b4d3-0943f7dac76e/A920_EN_20200605.pdf?id=237392
