CVE-2023-28541
📋 TL;DR
This vulnerability allows memory corruption in Qualcomm data modem firmware when processing DMA buffer release events for CFR data. Attackers could potentially execute arbitrary code or cause denial of service on affected devices. This affects smartphones and other devices using vulnerable Qualcomm modem chipsets.
💻 Affected Systems
- Qualcomm modem chipsets with CFR functionality
📦 What is this software?
Video Collaboration Vc1 Platform Firmware by Qualcomm
View all CVEs affecting Video Collaboration Vc1 Platform Firmware →
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution allowing complete device compromise, data exfiltration, or persistent backdoor installation
Likely Case
Device crash/reboot leading to denial of service, potential for limited code execution
If Mitigated
Device instability or crashes without full compromise if memory protections are effective
🎯 Exploit Status
Exploitation requires specialized knowledge of modem firmware and DMA operations
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Refer to July 2023 Qualcomm security bulletin for specific firmware versions
Vendor Advisory: https://www.qualcomm.com/company/product-security/bulletins/july-2023-bulletin
Restart Required: Yes
Instructions:
1. Check device manufacturer for security updates 2. Apply latest firmware/OS update 3. Reboot device after update
🔧 Temporary Workarounds
Disable CFR functionality
allDisable Channel Feedback Report feature in modem configuration if not required
Requires modem firmware configuration changes - consult device manufacturer
🧯 If You Can't Patch
- Isolate affected devices from untrusted networks
- Implement network segmentation to limit modem exposure
🔍 How to Verify
Check if Vulnerable:
Check device firmware version against Qualcomm security bulletin or manufacturer advisoriesCheck Version:
Device-specific commands vary by manufacturer (e.g., Android: Settings > About phone > Baseband version)Verify Fix Applied:
Verify firmware version has been updated to patched version from manufacturer📡 Detection & Monitoring
Log Indicators:
- Modem crash logs
- Unexpected modem resets
- Memory corruption errors in modem logs
Network Indicators:
- Abnormal modem communication patterns
- Unexpected cellular protocol anomalies
SIEM Query:
Not applicable - detection requires modem firmware monitoring capabilities