CVE-2022-25740
📋 TL;DR
This vulnerability allows remote attackers to execute arbitrary code or cause denial of service on affected Qualcomm modem chipsets by exploiting a buffer overflow during IPv6 multicast address construction. It affects devices using vulnerable Qualcomm modem firmware, primarily mobile devices and IoT equipment.
💻 Affected Systems
- Qualcomm modem chipsets
- Devices with Qualcomm modems (smartphones, tablets, IoT devices)
📦 What is this software?
Snapdragon X5 Lte Modem Firmware by Qualcomm
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete device compromise, modem takeover, and potential lateral movement to other system components.
Likely Case
Denial of service causing modem crashes, loss of cellular connectivity, and device instability requiring reboots.
If Mitigated
Limited impact with proper network segmentation and modem isolation, potentially only causing temporary connectivity issues.
🎯 Exploit Status
Exploitation requires crafting specific IPv6 multicast packets but doesn't require authentication. No public exploit code is known.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Refer to Qualcomm's April 2023 security bulletin for specific patched firmware versions
Vendor Advisory: https://www.qualcomm.com/company/product-security/bulletins/april-2023-bulletin
Restart Required: Yes
Instructions:
1. Check device manufacturer for security updates. 2. Apply Qualcomm modem firmware updates from device OEM. 3. Reboot device after update installation.
🔧 Temporary Workarounds
Disable IPv6 on modem interfaces
allPrevents exploitation by disabling the vulnerable IPv6 multicast address construction feature
Device-specific commands vary by platform and manufacturer
Network segmentation
allIsolate modem interfaces from untrusted networks to limit attack surface
🧯 If You Can't Patch
- Segment modem network interfaces from production networks
- Implement strict firewall rules to limit access to modem management interfaces
🔍 How to Verify
Check if Vulnerable:
Check device modem firmware version against Qualcomm's security bulletin. Contact device manufacturer for vulnerability status.Check Version:
Device-specific commands vary. Typically: Android: 'getprop | grep version.baseband' or manufacturer-specific diagnostic toolsVerify Fix Applied:
Verify modem firmware has been updated to a version after Qualcomm's April 2023 security patches📡 Detection & Monitoring
Log Indicators:
- Modem crash logs
- Unexpected modem resets
- IPv6 multicast address construction errors in modem logs
Network Indicators:
- Malformed IPv6 multicast packets targeting modem interfaces
- Unusual traffic patterns to modem management ports
SIEM Query:
Search for modem crash events, unexpected modem resets, or IPv6 protocol anomalies in network traffic logs