CVE-2022-25634
📋 TL;DR
This vulnerability in Qt allows attackers to load malicious system library files from unintended directories, potentially leading to arbitrary code execution. It affects applications using Qt 5 through 5.15.8 and Qt 6.x through 6.2.3 on all platforms where Qt is deployed.
💻 Affected Systems
- Qt framework
- Applications using Qt libraries
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution with the privileges of the Qt application, potentially leading to full system compromise.
Likely Case
Local privilege escalation or arbitrary code execution when combined with other attack vectors.
If Mitigated
Limited impact if proper file permissions and application sandboxing are implemented.
🎯 Exploit Status
Exploitation requires ability to place malicious library files in specific directories accessible to the Qt application.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Qt 5.15.9+, Qt 6.2.4+
Vendor Advisory: https://codereview.qt-project.org/c/qt/qtbase/+/396440
Restart Required: Yes
Instructions:
1. Update Qt to version 5.15.9 or higher for Qt 5, or 6.2.4 or higher for Qt 6. 2. Recompile and redeploy all applications using Qt. 3. Apply patches from official Qt repositories if updating is not possible.
🔧 Temporary Workarounds
Restrict library search paths
allUse OS-level controls to restrict where Qt applications can load libraries from
On Linux: Use SELinux/AppArmor policies
On Windows: Configure application control policies
Run with minimal privileges
allRun Qt applications with least privilege to limit impact of exploitation
sudo -u lowprivuser ./qt_application
runas /user:lowprivuser qt_application.exe
🧯 If You Can't Patch
- Implement strict file system permissions to prevent unauthorized library placement
- Use application sandboxing or containerization to isolate Qt applications
🔍 How to Verify
Check if Vulnerable:
Check Qt version using qmake --version or examine Qt library files for version informationCheck Version:
qmake --versionVerify Fix Applied:
Verify Qt version is 5.15.9+ or 6.2.4+ and check that patches from official repositories are applied📡 Detection & Monitoring
Log Indicators:
- Unexpected library loading from non-standard paths
- Process execution anomalies in Qt applications
Network Indicators:
- None - this is a local file system vulnerability
SIEM Query:
Process creation where parent process is Qt application AND loaded libraries include suspicious paths🔗 References
- https://codereview.qt-project.org/c/qt/qtbase/+/396440
- https://codereview.qt-project.org/c/qt/qtbase/+/396689
- https://codereview.qt-project.org/c/qt/tqtc-qtbase/+/396690
- https://download.qt.io/official_releases/qt/5.15/CVE-2022-25643-5.15.diff
- https://download.qt.io/official_releases/qt/6.2/CVE-2022-25643-6.2.diff
- https://codereview.qt-project.org/c/qt/qtbase/+/396440
- https://codereview.qt-project.org/c/qt/qtbase/+/396689
- https://codereview.qt-project.org/c/qt/tqtc-qtbase/+/396690
- https://download.qt.io/official_releases/qt/5.15/CVE-2022-25643-5.15.diff
- https://download.qt.io/official_releases/qt/6.2/CVE-2022-25643-6.2.diff
