CVE-2020-7823
📋 TL;DR
DaviewIndy has a memory corruption vulnerability in its image processing component. When a user opens a specially crafted malicious image file with Daview.exe, attackers can execute arbitrary code on the system. This affects all users of vulnerable DaviewIndy software versions.
💻 Affected Systems
- DaviewIndy
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with attacker gaining complete control over the affected system, allowing data theft, lateral movement, and persistent access.
Likely Case
Local privilege escalation or remote code execution leading to malware installation, data exfiltration, or system disruption.
If Mitigated
Limited impact with proper application sandboxing, memory protection mechanisms, and user privilege restrictions in place.
🎯 Exploit Status
Exploitation requires user interaction (opening malicious file). No public exploit code was found in references.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check vendor advisory for specific patched version
Vendor Advisory: https://www.krcert.or.kr/krcert/secNoticeView.do?bulletin_writing_sequence=35545
Restart Required: Yes
Instructions:
1. Visit the vendor advisory URL
2. Download the latest patched version of DaviewIndy
3. Uninstall the vulnerable version
4. Install the patched version
5. Restart the system
🔧 Temporary Workarounds
Disable file type associations
windowsRemove Daview.exe as default handler for image file types to prevent automatic exploitation
Control Panel > Default Programs > Set Associations > Remove DaviewIndy from image file types
Application control policy
windowsBlock execution of Daview.exe via application whitelisting or endpoint protection
🧯 If You Can't Patch
- Implement strict user privilege restrictions to limit damage from exploitation
- Deploy memory protection mechanisms like DEP and ASLR
🔍 How to Verify
Check if Vulnerable:
Check DaviewIndy version against vendor advisory. If using any version before the patched release, system is vulnerable.Check Version:
Check program properties or About dialog in DaviewIndy applicationVerify Fix Applied:
Verify DaviewIndy version matches or exceeds the patched version specified in vendor advisory.📡 Detection & Monitoring
Log Indicators:
- Daview.exe crashes with memory access violations
- Unexpected child processes spawned from Daview.exe
- Abnormal file access patterns from Daview.exe
Network Indicators:
- Outbound connections from Daview.exe to unexpected destinations
- DNS queries for suspicious domains from system running DaviewIndy
SIEM Query:
Process Creation where ParentImage contains 'daview.exe' AND CommandLine contains suspicious parameters