CVE-2020-20335
📋 TL;DR
A buffer overflow vulnerability in the Kilo text editor allows remote attackers to cause denial of service by exploiting the editorUpdateRow function. This affects users running vulnerable versions of Kilo, particularly those opening malicious files or receiving untrusted input through the editor.
💻 Affected Systems
- Antirez Kilo
📦 What is this software?
Kilo by Kilo Project
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise if the buffer overflow can be controlled to execute arbitrary code.
Likely Case
Denial of service causing the Kilo editor to crash when processing specially crafted input.
If Mitigated
Limited impact if the editor is used only with trusted files and input validation is enforced.
🎯 Exploit Status
Exploitation requires crafting specific input to trigger the buffer overflow, but no public proof-of-concept has been disclosed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Commit 7709a04ae8520c5b04d261616098cebf742f5a23 and later
Vendor Advisory: https://github.com/antirez/kilo/issues/60
Restart Required: No
Instructions:
1. Clone the latest Kilo repository from GitHub. 2. Ensure the commit hash includes 7709a04ae8520c5b04d261616098cebf742f5a23. 3. Recompile and replace the existing Kilo binary.
🔧 Temporary Workarounds
Avoid Untrusted Input
allRestrict Kilo usage to trusted files and avoid opening files from unknown sources.
🧯 If You Can't Patch
- Discontinue use of Kilo and switch to a patched or alternative text editor.
- Implement strict file access controls to prevent opening untrusted files with Kilo.
🔍 How to Verify
Check if Vulnerable:
Check the Kilo version or commit hash; if earlier than commit 7709a04ae8520c5b04d261616098cebf742f5a23, it is vulnerable.Check Version:
kilo --version or check git log in the Kilo source directory.Verify Fix Applied:
Verify the Kilo binary includes commit 7709a04ae8520c5b04d261616098cebf742f5a23 by checking version or commit history.📡 Detection & Monitoring
Log Indicators:
- Segmentation fault or crash logs from Kilo process
SIEM Query:
Process:name='kilo' AND Event:type='crash'