CVE-2023-46723
📋 TL;DR
This vulnerability in lte-pic32-writer exposes sensitive API keys and webhook URLs stored in the sendto.txt file to attackers who know the device's IMEI. Anyone using lte-pic32-writer versions 0.0.1 and earlier with sendto.txt functionality is affected. The exposed credentials could allow attackers to post messages to integrated services like Slack or Zulip.
💻 Affected Systems
- lte-pic32-writer
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers gain access to integrated messaging platforms, post malicious content, exfiltrate data, or disrupt communications using stolen API keys.
Likely Case
Unauthorized access to messaging platforms leading to spam, phishing messages, or data leakage through exposed webhook URLs.
If Mitigated
Minimal impact if sendto.txt is not used or properly secured with access controls.
🎯 Exploit Status
Exploitation requires knowledge of the device's IMEI; no public exploit code has been identified at time of analysis.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not available
Vendor Advisory: https://github.com/paijp/lte-pic32-writer/security/advisories/GHSA-9qgg-ph2v-v4mh
Restart Required: No
Instructions:
No official patch available; follow workarounds until a fix is released.
🔧 Temporary Workarounds
Disable sendto.txt usage
allCompletely avoid using the sendto.txt file to prevent credential exposure.
Remove or rename sendto.txt file if present
Restrict access with .htaccess
linuxUse .htaccess to block web access to the sendto.txt file on web servers.
Add 'Deny from all' to .htaccess file in directory containing sendto.txt
🧯 If You Can't Patch
- Monitor for unauthorized access to integrated messaging platforms (Slack, Zulip)
- Rotate all API keys and webhook URLs that may have been exposed in sendto.txt
🔍 How to Verify
Check if Vulnerable:
Check if lte-pic32-writer version is 0.0.1 or earlier and if sendto.txt file exists with sensitive content.Check Version:
Check package version or repository commit history for lte-pic32-writerVerify Fix Applied:
Verify sendto.txt is not present or properly secured with access controls.📡 Detection & Monitoring
Log Indicators:
- Unauthorized access attempts to sendto.txt file
- Unexpected messages posted to integrated platforms
Network Indicators:
- Unusual outbound traffic to Slack/Zulip APIs from affected devices
SIEM Query:
Search for file access events to sendto.txt or failed authentication to messaging platform APIs