CVE-2024-31837
📋 TL;DR
DMitry 1.3a contains a format-string vulnerability that allows attackers to read memory contents or potentially execute arbitrary code by providing specially crafted input. This affects users who run DMitry with untrusted input or in automated scanning scenarios. The vulnerability is similar to CVE-2017-7938, which was a previous format-string issue in the same tool.
💻 Affected Systems
- DMitry (Deepmagic Information Gathering Tool)
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to full system compromise if DMitry is used in server mode or with network-accessible input.
Likely Case
Information disclosure through memory leaks, potentially exposing sensitive data like passwords or encryption keys from the process memory.
If Mitigated
Limited impact if DMitry is only used interactively with trusted input and proper input validation is implemented.
🎯 Exploit Status
Format-string vulnerabilities typically require specific knowledge of memory layout and exploitation techniques. The similar CVE-2017-7938 had public exploits, suggesting this could be weaponized.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Patched in the GitHub repository via pull request #12
Vendor Advisory: https://lists.debian.org/debian-lts-announce/2024/10/msg00024.html
Restart Required: No
Instructions:
1. Update DMitry from the official GitHub repository. 2. Apply the patch from pull request #12 if using source code. 3. For Debian systems, apply security updates via apt-get update && apt-get upgrade.
🔧 Temporary Workarounds
Input Sanitization
linuxValidate and sanitize all input passed to DMitry commands
# Example: Use parameter expansion to sanitize input
input="${1//[^a-zA-Z0-9.-]/}"
dmitry -s "$input"
Remove DMitry
linuxUninstall DMitry if not required for operations
sudo apt-get remove dmitry
sudo yum remove dmitry
sudo make uninstall (if compiled from source)
🧯 If You Can't Patch
- Restrict DMitry usage to trusted users only and implement strict input validation
- Monitor DMitry execution and log all commands with their parameters for anomaly detection
🔍 How to Verify
Check if Vulnerable:
Check DMitry version: dmitry --version | grep -i version. If it shows 1.3a, you are vulnerable.Check Version:
dmitry --version 2>&1 | head -1Verify Fix Applied:
Verify the patch is applied by checking if format string functions (printf, fprintf, sprintf) in the source code use proper format specifiers with user input.📡 Detection & Monitoring
Log Indicators:
- Unusual DMitry command executions with special characters like %n, %x, %s in parameters
- Multiple failed DMitry executions with malformed input
Network Indicators:
- DMitry network scans originating from unexpected sources
- Unusual outbound connections following DMitry execution
SIEM Query:
process.name:"dmitry" AND command_line:"%*"