CVE-2022-21711
📋 TL;DR
CVE-2022-21711 is an out-of-bounds read vulnerability in elfspirit versions prior to 1.1 that allows attackers to cause application crashes or leak memory information by providing specially crafted ELF files. This affects users of the elfspirit ELF analysis framework for parsing, manipulating, or camouflaging ELF files. The vulnerability can lead to information disclosure about memory addresses.
💻 Affected Systems
- elfspirit
📦 What is this software?
Elfspirit by Elfspirit Project
⚠️ Risk & Real-World Impact
Worst Case
Information leakage of sensitive memory addresses leading to potential ASLR bypass or further exploitation, combined with denial of service through application crashes.
Likely Case
Application crashes when processing malicious ELF files, potentially disrupting ELF analysis workflows and causing denial of service.
If Mitigated
Minimal impact if proper input validation and sandboxing are implemented, with crashes contained to isolated environments.
🎯 Exploit Status
Exploitation requires crafting a malicious ELF file and having the target process it through elfspirit. No public exploit code has been identified.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.1
Vendor Advisory: https://github.com/liyansong2018/elfspirit/security/advisories/GHSA-jr8h-2657-m68r
Restart Required: No
Instructions:
1. Update elfspirit to version 1.1 or later using: pip install --upgrade elfspirit
2. Verify the update with: pip show elfspirit
3. Ensure version 1.1 or higher is installed
🔧 Temporary Workarounds
Input validation and sandboxing
linuxImplement strict input validation for ELF files and run elfspirit in isolated environments
Disable or restrict usage
allTemporarily disable elfspirit usage for processing untrusted ELF files
🧯 If You Can't Patch
- Implement strict access controls to limit who can use elfspirit
- Process ELF files only in isolated, non-production environments with limited privileges
🔍 How to Verify
Check if Vulnerable:
Check elfspirit version with: pip show elfspirit | grep Version
If version is less than 1.1, the system is vulnerable.Check Version:
pip show elfspirit | grep VersionVerify Fix Applied:
Verify version is 1.1 or higher with: pip show elfspirit | grep Version
Test with known safe ELF files to ensure functionality.📡 Detection & Monitoring
Log Indicators:
- Application crashes when processing ELF files
- Segmentation faults in elfspirit processes
- Unexpected memory access errors
Network Indicators:
- N/A - This is a local file processing vulnerability
SIEM Query:
Process execution of elfspirit with subsequent crash events or memory violation alerts🔗 References
- https://github.com/liyansong2018/elfspirit/commit/c5b0f5a9a24f2451bbeda4751d67633bc375e608
- https://github.com/liyansong2018/elfspirit/issues/1
- https://github.com/liyansong2018/elfspirit/security/advisories/GHSA-jr8h-2657-m68r
- https://github.com/liyansong2018/elfspirit/commit/c5b0f5a9a24f2451bbeda4751d67633bc375e608
- https://github.com/liyansong2018/elfspirit/issues/1
- https://github.com/liyansong2018/elfspirit/security/advisories/GHSA-jr8h-2657-m68r
