CVE-2025-0840
📋 TL;DR
A stack-based buffer overflow vulnerability exists in GNU Binutils' objdump tool when processing specially crafted input. This could allow remote attackers to potentially execute arbitrary code or cause denial of service. Users of Binutils versions up to 2.43 are affected.
💻 Affected Systems
- GNU Binutils
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise if exploitation succeeds and no mitigations are in place.
Likely Case
Application crash (denial of service) due to the high complexity and difficulty of reliable exploitation.
If Mitigated
Minimal impact if modern OS protections (ASLR, stack canaries) are enabled and the system is properly hardened.
🎯 Exploit Status
Exploit details are publicly available but reliable exploitation is considered difficult due to modern mitigations.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.44
Vendor Advisory: https://sourceware.org/bugzilla/show_bug.cgi?id=32560
Restart Required: No
Instructions:
1. Download Binutils 2.44 from official GNU mirrors. 2. Compile and install following standard build procedures. 3. Replace existing Binutils installation with new version.
🔧 Temporary Workarounds
Restrict objdump usage
linuxLimit execution of objdump to trusted users and avoid processing untrusted files.
chmod 750 /usr/bin/objdump
setfacl -m u:trusteduser:rx /usr/bin/objdump
Enable OS security features
linuxEnsure ASLR, stack protection, and other memory corruption mitigations are active.
sysctl -w kernel.randomize_va_space=2
gcc -fstack-protector-strong -D_FORTIFY_SOURCE=2
🧯 If You Can't Patch
- Implement strict input validation for any application using Binutils tools
- Isolate systems running vulnerable Binutils versions from untrusted networks
🔍 How to Verify
Check if Vulnerable:
Run 'objdump --version' and check if version is 2.43 or earlier.Check Version:
objdump --version | head -1Verify Fix Applied:
After upgrade, confirm version is 2.44 or later with 'objdump --version'.📡 Detection & Monitoring
Log Indicators:
- Segmentation fault crashes of objdump process
- Abnormal memory access patterns in system logs
Network Indicators:
- Unexpected network connections originating from objdump processes
SIEM Query:
process_name:"objdump" AND (event_type:"crash" OR exit_code:139)🔗 References
- https://sourceware.org/bugzilla/attachment.cgi?id=15882
- https://sourceware.org/bugzilla/show_bug.cgi?id=32560
- https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=baac6c221e9d69335bf41366a1c7d87d8ab2f893
- https://vuldb.com/?ctiid.293997
- https://vuldb.com/?id.293997
- https://vuldb.com/?submit.485255
- https://www.gnu.org/
