CVE-2025-1176
📋 TL;DR
A critical heap-based buffer overflow vulnerability in GNU Binutils' linker component (ld) allows remote attackers to potentially execute arbitrary code or cause denial of service. This affects systems using Binutils 2.43 for processing untrusted ELF files. The vulnerability is in the garbage collection marking function for relocation sections.
💻 Affected Systems
- GNU Binutils
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise, data theft, or persistent backdoor installation.
Likely Case
Denial of service through application crashes when processing malicious ELF files during linking operations.
If Mitigated
Limited impact if systems don't process untrusted ELF files or have memory protection mechanisms enabled.
🎯 Exploit Status
Exploit requires crafting malicious ELF files and getting them processed by vulnerable ld. Attack complexity is high but public disclosure increases weaponization risk.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Patched in commit f9978defb6fab0bd8583942d97c112b0932ac814
Vendor Advisory: https://sourceware.org/bugzilla/show_bug.cgi?id=32636
Restart Required: No
Instructions:
1. Update Binutils to version with commit f9978defb6fab0bd8583942d97c112b0932ac814
2. Recompile any affected binaries
3. For distributions: apply security patches from your vendor
🔧 Temporary Workarounds
Restrict ELF file processing
allLimit processing of untrusted ELF files on vulnerable systems
Enable memory protection
linuxUse ASLR, DEP, and other memory protection mechanisms
echo 2 > /proc/sys/kernel/randomize_va_space
sysctl -w kernel.exec-shield=1
🧯 If You Can't Patch
- Isolate build systems and restrict processing of untrusted ELF files
- Implement strict input validation and sandboxing for ELF processing operations
🔍 How to Verify
Check if Vulnerable:
Check Binutils version: ld --version | grep 'GNU ld'Check Version:
ld --versionVerify Fix Applied:
Verify patch is applied: git log --oneline | grep f9978defb6fab0bd8583942d97c112b0932ac814📡 Detection & Monitoring
Log Indicators:
- Segmentation faults in ld processes
- Abnormal memory usage in linking operations
- Unexpected process termination during ELF processing
Network Indicators:
- Unusual file transfers to build systems
- Suspicious ELF file uploads to web services
SIEM Query:
process_name:"ld" AND (event_type:"segmentation_fault" OR exit_code:139)🔗 References
- https://sourceware.org/bugzilla/attachment.cgi?id=15913
- https://sourceware.org/bugzilla/show_bug.cgi?id=32636
- https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=f9978defb6fab0bd8583942d97c112b0932ac814
- https://vuldb.com/?ctiid.295079
- https://vuldb.com/?id.295079
- https://vuldb.com/?submit.495329
- https://www.gnu.org/
- https://security.netapp.com/advisory/ntap-20250411-0007/
