CVE-2024-34704
📋 TL;DR
This vulnerability in the era-compiler-solidity ZKsync compiler for Solidity could cause incorrect compilation of smart contracts when XOR operations are optimized. Developers using this compiler to build smart contracts for ZKsync are affected, potentially leading to contract logic errors.
💻 Affected Systems
- era-compiler-solidity
⚠️ 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
Smart contracts compiled with the vulnerable compiler could execute incorrect logic, potentially leading to financial losses, contract failures, or security breaches in decentralized applications.
Likely Case
Compiled smart contracts may behave unexpectedly or produce incorrect results due to improper optimization of XOR operations during compilation.
If Mitigated
With proper testing and verification of compiled contracts, the impact is limited to potential compilation errors that can be caught before deployment.
🎯 Exploit Status
Exploitation requires understanding of compiler internals and ability to craft specific Solidity code patterns that trigger the vulnerable optimization.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.4.1
Vendor Advisory: https://github.com/matter-labs/era-compiler-solidity/security/advisories/GHSA-22pj-7cvw-r3gc
Restart Required: No
Instructions:
1. Update era-compiler-solidity to version 1.4.1 or later. 2. Recompile any smart contracts that were compiled with vulnerable versions. 3. Verify the compiled contracts function correctly.
🔧 Temporary Workarounds
Disable DAGCombine optimization
allTemporarily disable the DAGCombine optimization phase during compilation to avoid the vulnerable code path
Check compiler documentation for optimization flags to disable DAGCombine
🧯 If You Can't Patch
- Thoroughly test all smart contracts compiled with vulnerable versions before deployment
- Implement additional contract verification and auditing steps for contracts compiled during the vulnerable period
🔍 How to Verify
Check if Vulnerable:
Check the era-compiler-solidity version. If it's below 1.4.1, you are vulnerable.Check Version:
era-compiler-solidity --versionVerify Fix Applied:
Verify era-compiler-solidity version is 1.4.1 or higher and test compilation of contracts containing XOR operations.📡 Detection & Monitoring
Log Indicators:
- Compiler error messages related to XOR operations or optimization failures
- Unexpected contract behavior after compilation
Network Indicators:
- N/A - This is a compilation issue, not a network vulnerability
SIEM Query:
N/A - This vulnerability doesn't generate network traffic or system events