CVE-2022-23066
📋 TL;DR
This vulnerability in Solana's rBPF virtual machine involves an incorrect implementation of the signed division (sdiv) instruction, causing miscalculations that can lead to wrong execution paths. This could result in improper token transfers or other unintended blockchain operations, affecting the integrity and availability of Solana-based applications. Anyone using affected rBPF versions in Solana validators or smart contracts is impacted.
💻 Affected Systems
- Solana rBPF virtual machine
📦 What is this software?
Rbpf by Solana
Rbpf by Solana
⚠️ Risk & Real-World Impact
Worst Case
Malicious actors could exploit the incorrect sdiv calculation to bypass token transfer validation, potentially draining funds from vulnerable smart contracts or causing consensus failures across the Solana network.
Likely Case
Smart contracts relying on sdiv calculations for conditional logic could execute unintended operations, leading to incorrect token transfers or contract state corruption.
If Mitigated
With proper monitoring and rapid patching, impact is limited to temporary transaction validation issues that can be rolled back or corrected.
🎯 Exploit Status
Exploitation requires crafting specific smart contracts that trigger the incorrect sdiv calculation, but no public proof-of-concept has been released.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: rBPF 0.2.28 and later
Vendor Advisory: https://github.com/solana-labs/rbpf/commit/e61e045f8c244de978401d186dcfd50838817297
Restart Required: Yes
Instructions:
1. Update Solana to version 1.10.29 or later. 2. Ensure rBPF dependency is updated to 0.2.28+. 3. Restart validator nodes. 4. Redeploy affected smart contracts.
🔧 Temporary Workarounds
Disable vulnerable smart contracts
allTemporarily pause or disable smart contracts that use sdiv operations until patched.
🧯 If You Can't Patch
- Implement strict monitoring for unusual token transfers or contract executions
- Consider temporarily reducing validator participation to limit potential impact
🔍 How to Verify
Check if Vulnerable:
Check rBPF version in Solana validator logs or configuration: grep -i 'rbpf' solana-validator.logCheck Version:
solana --versionVerify Fix Applied:
Verify Solana version is 1.10.29+ and rBPF is 0.2.28+: solana --version && check Cargo.toml for rBPF dependency📡 Detection & Monitoring
Log Indicators:
- Unexpected sdiv calculation errors
- Smart contract execution failures
- Validator consensus anomalies
Network Indicators:
- Unusual token transfer patterns
- Increased transaction failures
SIEM Query:
source="solana-validator.log" AND ("sdiv" OR "division" OR "calculation error")🔗 References
- https://blocksecteam.medium.com/how-a-critical-bug-in-solana-network-was-detected-and-timely-patched-a701870e1324
- https://github.com/solana-labs/rbpf/commit/e61e045f8c244de978401d186dcfd50838817297
- https://www.whitesourcesoftware.com/vulnerability-database/CVE-2022-23066
- https://blocksecteam.medium.com/how-a-critical-bug-in-solana-network-was-detected-and-timely-patched-a701870e1324
- https://github.com/solana-labs/rbpf/commit/e61e045f8c244de978401d186dcfd50838817297
- https://www.whitesourcesoftware.com/vulnerability-database/CVE-2022-23066
