Incident Overview
Save (formerly Solend) is an algorithmic, decentralized protocol for lending and borrowing on Solana. Lending and borrowing has proven itself as being key in a DeFi ecosystem. However, current products are slow and expensive.
On Solana, Solend can scale to being 100x faster and 100x cheaper. Solend aims to be the easiest to use and most secure solution on Solana.
Incident Report
Protocol Information
What the Attacker Needed to Succeed
Understanding the prerequisites for this type of attack helps auditors identify protocols that are most at risk and helps developers build better defenses.
What Auditors Should Check
If you're auditing a protocol with similar architecture to Save, these are the critical security checks that could have prevented this incident (November 2022).
- Verify all logic paths related to Price Oracle Attack are guarded by proper access controls and input validation - see the Oracle Manipulation & Price Manipulation attack class for patterns
- Audit oracle price feeds for manipulation risks - ensure time-weighted average prices (TWAPs) or multi-source aggregators are used, not spot prices
- Review privileged functions (owner, admin, governance) for potential abuse vectors - centralization risks should be documented and bounded with timelocks or multi-sigs
Master these auditing techniques with hands-on labs and real exploit scenarios in the Smart Contract Hacking course.
Free TrialSecurity Audit History
- Audit Report 1 Report
Related Attack Classes
The technique used in this hack maps to these vulnerability classes in our security curriculum:
Sources & References
Learn to Prevent the Next Save
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