The group behind the Balancer protocol has launched its first replace following a safety breach that led to losses of round $116 million.
The report outlines how the incident occurred and the steps taken to date.
The assault occurred on November 3 and affected two particular pool varieties inside Balancer: v2 Steady Swimming pools and Composable Steady v5 Swimming pools.
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Based on the group, the attacker used a mix of transaction bundling, known as BatchSwaps, and flash loans, that are short-term loans taken and repaid in a single transaction. The exploit relied on a flaw within the system’s rounding mechanism, utilized in sure kinds of token swaps.
Usually, this perform rounds values downward, however the attacker was capable of affect how rounding labored of their favor.
By combining the rounding flaw with the bundled transactions, the attacker was capable of extract funds from the focused swimming pools. Balancer famous that, in lots of instances, the stolen belongings have been first held within the platform’s inside steadiness system earlier than being moved out in later transactions.
Following the assault, Balancer labored with different blockchain safety teams and protocol groups to get well or freeze a few of the stolen belongings. This included recovering about $19 million value of StakeWise Staked ETH (osETH) and round $2 million in osGNO tokens.
To forestall additional harm, Balancer has paused all affected swimming pools and has briefly stopped customers from creating new swimming pools of the identical sort.
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