On Feb 24th, the post-mortem describing three white-hacks on Primitive Finance was released. More than one month after the post-mortem release, we identified a vulnerable user with ~$1M (500 WETH) at risk on April 14. By reproducing the white-hacks, we demonstrated our findings to Primitive Finance via ImmuneFi and helped the victim at risk reset the allowance. Below, we outline how we exploited the loophole on a simulated platform and identified the victim using blockchain data analytics.
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