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High · 7.5 CVE-2024-43366 EUVD-2024-40254

zkvyper ignored loop range bounds

Published Aug 15, 2024 · Updated Aug 16, 2024 · Assigned by GitHub_M

Description

zkvyper is a Vyper compiler. Starting in version 1.3.12 and prior to version 1.5.3, since LLL IR has no Turing-incompletness restrictions, it is compiled to a loop with a much more late exit condition. It leads to a loss of funds or other unwanted behavior if the loop body contains it. However, more real-life use cases like iterating over an array are not affected. No contracts were affected by this issue, which was fixed in version 1.5.3. Upgrading and redeploying affected contracts is the only way to avoid the vulnerability.

Affected products

VendorProductAffectedFixed
matter-labs era-compiler-vyper >= 1.3.12, < 1.5.3 —

References