Hawk High
First Flight #39
Beginner FriendlySolidity
100 EXP
View results
Previous Next
Submission Details
Severity: medium
Valid

Upgrading `LevelOne` with `LevelTwo` will cause storage clash, leading to incorrect storage variable values

toddorov

[H-4] Upgrading LevelOne with LevelTwo will cause storage clash, leading to incorrect storage variable values

Description: After upgrading LevelOne to LevelTwo, the storage variables will clash, leading to incorrect values, Making the whole contract unusable. Will cause TEACHERS_WAGE to be increased to 40% instead of 35%, breaking the invariant.

Impact: Values of storage variables will be incorrect.

Proof of Concepts:

Recommended mitigation: All variables in LevelOne should match in order in LevelTwo, so that upgrade could be done safely.

Updates

Lead Judging Commences

yeahchibyke Lead Judge 3 months ago
Submission Judgement Published
Validated
Assigned finding tags:

storage collision

yeahchibyke Lead Judge 3 months ago
Submission Judgement Published
Validated
Assigned finding tags:

storage collision

Support

FAQs

Can't find an answer? Chat with us on Discord, Twitter or Linkedin.