vyper vulnerable to storage allocator overflow
### Impact The storage allocator does not guard against allocation overflows. This can result in vulnerabilities like the following: ```vyper owner: public(address) take_up_some_space: public(uint256[10]) buffer: public(uint256[max_value(uint256)]) @external def initialize(): self.owner = msg.sender @external def foo(idx: uint256, data: uint256): self.buffer[idx] = data ``` Per @toonvanhove, "An attacker can overwrite the owner variable by calling this contract with calldata: `0x04bc52f8 fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff5 ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff` (spaces inserted for readability) `0x04bc52f8` is the selector for `foo(uint256, uint256)`, and the last argument `fff...fff` is the new value for the owner variable." ### Patches patched in 0bb7203b584e771b23536ba065a6efda457161bb ### Workarounds _Is there a way for users to fix or remediate the vulnerability without upgrading?_ ### References _Are there any links users can visit to find out more?_
beschreibt (1)
Zugehörige CVEs.
| ID | Schweregrad | ausnutzbar | ||
|---|---|---|---|---|
| CVE-2023-30837US | high7.5 | — | ||
Vyper is a pythonic smart contract language for the EVM. The storage allocator does not guard against allocation overflows in versions prior to 0.3.8. An attacker can overwrite the… | ||||
Referenzen
Externe Belege — Patches, Meldungen, Analysen.
- https://github.com/pypa/advisory-database/tree/main/vulns/vyper/PYSEC-2023-76.yamlWEB
- https://github.com/vyperlang/vyperPACKAGE
- https://github.com/vyperlang/vyper/commit/0bb7203b584e771b23536ba065a6efda457161bbWEB
- https://github.com/vyperlang/vyper/security/advisories/GHSA-mgv8-gggw-mrg6WEB
- https://nvd.nist.gov/vuln/detail/CVE-2023-30837ADVISORY
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