CVE-2024-22419
concat built-in can corrupt memory in vyper
描述
Vyper is a Pythonic Smart Contract Language for the Ethereum Virtual Machine. The `concat` built-in can write over the bounds of the memory buffer that was allocated for it and thus overwrite existing valid data. The root cause is that the `build_IR` for `concat` doesn't properly adhere to the API of copy functions (for `>=0.3.2` the `copy_bytes` function). A contract search was performed and no vulnerable contracts were found in production. The buffer overflow can result in the change of semantics of the contract. The overflow is length-dependent and thus it might go unnoticed during contract testing. However, certainly not all usages of concat will result in overwritten valid data as we require it to be in an internal function and close to the return statement where other memory allocations don't occur. This issue has been addressed in 0.4.0.
如何修補 CVE-2024-22419
要修補 CVE-2024-22419,請將受影響套件升級到下列已修補版本。
- —升級至 0.4.0 或更新版本
- —升級至 55e18f6d128b2da8986adbbcccf1cd59a4b9ad6f 或更新版本
CVE-2024-22419 正在被利用嗎?
低 — EPSS 為 0.8%,目前沒有觀察到大規模利用活動。
受影響套件(2)
- >= 0.3.0, < 0.4.0
- from 0, < 55e18f6d128b2da8986adbbcccf1cd59a4b9ad6f | from 0, < 0.4.0b1
CVSS 分數
| 來源 | 版本 | 嚴重程度 | 向量 |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L |