![]() 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. The overflow is length-dependent and thus it might go unnoticed during contract testing. The buffer overflow can result in the change of semantics of the contract. ![]() A contract search was performed and no vulnerable contracts were found in production. 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). The `concat` built-in can write over the bounds of the memory buffer that was allocated for it and thus overwrite existing valid data. It allows an attacker to cause code execution.ĬVE-2024-22419 Vyper is a Pythonic Smart Contract Language for the Ethereum Virtual Machine. ![]() CVE-2024-22919 swftools0.9.2 was discovered to contain a global-buffer-overflow vulnerability via the function parseExpression at swftools/src/swfc.c:2587.ĬVE-2024-22912 A global-buffer-overflow was found in SWFTools v0.9.2, in the function countline at swf5compiler.flex:327.
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