CVE-2024-22419 (GCVE-0-2024-22419)
Vulnerability from cvelistv5 – Published: 2024-01-18 18:45 – Updated: 2025-06-02 15:03
VLAI
EPSS
VEX
Title
concat built-in can corrupt memory in vyper
Summary
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.
Severity
7.3 (High)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-05-08 15:34 UTC
CWE
- CWE-120 - Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
Assigner
GitHub_M
CNA
References
3 references
| URL | Tags |
|---|---|
| https://github.com/vyperlang/vyper/security/advis… | x_refsource_CONFIRM |
| https://github.com/vyperlang/vyper/issues/3737 | x_refsource_MISC |
| https://github.com/vyperlang/vyper/commit/55e18f6… | x_refsource_MISC |
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Browse all ATT&CK techniques and the vulnerabilities related to each.
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