CVE-2024-32648
published 2024-04-25CVE-2024-32648: Vyper is a pythonic Smart Contract Language for the Ethereum virtual machine. Prior to version 0.3.0, default functions don't respect nonreentrancy keys and…
PriorityP428medium5.3CVSS 3.1
AVNACLPRNUINSUCNILAN
EPSS
0.41%
33.6th percentile
Vyper is a pythonic Smart Contract Language for the Ethereum virtual machine. Prior to version 0.3.0, default functions don't respect nonreentrancy keys and the lock isn't emitted. No vulnerable production contracts were found. Additionally, using a lock on a `default` function is a very sparsely used pattern. As such, the impact is low. Version 0.3.0 contains a patch for the issue.
Affected
4 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| vyperlang | vyper | < 0.3.0 | 0.3.0 |
| vyperlang | vyper | < 93287e5ac184b53b395c907d40701f721daf8177 | 93287e5ac184b53b395c907d40701f721daf8177 |
| vyperlang | vyper | >= 0 < 0.3.0 | 0.3.0 |
| vyperlang | vyper | >= 0 < 93287e5ac184b53b395c907d40701f721daf8177 | 93287e5ac184b53b395c907d40701f721daf8177 |
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OSV
vyper default functions don't respect nonreentrancy keys
osv·2024-04-25
CVE-2024-32648 [MEDIUM] vyper default functions don't respect nonreentrancy keys
vyper default functions don't respect nonreentrancy keys
### Summary
Prior to v0.3.0, `__default__()` functions did not respect the `@nonreentrancy` decorator and the lock was not emitted. This is a known bug and was already visible in the issue tracker (https://github.com/vyperlang/vyper/issues/2455), but it is being re-issued as an advisory so that tools relying on the advisory publication list can incorporate it into their searches.
A contract search was additionally performed and no vulnerable contracts were found in production.
### PoC
```vyper
@external
@payable
@nonreentrant("default")
def __default__():
pass
```
after codegen:
```
[seq,
[if, [lt, calldatasize, 4], [goto, fallback]],
[mstore, 28, [calldataload, 0]],
[with, _func_sig, [mload, 0], seq],
[seq_unchecked,
[label, fal
OSV
CVE-2024-32648: Vyper is a pythonic Smart Contract Language for the Ethereum virtual machine
osv·2024-04-25
CVE-2024-32648 CVE-2024-32648: Vyper is a pythonic Smart Contract Language for the Ethereum virtual machine
Vyper is a pythonic Smart Contract Language for the Ethereum virtual machine. Prior to version 0.3.0, default functions don't respect nonreentrancy keys and the lock isn't emitted. No vulnerable production contracts were found. Additionally, using a lock on a `default` function is a very sparsely used pattern. As such, the impact is low. Version 0.3.0 contains a patch for the issue.
GHSA
vyper default functions don't respect nonreentrancy keys
ghsa·2024-04-25
CVE-2024-32648 [MEDIUM] CWE-667 vyper default functions don't respect nonreentrancy keys
vyper default functions don't respect nonreentrancy keys
### Summary
Prior to v0.3.0, `__default__()` functions did not respect the `@nonreentrancy` decorator and the lock was not emitted. This is a known bug and was already visible in the issue tracker (https://github.com/vyperlang/vyper/issues/2455), but it is being re-issued as an advisory so that tools relying on the advisory publication list can incorporate it into their searches.
A contract search was additionally performed and no vulnerable contracts were found in production.
### PoC
```vyper
@external
@payable
@nonreentrant("default")
def __default__():
pass
```
after codegen:
```
[seq,
[if, [lt, calldatasize, 4], [goto, fallback]],
[mstore, 28, [calldataload, 0]],
[with, _func_sig, [mload, 0], seq],
[seq_unchecked,
[label, fal
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
https://github.com/vyperlang/vyper/commit/93287e5ac184b53b395c907d40701f721daf8177https://github.com/vyperlang/vyper/issues/2455https://github.com/vyperlang/vyper/security/advisories/GHSA-m2v9-w374-5hj9https://github.com/vyperlang/vyper/commit/93287e5ac184b53b395c907d40701f721daf8177https://github.com/vyperlang/vyper/issues/2455https://github.com/vyperlang/vyper/security/advisories/GHSA-m2v9-w374-5hj9
2024-04-25
Published