CVE-2025-27104

描述

vyper is a Pythonic Smart Contract Language for the EVM. Multiple evaluation of a single expression is possible in the iterator target of a for loop. While the iterator expression cannot produce multiple writes, it can consume side effects produced in the loop body (e.g. read a storage variable updated in the loop body) and thus lead to unexpected program behavior. Specifically, reads in iterators which contain an ifexp (e.g. `for s: uint256 in ([read(), read()] if True else [])`) may interleave reads with writes in the loop body. Vyper for loops allow two kinds of iterator targets, namely the `range()` builtin and an iterable type, like SArray and DArray. During codegen, iterable lists are required to not produce any side-effects (in the following code, `range_scope` forces `iter_list` to be parsed in a constant context, which is checked against `is_constant`). However, this does not prevent the iterator from consuming side effects provided by the body of the loop. For SArrays on the other hand, `iter_list` is instantiated in the body of a `repeat` ir, so it can be evaluated several times. This issue is being addressed and is expected to be available in version 0.4.1. Users are advised to upgrade as soon as the patched release is available. There are no known workarounds for this vulnerability.

如何修補 CVE-2025-27104

要修補 CVE-2025-27104,請將受影響套件升級到下列已修補版本。

• —升級至 0.4.1 或更新版本
• —升級至 0.4.1 或更新版本

CVE-2025-27104 正在被利用嗎?

低 — EPSS 為 0.4%,目前沒有觀察到大規模利用活動。

受影響套件(2)

• from 0, < 0.4.1
• from 0, < 0.4.1

CVSS 分數

參考連結(5)

• ADVISORYnvd.nist.gov/vuln/detail/CVE-2025-27104
• PATCHgithub.com/vyperlang/vyper
• WEBgithub.com/pypa/advisory-database/tree/main/vulns/vyper/PYSEC-2025-30.yaml
• WEBgithub.com/vyperlang/vyper/pull/4488
• WEB