GHSA-ph9x-4vc9-m39g Vyper vulnerable to incorrect ordering of arguments for kwargs passed to internal calls

• PyPI vyper: < 0.3.8 → fixed in 0.3.8

Impact Internal calls to internal functions with more than 1 default argument are compiled incorrectly. Depending on the number of arguments provided in the call, the defaults are added not right-to-left, but left-to-right. If the types are incompatible, typechecking is bypassed. In the `bar()` function in the following code, `self.foo(13)` is compiled to `self.foo(13,12)` instead of `self.foo(13,1337)`. ```vyper @internal def foo(a:uint256 = 12, b:uint256 = 1337): pass @internal def bar(): self.foo(13) ``` note that at the time of publication, the ability to pass kwargs to internal functions is an undocumented feature that does not seem to be widely used. Patches patched in c3e68c302aa6e1429946473769dd1232145822ac Workarounds _Is there a way for users to fix or remediate the vulnerability without upgrading?_ References _Are there any links users can visit to find out more?_