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GHSA-ph9x-4vc9-m39g
No affected components available
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).
@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?
The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker does not need any special privileges or access rights. No user interaction is needed for the attacker to exploit this vulnerability. The impact is confined to the system where the vulnerability exists. There is a high impact on the integrity of the data.
Exploitation attempts have been detected. Elevated vigilance and prompt remediation are advised.
The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
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