GitHub_MCVELIST:CVE-2023-31146CVE-2023-31146 Vyper vulnerable to OOB DynArray access when array is on both LHS and RHS of an assignment
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
9.5 High
AI Score
Confidence
High
0.001 Low
EPSS
Percentile
43.5%
Vyper is a Pythonic smart contract language for the Ethereum virtual machine. Prior to version 0.3.8, during codegen, the length word of a dynarray is written before the data, which can result in out-of-bounds array access in the case where the dynarray is on both the lhs and rhs of an assignment. The issue can cause data corruption across call frames. The expected behavior is to revert due to out-of-bounds array access. Version 0.3.8 contains a patch for this issue.
CNA Affected
[
{
"vendor": "vyperlang",
"product": "vyper",
"versions": [
{
"version": "< 0.3.8",
"status": "affected"
}
]
}
]Related
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
9.5 High
AI Score
Confidence
High
0.001 Low
EPSS
Percentile
43.5%