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SCA: security update for vyper (GHSA-52xq-j7v9-v4v2)
critical Tenable Cloud Security Plugin ID 421476
Description
There are packages installed that are affected by a vulnerability referenced in the following CVE:- Vyper is a Pythonic Smart Contract Language for the Ethereum Virtual Machine. Arrays can be keyed by a
signed integer, while they are defined for unsigned integers only. The typechecker doesn't throw when
spotting the usage of an `int` as an index for an array. The typechecker allows the usage of signed
integers to be used as indexes to arrays. The vulnerability is present in different forms in all versions,
including `0.3.10`. For ints, the 2's complement representation is used. Because the array was declared
very large, the bounds checking will pass Negative values will simply be represented as very large
numbers. As of time of publication, a fixed version does not exist. There are three potential
vulnerability classes: unpredictable behavior, accessing inaccessible elements and denial of service.
Class 1: If it is possible to index an array with a negative integer without reverting, this is most
likely not anticipated by the developer and such accesses can cause unpredictable behavior for the
contract. Class 2: If a contract has an invariant in the form `assert index < x`, the developer will
suppose that no elements on indexes `y | y >= x` are accessible. However, by using negative indexes, this
can be bypassed. Class 3: If the index is dependent on the state of the contract, this poses a risk of
denial of service. If the state of the contract can be manipulated in such way that the index will be
forced to be negative, the array access can always revert (because most likely the array won't be declared
extremely large). However, all these the scenarios are highly unlikely. Most likely behavior is a revert
on the bounds check. (CVE-2024-24563)
See Also
Plugin Details
Severity: Critical
ID: 421476
Version: Revision 1.3
Type: Local
Family: SCA Checks
Published: 3/28/2025
Updated: 7/2/2026
Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security
Risk Information
VPR
Risk Factor: Medium
Score: 4.9
Percentile: 57.58
Vendor
Vendor Severity: Critical
CVSS v2
Risk Factor: Critical
Base Score: 10
Temporal Score: 7.8
Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C
CVSS Score Source: CVE-2024-24563
CVSS v3
Risk Factor: Critical
Base Score: 9.8
Temporal Score: 8.8
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C
Vulnerability Information
Exploit Available: true
Exploit Ease: Exploits are available
Patch Publication Date: 2/7/2024
Vulnerability Publication Date: 2/7/2024
Reference Information
CVE: CVE-2024-24563
cwe: CWE-129