Vulnerability Details : CVE-2023-42460
Vyper is a Pythonic Smart Contract Language for the EVM. The `_abi_decode()` function does not validate input when it is nested in an expression. Uses of `_abi_decode()` can be constructed which allow for bounds checking to be bypassed resulting in incorrect results. This issue has not yet been fixed, but a fix is expected in release `0.3.10`. Users are advised to reference pull request #3626.
Products affected by CVE-2023-42460
- cpe:2.3:a:vyperlang:vyper:*:*:*:*:*:python:*:*
Exploit prediction scoring system (EPSS) score for CVE-2023-42460
0.08%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 34 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2023-42460
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
7.5
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
3.9
|
3.6
|
NIST | |
|
5.3
|
MEDIUM | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N |
1.6
|
3.6
|
GitHub, Inc. |
CWE ids for CVE-2023-42460
-
The product performs a calculation that generates incorrect or unintended results that are later used in security-critical decisions or resource management.Assigned by: security-advisories@github.com (Primary)
References for CVE-2023-42460
-
https://github.com/vyperlang/vyper/pull/3626
fix: `_abi_decode()` validation by charles-cooper · Pull Request #3626 · vyperlang/vyper · GitHubPatch
-
https://github.com/vyperlang/vyper/security/advisories/GHSA-cx2q-hfxr-rj97
_abi_decode input not validated in certain complex expressions · Advisory · vyperlang/vyper · GitHubExploit;Patch;Third Party Advisory
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