Vyper up to 0.3.7 codegen out-of-bounds write

CVSS Meta Temp Score
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CTI Interest Score
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8.4$0-$5k0.00

Summaryinfo

A vulnerability was found in Vyper up to 0.3.7. It has been declared as critical. The affected element is an unknown function of the component codegen. Executing a manipulation can lead to out-of-bounds write. This vulnerability is registered as CVE-2023-31146. It is possible to launch the attack remotely. No exploit is available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Vyper up to 0.3.7. It has been declared as critical. This vulnerability affects some unknown processing of the component codegen. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. The CWE definition for the vulnerability is CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

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.

The weakness was published 05/12/2023 as GHSA-3p37-3636-q8wv. The advisory is available at github.com. This vulnerability was named CVE-2023-31146 since 04/24/2023. The technical details are unknown and an exploit is not available.

Upgrading to version 0.3.8 eliminates this vulnerability. Applying the patch 4f8289a81206f767df1900ac48f485d90fc87edb is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.5
VulDB Meta Temp Score: 8.4

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.1
NVD Vector: 🔍

CNA Base Score: 9.1
CNA Vector (GitHub, Inc.): 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Out-of-bounds write
CWE: CWE-787 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Vyper 0.3.8
Patch: 4f8289a81206f767df1900ac48f485d90fc87edb

Timelineinfo

04/24/2023 🔍
05/12/2023 +18 days 🔍
05/12/2023 +0 days 🔍
01/24/2025 +623 days 🔍

Sourcesinfo

Advisory: GHSA-3p37-3636-q8wv
Status: Confirmed

CVE: CVE-2023-31146 (🔍)
GCVE (CVE): GCVE-0-2023-31146
GCVE (VulDB): GCVE-100-228850

Entryinfo

Created: 05/12/2023 07:24
Updated: 01/24/2025 17:25
Changes: 05/12/2023 07:24 (52), 06/08/2023 01:18 (11), 01/24/2025 17:25 (19)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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