GHSA-22wc-c9wj-6q2v: VVE-2021-0001 Memory Corruption Using Function Calls Vulnerability

MODERATE
Share
CWE-129
Published
Advisory Summary

GHSA-22wc-c9wj-6q2v is a MODERATE memory corruption using function calls vulnerability (CWE-129: Improper Validation of Array Index) affecting VVE-2021-0001 libraries in the PyPI ecosystem. The issue involves memory corruption using function calls within arrays. Remediation is available by upgrading affected packages to version 0.2.12.

GHSA-22wc-c9wj-6q2v at a Glance

CVE Identifier N/A
GHSA Identifier GHSA-22wc-c9wj-6q2v
Severity MODERATE
CVSS v3.1 Base Score N/A
CWE Classification CWE-129: Improper Validation of Array Index
Affected Product VVE-2021-0001
Package Ecosystem PyPI
Published Date
Last Updated

How to Fix GHSA-22wc-c9wj-6q2v

To remediate this vulnerability, upgrade all affected VVE-2021-0001 dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

vyper fixed: 0.2.12 
pip install vyper>=0.2.12
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

pip show vyper

How to Check if You Are Affected

To determine whether your Python environment is affected by GHSA-22wc-c9wj-6q2v, inspect your installed packages using pip:

pip show vyper

Analyze the terminal output to locate any version of VVE-2021-0001 in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.2.12), your application is affected.

Note: The pip show vyper command checks currently installed packages in your active Python environment.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-129: Improper Validation of Array Index, where the product uses untrusted input when calculating or using an array index, but the product does not validate or incorrectly validates the index to ensure the index references a valid position within the array. In VVE-2021-0001, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

### Impact When performing a function call inside an array, there is a memory corruption issue that occurs because of an incorrect pointer to the the tip of the stack. ### Patches This issue was partially fixed in [VVE-2020-0004](https://github.com/vyperlang/vyper/security/advisories/GHSA-2r3x-4mrv-mcxf), however the fix did not update similar code for arrays, which had a similar issue. The issue is fully fixed in https://github.com/vyperlang/vyper/pull/2345

GHSA-22wc-c9wj-6q2v Affected VVE-2021-0001 Versions

1 component(s)
Fixed Versions:
0.2.12
Product / Package Ecosystem Affected Versions Fixed Version
vyper
pypi/vyper
PyPI
< 0.2.12
0.2.12

References

GitHub Advisory / Wiki ADVISORY
https://github.com/vyperlang/vyper/security/advisories/GHSA-22wc-c9wj-6q2v
VVE-2021-0001 Source Repository REPOSITORY
https://github.com/vyperlang/vyper/pull/2345
Security Fix Commit FIX COMMIT
https://github.com/vyperlang/vyper/commit/11b7b5b7e59bc9dc859d51cd41a924b59fe47c9e
pypi.org/project/vyper WEB
https://pypi.org/project/vyper

Frequently Asked Questions

What is GHSA-22wc-c9wj-6q2v?
GHSA-22wc-c9wj-6q2v is a security vulnerability in VVE-2021-0001 involving Memory corruption using function calls within arrays under CWE-129: Improper Validation of Array Index.
Which VVE-2021-0001 versions are affected?
Affected versions include releases prior to 0.2.12 across affected packages: vyper.
What version fixes GHSA-22wc-c9wj-6q2v?
Upgrading to 0.2.12 (or the latest patched release for your respective branch) resolves the vulnerability.
Is vyper affected?
Yes, vyper is affected in releases prior to 0.2.12. Upgrade your dependency to 0.2.12 or later.
What CWE is associated with GHSA-22wc-c9wj-6q2v?
GHSA-22wc-c9wj-6q2v is classified under CWE-129: Improper Validation of Array Index (The product uses untrusted input when calculating or using an array index, but the product does not validate or incorrectly validates the index to ensure the index references a valid position within the array.).
How can I check PyPI dependencies for GHSA-22wc-c9wj-6q2v?
Run the dependency tree command: 'pip show vyper'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-22wc-c9wj-6q2v",
  "modified" : "2021-04-16T23:11:53Z",
  "published" : "2021-04-19T15:12:05Z",
  "aliases" : [ ],
  "summary" : "VVE-2021-0001: Memory corruption using function calls within arrays",
  "details" : "### Impact\nWhen performing a function call inside an array, there is a memory corruption issue that occurs because of an incorrect pointer to the the tip of the stack.\n\n### Patches\nThis issue was partially fixed in [VVE-2020-0004](https://github.com/vyperlang/vyper/security/advisories/GHSA-2r3x-4mrv-mcxf), however the fix did not update similar code for arrays, which had a similar issue. The issue is fully fixed in https://github.com/vyperlang/vyper/pull/2345",
  "severity" : [ ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "vyper"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.2.12"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/vyperlang/vyper/security/advisories/GHSA-22wc-c9wj-6q2v"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/vyperlang/vyper/pull/2345"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/vyperlang/vyper/commit/11b7b5b7e59bc9dc859d51cd41a924b59fe47c9e"
  }, {
    "type" : "WEB",
    "url" : "https://pypi.org/project/vyper"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-129" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2021-04-16T23:11:53Z",
    "nvd_published_at" : null
  }
}