GHSA-7f92-rr6w-cq64: Vyper Storage Corruption Due To Variables Vulnerability

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Advisory Summary

GHSA-7f92-rr6w-cq64 is a HIGH storage corruption due to variables vulnerability (General Security Weakness) affecting Vyper libraries in the PyPI ecosystem. The issue involves storage corruption due to variables overwritten by re-entrancy locks. Remediation is available by upgrading affected packages to version 0.2.15.

GHSA-7f92-rr6w-cq64 at a Glance

CVE Identifier N/A
GHSA Identifier GHSA-7f92-rr6w-cq64
Severity HIGH
CVSS v3.1 Base Score N/A
CWE Classification General Security Weakness
Affected Product Vyper
Package Ecosystem PyPI
Published Date
Last Updated

How to Fix GHSA-7f92-rr6w-cq64

To remediate this vulnerability, upgrade all affected Vyper 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: 0.2.15 
pip install vyper>=0.2.15
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-7f92-rr6w-cq64, inspect your installed packages using pip:

pip show vyper

Analyze the terminal output to locate any version of Vyper in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.2.15), 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 General Security Weakness. In Vyper, 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

### Background When attempting to use the v0.2.14 release, @pandadefi discovered an issue using the `@nonreentrant` decorator. ### Impact Reentrancy protection storage slots get allocated to the same slots as storage variables, leading to the corruption of storage variables when using the `@nonreentrant` decorator. ### Patches This issue was fixed in v0.2.15 in #2391, #2379 ### Workarounds Don't use the `@nonreentrant` decorator in these versions.

GHSA-7f92-rr6w-cq64 Affected Vyper Versions

1 component(s)
Fixed Versions:
0.2.15
Product / Package Ecosystem Affected Versions Fixed Version
vyper
pypi/vyper
PyPI
≥ 0.2.13
< 0.2.15
0.2.15

References

GitHub Advisory / Wiki ADVISORY
https://github.com/vyperlang/vyper/security/advisories/GHSA-7f92-rr6w-cq64
Vyper Source Repository REPOSITORY
https://github.com/vyperlang/vyper/pull/2379
Vyper Source Repository REPOSITORY
https://github.com/vyperlang/vyper/pull/2391

Frequently Asked Questions

What is GHSA-7f92-rr6w-cq64?
GHSA-7f92-rr6w-cq64 is a security vulnerability in Vyper involving Storage corruption due to variables overwritten by re-entrancy locks under General Security Weakness.
Which Vyper versions are affected?
Affected versions include releases prior to 0.2.15 across affected packages: vyper.
What version fixes GHSA-7f92-rr6w-cq64?
Upgrading to 0.2.15 (or the latest patched release for your respective branch) resolves the vulnerability.
Is vyper affected?
Yes, vyper is affected in releases prior to 0.2.15. Upgrade your dependency to 0.2.15 or later.
What CWE is associated with GHSA-7f92-rr6w-cq64?
GHSA-7f92-rr6w-cq64 is classified under General Security Weakness.
How can I check PyPI dependencies for GHSA-7f92-rr6w-cq64?
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-7f92-rr6w-cq64",
  "modified" : "2021-08-02T19:12:30Z",
  "published" : "2021-08-05T16:57:42Z",
  "aliases" : [ ],
  "summary" : "Storage corruption due to variables overwritten by re-entrancy locks",
  "details" : "### Background\nWhen attempting to use the v0.2.14 release, @pandadefi discovered an issue using the `@nonreentrant` decorator.\n\n### Impact\nReentrancy protection storage slots get allocated to the same slots as storage variables, leading to the corruption of storage variables when using the `@nonreentrant` decorator.\n\n### Patches\nThis issue was fixed in v0.2.15 in #2391, #2379\n\n### Workarounds\nDon't use the `@nonreentrant` decorator in these versions.",
  "severity" : [ ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "vyper"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0.2.13"
      }, {
        "fixed" : "0.2.15"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/vyperlang/vyper/security/advisories/GHSA-7f92-rr6w-cq64"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/vyperlang/vyper/pull/2379"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/vyperlang/vyper/pull/2391"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2021-08-02T19:12:30Z",
    "nvd_published_at" : null
  }
}