CVE-2020-15142: Openapi python client Openapi-python-client Arbitrary Code Generation Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-9x4c-63pf-525f
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CVSS 8.0
CWE-94
Published
Advisory Summary

CVE-2020-15142 is a HIGH (CVSS 8.0) openapi-python-client arbitrary code generation vulnerability vulnerability (CWE-94: Improper Control of Generation of Code ('Code Injection')) affecting Openapi python client libraries in the PyPI ecosystem. The issue involves openapi-python-client arbitrary code generation vulnerability. Remediation is available by upgrading affected packages to version 0.5.3.

CVE-2020-15142 at a Glance

CVE Identifier CVE-2020-15142
GHSA Identifier GHSA-9x4c-63pf-525f
Severity HIGH
CVSS v3.1 Base Score 8.0
CWE Classification CWE-94: Improper Control of Generation of Code ('Code Injection')
Affected Product Openapi python client
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 8.0

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H).

Attack Vector Network (AV:N)
Attack Complexity High (AC:H)
Privileges Required Low (PR:L)
User Interaction Required (UI:R)
Scope Changed (S:C)
Confidentiality High (C:H)
Integrity High (I:H)
Availability High (A:H)

How to Fix CVE-2020-15142

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

openapi-python-client fixed: 0.5.3 
pip install openapi-python-client>=0.5.3
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 openapi-python-client

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2020-15142, inspect your installed packages using pip:

pip show openapi-python-client

Analyze the terminal output to locate any version of Openapi python client in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.5.3), your application is affected.

Note: The pip show openapi-python-client command checks currently installed packages in your active Python environment.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-94: Improper Control of Generation of Code ('Code Injection'), where the product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment. In Openapi python client, 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 Clients generated with a maliciously crafted OpenAPI Document can generate arbitrary Python code. Subsequent execution of this malicious client is arbitrary code execution. Giving this a CVSS of 8.0 (high) with CVSS:3.0/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H/E:P/RL:U/RC:C . ### Patches Fix will be included in version 0.5.3 ### Workarounds Inspect OpenAPI documents before generating, or inspect generated code before executing. ### For more information If you have any questions or comments about this advisory: * Open an issue in [openapi-python-client](https://github.com/triaxtec/openapi-python-client/issues) * Email us at [danthony@triaxtec.com](mailto:danthony@triaxtec.com)

CVE-2020-15142 Affected Openapi python client Versions

1 component(s)
Fixed Versions:
0.5.3
Product / Package Ecosystem Affected Versions Fixed Version
openapi-python-client
pypi/openapi-python-client
PyPI
< 0.5.3
0.5.3

References

GitHub Advisory / Wiki ADVISORY
https://github.com/triaxtec/openapi-python-client/security/advisories/GHSA-9x4c-63pf-525f
NVD — CVE-2020-15142 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-15142
Security Fix Commit FIX COMMIT
https://github.com/openapi-generators/openapi-python-client/commit/f7a56aae32cba823a77a84a1f10400799b19c19a
Security Fix Commit FIX COMMIT
https://github.com/triaxtec/openapi-python-client/commit/f7a56aae32cba823a77a84a1f10400799b19c19a
Openapi python client Source Repository REPOSITORY
https://github.com/openapi-generators/openapi-python-client
Openapi python client Release RELEASE
https://github.com/openapi-generators/openapi-python-client/releases/tag/v.0.5.3
Openapi python client Source Repository REPOSITORY
https://github.com/pypa/advisory-database/tree/main/vulns/openapi-python-client/PYSEC-2020-71.yaml
Openapi python client Source Repository REPOSITORY
https://github.com/triaxtec/openapi-python-client/blob/main/CHANGELOG.md#053---2020-08-13
pypi.org/project/openapi-pyt... WEB
https://pypi.org/project/openapi-python-client

Frequently Asked Questions

What is CVE-2020-15142?
CVE-2020-15142 is a security vulnerability in Openapi python client involving openapi-python-client Arbitrary Code Generation vulnerability under CWE-94: Improper Control of Generation of Code ('Code Injection').
Which Openapi python client versions are affected?
Affected versions include releases prior to 0.5.3 across affected packages: openapi-python-client.
What version fixes CVE-2020-15142?
Upgrading to 0.5.3 (or the latest patched release for your respective branch) resolves the vulnerability.
Is openapi-python-client affected?
Yes, openapi-python-client is affected in releases prior to 0.5.3. Upgrade your dependency to 0.5.3 or later.
What is the CVSS score of CVE-2020-15142?
CVE-2020-15142 has a CVSS v3.1 base score of 8.0 (HIGH) with vector string CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H.
What CWE is associated with CVE-2020-15142?
CVE-2020-15142 is classified under CWE-94: Improper Control of Generation of Code ('Code Injection') (The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.).
How can I check PyPI dependencies for CVE-2020-15142?
Run the dependency tree command: 'pip show openapi-python-client'. 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-9x4c-63pf-525f",
  "modified" : "2024-10-07T16:47:52Z",
  "published" : "2020-08-20T14:38:24Z",
  "aliases" : [ "CVE-2020-15142" ],
  "summary" : "openapi-python-client Arbitrary Code Generation vulnerability",
  "details" : "### Impact\nClients generated with a maliciously crafted OpenAPI Document can generate arbitrary Python code. Subsequent execution of this malicious client is arbitrary code execution.\n\nGiving this a CVSS of 8.0 (high) with CVSS:3.0/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H/E:P/RL:U/RC:C .\n\n### Patches\nFix will be included in version 0.5.3\n\n### Workarounds\nInspect OpenAPI documents before generating, or inspect generated code before executing.\n\n### For more information\nIf you have any questions or comments about this advisory:\n* Open an issue in [openapi-python-client](https://github.com/triaxtec/openapi-python-client/issues)\n* Email us at [danthony@triaxtec.com](mailto:danthony@triaxtec.com)",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "openapi-python-client"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.5.3"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/triaxtec/openapi-python-client/security/advisories/GHSA-9x4c-63pf-525f"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-15142"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/openapi-generators/openapi-python-client/commit/f7a56aae32cba823a77a84a1f10400799b19c19a"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/triaxtec/openapi-python-client/commit/f7a56aae32cba823a77a84a1f10400799b19c19a"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/openapi-generators/openapi-python-client"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/openapi-generators/openapi-python-client/releases/tag/v.0.5.3"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/pypa/advisory-database/tree/main/vulns/openapi-python-client/PYSEC-2020-71.yaml"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/triaxtec/openapi-python-client/blob/main/CHANGELOG.md#053---2020-08-13"
  }, {
    "type" : "WEB",
    "url" : "https://pypi.org/project/openapi-python-client"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-94" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2020-08-14T16:09:33Z",
    "nvd_published_at" : null
  }
}