CVE-2022-31573: Chainerrl visualizer Path Traversal Vulnerability

CRITICAL
Advisory Identifier: GHSA-687h-86vc-5x59
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CVSS 9.3
CWE-22
Published
Advisory Summary

CVE-2022-31573 is a CRITICAL (CVSS 9.3) path traversal vulnerability (CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')) affecting Chainerrl visualizer libraries in the PyPI ecosystem. The issue involves chainerrl visualizer 0.1.1 vulnerable to path traversal via unsafe use of send_file function. Remediation is available in the latest vendor maintenance releases.

CVE-2022-31573 at a Glance

CVE Identifier CVE-2022-31573
GHSA Identifier GHSA-687h-86vc-5x59
Severity CRITICAL
CVSS v3.1 Base Score 9.3
CWE Classification CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Affected Product Chainerrl visualizer
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 9.3

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

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Changed (S:C)
Confidentiality High (C:H)
Integrity None (I:N)
Availability Low (A:L)

How to Fix CVE-2022-31573

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

chainerrl-visualizer fixed: Latest secure release 
pip install chainerrl-visualizer>=Latest secure release
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 chainerrl-visualizer

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2022-31573, inspect your installed packages using pip:

pip show chainerrl-visualizer

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

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

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal'), where the product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. In Chainerrl visualizer, 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

The chainer/chainerrl-visualizer repository through 0.1.1 on GitHub allows absolute path traversal because the Flask send_file function is used unsafely.

CVE-2022-31573 Affected Chainerrl visualizer Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
chainerrl-visualizer
pypi/chainerrl-visualizer
PyPI
≤ 0.1.1

References

NVD — CVE-2022-31573 NVD
https://nvd.nist.gov/vuln/detail/CVE-2022-31573
Chainerrl visualizer Source Repository REPOSITORY
https://github.com/github/securitylab/issues/669#issuecomment-1117265726
Chainerrl visualizer Source Repository REPOSITORY
https://github.com/chainer/chainerrl-visualizer

Frequently Asked Questions

What is CVE-2022-31573?
CVE-2022-31573 is a security vulnerability in Chainerrl visualizer involving ChainerRL Visualizer 0.1.1 vulnerable to Path Traversal via unsafe use of send_file function under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal').
Which Chainerrl visualizer versions are affected?
Affected versions include releases prior to current release patches across affected packages: chainerrl-visualizer.
What version fixes CVE-2022-31573?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is chainerrl-visualizer affected?
Yes, chainerrl-visualizer is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What is the CVSS score of CVE-2022-31573?
CVE-2022-31573 has a CVSS v3.1 base score of 9.3 (CRITICAL) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:L.
What CWE is associated with CVE-2022-31573?
CVE-2022-31573 is classified under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') (The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.).
How can I check PyPI dependencies for CVE-2022-31573?
Run the dependency tree command: 'pip show chainerrl-visualizer'. 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-687h-86vc-5x59",
  "modified" : "2022-07-21T20:45:59Z",
  "published" : "2022-07-12T00:00:58Z",
  "aliases" : [ "CVE-2022-31573" ],
  "summary" : "ChainerRL Visualizer 0.1.1 vulnerable to Path Traversal via unsafe use of send_file function",
  "details" : "The chainer/chainerrl-visualizer repository through 0.1.1 on GitHub allows absolute path traversal because the Flask send_file function is used unsafely.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:L"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "chainerrl-visualizer"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "0.1.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2022-31573"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/github/securitylab/issues/669#issuecomment-1117265726"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/chainer/chainerrl-visualizer"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-22" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-07-21T20:45:59Z",
    "nvd_published_at" : "2022-07-11T01:15:00Z"
  }
}