CVE-2022-35410: Mat2 Path Traversal Vulnerability

HIGH
Advisory Identifier: GHSA-f33p-9287-h552
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CVSS 7.5
CWE-22
Published
Advisory Summary

CVE-2022-35410 is a HIGH (CVSS 7.5) path traversal vulnerability (CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')) affecting Mat2 libraries in the PyPI ecosystem. The issue involves mat2 before 0.13.0 allows directory traversal during the zip archive cleaning process.. Remediation is available by upgrading affected packages to version 0.13.0.

CVE-2022-35410 at a Glance

CVE Identifier CVE-2022-35410
GHSA Identifier GHSA-f33p-9287-h552
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Affected Product Mat2
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 7.5

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:U/C:H/I:N/A:N).

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

How to Fix CVE-2022-35410

To remediate this vulnerability, upgrade all affected Mat2 dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

mat2 fixed: 0.13.0 
pip install mat2>=0.13.0
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 mat2

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2022-35410, inspect your installed packages using pip:

pip show mat2

Analyze the terminal output to locate any version of Mat2 in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.13.0), your application is affected.

Note: The pip show mat2 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 Mat2, 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

mat2 (aka metadata anonymisation toolkit) before 0.13.0 allows `../` directory traversal during the ZIP archive cleaning process. This primarily affects mat2 web instances, in which clients could obtain sensitive information via a crafted archive.

CVE-2022-35410 Affected Mat2 Versions

1 component(s)
Fixed Versions:
0.13.0
Product / Package Ecosystem Affected Versions Fixed Version
mat2
pypi/mat2
PyPI
< 0.13.0
0.13.0

References

NVD — CVE-2022-35410 NVD
https://nvd.nist.gov/vuln/detail/CVE-2022-35410
0xacab.org/jvoisin/mat2 PACKAGE
https://0xacab.org/jvoisin/mat2
0xacab.org/jvoisin/mat2/-/comm... WEB
https://0xacab.org/jvoisin/mat2/-/commit/beebca4bf1cd3b935824c966ce077e7bcf610385
0xacab.org/jvoisin/mat2/-/issu... WEB
https://0xacab.org/jvoisin/mat2/-/issues/174
dustri.org/b/mat2-0130.html WEB
https://dustri.org/b/mat2-0130.html
GitHub Advisory / Wiki ADVISORY
https://github.com/advisories/GHSA-f33p-9287-h552
Mat2 Source Repository REPOSITORY
https://github.com/pypa/advisory-database/tree/main/vulns/mat2/PYSEC-2022-223.yaml
Mat2 Security Information SECURITY
https://www.debian.org/security/2022/dsa-5185

Frequently Asked Questions

What is CVE-2022-35410?
CVE-2022-35410 is a security vulnerability in Mat2 involving mat2 before 0.13.0 allows directory traversal during the ZIP archive cleaning process. under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal').
Which Mat2 versions are affected?
Affected versions include releases prior to 0.13.0 across affected packages: mat2.
What version fixes CVE-2022-35410?
Upgrading to 0.13.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is mat2 affected?
Yes, mat2 is affected in releases prior to 0.13.0. Upgrade your dependency to 0.13.0 or later.
What is the CVSS score of CVE-2022-35410?
CVE-2022-35410 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
What CWE is associated with CVE-2022-35410?
CVE-2022-35410 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-2022-35410?
Run the dependency tree command: 'pip show mat2'. 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-f33p-9287-h552",
  "modified" : "2024-09-30T16:59:01Z",
  "published" : "2022-07-12T18:15:29Z",
  "aliases" : [ "CVE-2022-35410" ],
  "summary" : "mat2 before 0.13.0 allows directory traversal during the ZIP archive cleaning process.",
  "details" : "mat2 (aka metadata anonymisation toolkit) before 0.13.0 allows `../` directory traversal during the ZIP archive cleaning process. This primarily affects mat2 web instances, in which clients could obtain sensitive information via a crafted archive.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "mat2"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.13.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2022-35410"
  }, {
    "type" : "PACKAGE",
    "url" : "https://0xacab.org/jvoisin/mat2"
  }, {
    "type" : "WEB",
    "url" : "https://0xacab.org/jvoisin/mat2/-/commit/beebca4bf1cd3b935824c966ce077e7bcf610385"
  }, {
    "type" : "WEB",
    "url" : "https://0xacab.org/jvoisin/mat2/-/issues/174"
  }, {
    "type" : "WEB",
    "url" : "https://dustri.org/b/mat2-0130.html"
  }, {
    "type" : "ADVISORY",
    "url" : "https://github.com/advisories/GHSA-f33p-9287-h552"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/pypa/advisory-database/tree/main/vulns/mat2/PYSEC-2022-223.yaml"
  }, {
    "type" : "WEB",
    "url" : "https://www.debian.org/security/2022/dsa-5185"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-22" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-07-12T18:15:29Z",
    "nvd_published_at" : "2022-07-08T18:15:00Z"
  }
}