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CVE-2020-28337: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

February 10, 2022

A directory traversal issue in the Utils/Unzip module in Microweber through 1.1.20 allows an authenticated attacker to gain remote code execution via the backup restore feature. To exploit the vulnerability, an attacker must have the credentials of an administrative user, upload a maliciously constructed ZIP file with file paths including relative paths (i.e., ../../), move this file into the backup directory, and execute a restore on this file.

References

  • packetstormsecurity.com/files/162514/Microweber-CMS-1.1.20-Remote-Code-Execution.html
  • github.com/advisories/GHSA-pqcf-v8v5-jmcg
  • github.com/microweber/microweber/commit/777ee9c3e7519eb3672c79ac41066175b2001b50
  • nvd.nist.gov/vuln/detail/CVE-2020-28337
  • sl1nki.page/advisories/CVE-2020-28337
  • sl1nki.page/blog/2021/02/01/microweber-zip-slip

Code Behaviors & Features

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Affected versions

All versions before 1.2.3

Fixed versions

  • 1.2.3

Solution

Upgrade to version 1.2.3 or above.

Impact 7.2 HIGH

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Learn more about CVSS

Weakness

  • CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
  • CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

Source file

packagist/microweber/microweber/CVE-2020-28337.yml

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