CVE-2020-28337: Microweber/microweber Zip Slip Vulnerability

HIGH
Advisory Identifier: GHSA-pqcf-v8v5-jmcg
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CVSS 7.2
CWE-22
Published
Advisory Summary

CVE-2020-28337 is a HIGH (CVSS 7.2) zip slip vulnerability (CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')) affecting Microweber/microweber libraries in the Packagist ecosystem. The issue involves zip slip in microweber. Remediation is available by upgrading affected packages to version 1.2.3.

CVE-2020-28337 at a Glance

CVE Identifier CVE-2020-28337
GHSA Identifier GHSA-pqcf-v8v5-jmcg
Severity HIGH
CVSS v3.1 Base Score 7.2
CWE Classification CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Affected Product Microweber/microweber
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 7.2

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

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

How to Fix CVE-2020-28337

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

microweber/microweber fixed: 1.2.3 
Upgrade microweber/microweber to 1.2.3
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for microweber/microweber

How to Check if You Are Affected

To determine whether your application is affected by CVE-2020-28337, inspect your project dependencies for Microweber/microweber:

inspect dependencies for microweber/microweber

Analyze the terminal output to locate any version of Microweber/microweber in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.2.3), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

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 Microweber/microweber, 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

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.

CVE-2020-28337 Affected Microweber/microweber Versions

1 component(s)
Fixed Versions:
1.2.3
Product / Package Ecosystem Affected Versions Fixed Version
microweber/microweber
 Packagist
< 1.2.3
1.2.3

References

NVD — CVE-2020-28337 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-28337
Security Fix Commit FIX COMMIT
https://github.com/microweber/microweber/commit/777ee9c3e7519eb3672c79ac41066175b2001b50
sl1nki.page/advisories/cve-2020... WEB
https://sl1nki.page/advisories/CVE-2020-28337
sl1nki.page/blog/2021/02/01/mic... WEB
https://sl1nki.page/blog/2021/02/01/microweber-zip-slip
Microweber/microweber Security Information SECURITY
http://packetstormsecurity.com/files/162514/Microweber-CMS-1.1.20-Remote-Code-Execution.html

Frequently Asked Questions

What is CVE-2020-28337?
CVE-2020-28337 is a security vulnerability in Microweber/microweber involving Zip slip in Microweber under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal').
Which Microweber/microweber versions are affected?
Affected versions include releases prior to 1.2.3 across affected packages: microweber/microweber.
What version fixes CVE-2020-28337?
Upgrading to 1.2.3 (or the latest patched release for your respective branch) resolves the vulnerability.
Is microweber/microweber affected?
Yes, microweber/microweber is affected in releases prior to 1.2.3. Upgrade your dependency to 1.2.3 or later.
What is the CVSS score of CVE-2020-28337?
CVE-2020-28337 has a CVSS v3.1 base score of 7.2 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2020-28337?
CVE-2020-28337 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 Packagist dependencies for CVE-2020-28337?
Run the dependency tree command: 'inspect dependencies for microweber/microweber'. 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-pqcf-v8v5-jmcg",
  "modified" : "2021-05-07T21:58:37Z",
  "published" : "2022-02-10T22:23:18Z",
  "aliases" : [ "CVE-2020-28337" ],
  "summary" : "Zip slip in Microweber",
  "details" : "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.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "microweber/microweber"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.2.3"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-28337"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/microweber/microweber/commit/777ee9c3e7519eb3672c79ac41066175b2001b50"
  }, {
    "type" : "WEB",
    "url" : "https://sl1nki.page/advisories/CVE-2020-28337"
  }, {
    "type" : "WEB",
    "url" : "https://sl1nki.page/blog/2021/02/01/microweber-zip-slip"
  }, {
    "type" : "WEB",
    "url" : "http://packetstormsecurity.com/files/162514/Microweber-CMS-1.1.20-Remote-Code-Execution.html"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-22" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2021-05-07T21:58:37Z",
    "nvd_published_at" : "2021-02-15T20:15:00Z"
  }
}