CVE-2021-46062: Ms basic MCMS Arbitrary File Deletion Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-rpvr-mw7r-25xx
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CVSS 7.1
CWE-22
Published
Advisory Summary

CVE-2021-46062 is a HIGH (CVSS 7.1) mcms arbitrary file deletion vulnerability vulnerability (CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')) affecting Ms basic libraries in the Maven ecosystem. The issue involves mcms arbitrary file deletion vulnerability. Remediation is available by upgrading affected packages to version 2.1.16, 5.2.11.

CVE-2021-46062 at a Glance

CVE Identifier CVE-2021-46062
GHSA Identifier GHSA-rpvr-mw7r-25xx
Severity HIGH
CVSS v3.1 Base Score 7.1
CWE Classification CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Affected Product Ms basic
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 7.1

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

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

How to Fix CVE-2021-46062

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

net.mingsoft:ms-basic fixed: 2.1.16 
<dependency>
    <groupId>net.mingsoft</groupId>
    <artifactId>ms-basic</artifactId>
    <version>2.1.16</version>
</dependency>
net.mingsoft:ms-mcms fixed: 5.2.11 
<dependency>
    <groupId>net.mingsoft</groupId>
    <artifactId>ms-mcms</artifactId>
    <version>5.2.11</version>
</dependency>
Verify Direct and Transitive Dependencies

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

mvn dependency:tree -Dincludes=net.mingsoft

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2021-46062, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree -Dincludes=net.mingsoft

Analyze the terminal output to locate any version of Ms basic in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.1.16), your application is affected.

Note: The mvn dependency:tree -Dincludes=net.mingsoft command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.

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 Ms basic, 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

`net.mingsoft:ms-basic` is used for plugin management for applications built with Maven for the [Mingfei Content Management System (MCMS)](https://gitee.com/mingSoft/MCMS). ms-basic before 2.1.16 is vulnerable to arbitrary file deletion using POST requests to `/template/writeFileContent` via the `oldFileName` parameter. MCMS before 5.2.11 is also vulnerable since it bundles vulnerable versions of ms-basic.

CVE-2021-46062 Affected Ms basic Versions

2 component(s)
Fixed Versions:
2.1.165.2.11
Product / Package Ecosystem Affected Versions Fixed Version
net.mingsoft:ms-basic
maven/net.mingsoft/ms-basic
Maven
< 2.1.16
2.1.16
net.mingsoft:ms-mcms
maven/net.mingsoft/ms-mcms
Maven
< 5.2.11
5.2.11

References

NVD — CVE-2021-46062 NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-46062
Ms basic Source Repository REPOSITORY
https://github.com/ming-soft/MCMS/issues/59

Frequently Asked Questions

What is CVE-2021-46062?
CVE-2021-46062 is a security vulnerability in Ms basic involving MCMS Arbitrary File Deletion vulnerability under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal').
Which Ms basic versions are affected?
Affected versions include releases prior to 2.1.16, 5.2.11 across affected packages: net.mingsoft:ms-basic, net.mingsoft:ms-mcms.
What version fixes CVE-2021-46062?
Upgrading to 2.1.16, 5.2.11 (or the latest patched release for your respective branch) resolves the vulnerability.
Is ms-basic affected?
Yes, net.mingsoft:ms-basic is affected in releases prior to 2.1.16. Upgrade your dependency to 2.1.16 or later.
Is ms-mcms affected?
Yes, net.mingsoft:ms-mcms is affected in releases prior to 5.2.11. Upgrade your dependency to 5.2.11 or later.
What is the CVSS score of CVE-2021-46062?
CVE-2021-46062 has a CVSS v3.1 base score of 7.1 (HIGH) with vector string CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H.
What CWE is associated with CVE-2021-46062?
CVE-2021-46062 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 Maven dependencies for CVE-2021-46062?
Run the dependency tree command: 'mvn dependency:tree -Dincludes=net.mingsoft'. 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-rpvr-mw7r-25xx",
  "modified" : "2023-09-25T15:44:07Z",
  "published" : "2022-02-19T00:01:24Z",
  "aliases" : [ "CVE-2021-46062" ],
  "summary" : "MCMS Arbitrary File Deletion vulnerability",
  "details" : "`net.mingsoft:ms-basic` is used for plugin management for applications built with Maven for the [Mingfei Content Management System (MCMS)](https://gitee.com/mingSoft/MCMS). ms-basic before 2.1.16 is vulnerable to arbitrary file deletion using POST requests to `/template/writeFileContent` via the `oldFileName` parameter. MCMS before 5.2.11 is also vulnerable since it bundles vulnerable versions of ms-basic.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "net.mingsoft:ms-basic"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "2.1.16"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "net.mingsoft:ms-mcms"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "5.2.11"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-46062"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/ming-soft/MCMS/issues/59"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-22" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-03-01T20:58:14Z",
    "nvd_published_at" : "2022-02-18T20:15:00Z"
  }
}