CVE-2021-3680: Showdoc/showdoc Inadequate Encryption Strength Vulnerability

MODERATE

Advisory Identifier: GHSA-8vh3-29mr-m9xg

CVSS 4.9

Published 2021-09-01

Advisory Summary

CVE-2021-3680 is a MODERATE (CVSS 4.9) inadequate encryption strength vulnerability (CWE-326: Inadequate Encryption Strength) affecting Showdoc/showdoc libraries in the Packagist ecosystem. The issue involves inadequate encryption strength in showdoc. Remediation is available in the latest vendor maintenance releases.

CVE-2021-3680 at a Glance

CVE Identifier CVE-2021-3680

GHSA Identifier GHSA-8vh3-29mr-m9xg

Severity MODERATE

CVSS v3.1 Base Score 4.9

CWE Classification CWE-326: Inadequate Encryption Strength

Affected Product Showdoc/showdoc

Package Ecosystem Packagist

Published Date 2021-09-01

Last Updated 2021-08-30

Security Impact

CVSS: 4.9

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

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 None (C:N)

Integrity High (I:H)

Availability None (A:N)

How to Fix CVE-2021-3680

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

showdoc/showdoc fixed: Latest secure release

Upgrade showdoc/showdoc to 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:

inspect dependencies for showdoc/showdoc

How to Check if You Are Affected

To determine whether your application is affected by CVE-2021-3680, inspect your project dependencies for Showdoc/showdoc:

inspect dependencies for showdoc/showdoc

Analyze the terminal output to locate any version of Showdoc/showdoc 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: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-326: Inadequate Encryption Strength, where the product stores or transmits sensitive data using an encryption scheme that is theoretically sound, but is not strong enough for the level of protection required. In Showdoc/showdoc, 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

showdoc makes use of a hardcoded salt in its user password hash function

CVE-2021-3680 Affected Showdoc/showdoc Versions

1 component(s)

Product / Package	Ecosystem	Affected Versions	Fixed Version
showdoc/showdoc	Packagist	≤ 2.9.8

References

NVD — CVE-2021-3680 NVD

https://nvd.nist.gov/vuln/detail/CVE-2021-3680

Security Fix Commit FIX COMMIT

https://github.com/star7th/showdoc/commit/4b962c1740311e0d46775023b6acba39ad60e370

Showdoc/showdoc Source Repository REPOSITORY

https://github.com/star7th/showdoc

Showdoc/showdoc Source Repository REPOSITORY

https://github.com/star7th/showdoc/blob/fd1740234a12804b45af9cac3563567d83ba414d/server/Application/Home/Model/UserModel.class.php#L20

huntr.dev/bounties/76b49607-f... WEB

https://huntr.dev/bounties/76b49607-fba9-4100-9be7-cb459fe6cfe2

Frequently Asked Questions

What is CVE-2021-3680?

CVE-2021-3680 is a security vulnerability in Showdoc/showdoc involving Inadequate Encryption Strength in showdoc under CWE-326: Inadequate Encryption Strength.

Which Showdoc/showdoc versions are affected?

Affected versions include releases prior to current release patches across affected packages: showdoc/showdoc.

What version fixes CVE-2021-3680?

Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.

Is showdoc/showdoc affected?

Yes, showdoc/showdoc 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-2021-3680?

CVE-2021-3680 has a CVSS v3.1 base score of 4.9 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N.

What CWE is associated with CVE-2021-3680?

CVE-2021-3680 is classified under CWE-326: Inadequate Encryption Strength (The product stores or transmits sensitive data using an encryption scheme that is theoretically sound, but is not strong enough for the level of protection required.).

How can I check Packagist dependencies for CVE-2021-3680?

Run the dependency tree command: 'inspect dependencies for showdoc/showdoc'. 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-8vh3-29mr-m9xg",
  "modified" : "2021-08-30T21:53:31Z",
  "published" : "2021-09-01T18:31:23Z",
  "aliases" : [ "CVE-2021-3680" ],
  "summary" : "Inadequate Encryption Strength in showdoc",
  "details" : "showdoc makes use of a hardcoded salt in its user password hash function\n\n",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "showdoc/showdoc"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "2.9.8"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-3680"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/star7th/showdoc/commit/4b962c1740311e0d46775023b6acba39ad60e370"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/star7th/showdoc"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/star7th/showdoc/blob/fd1740234a12804b45af9cac3563567d83ba414d/server/Application/Home/Model/UserModel.class.php#L20"
  }, {
    "type" : "WEB",
    "url" : "https://huntr.dev/bounties/76b49607-fba9-4100-9be7-cb459fe6cfe2"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-326", "CWE-347" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2021-08-30T21:53:31Z",
    "nvd_published_at" : "2021-08-04T13:15:00Z"
  }
}

CVSS V3

4.9 MODERATE