CVE-2018-19609: Showdoc/showdoc Remote Code Execution Vulnerability

MODERATE

Advisory Identifier: GHSA-6xx7-cphv-pxgr

CVSS 6.5

Published 2022-05-14

Advisory Summary

CVE-2018-19609 is a MODERATE (CVSS 6.5) remote code execution vulnerability (CWE-200: Exposure of Sensitive Information to an Unauthorized Actor) affecting Showdoc/showdoc libraries in the Packagist ecosystem. The issue involves showdoc forced browsing. Remediation is available in the latest vendor maintenance releases.

CVE-2018-19609 at a Glance

CVE Identifier CVE-2018-19609

GHSA Identifier GHSA-6xx7-cphv-pxgr

Severity MODERATE

CVSS v3.1 Base Score 6.5

CWE Classification CWE-200: Exposure of Sensitive Information to an Unauthorized Actor

Affected Product Showdoc/showdoc

Package Ecosystem Packagist

Published Date 2022-05-14

Last Updated 2023-10-06

Security Impact

CVSS: 6.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N).

Attack Vector Network (AV:N)

Attack Complexity Low (AC:L)

Privileges Required Low (PR:L)

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-2018-19609

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-2018-19609, 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-200: Exposure of Sensitive Information to an Unauthorized Actor, where the product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. 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 2.4.1 allows remote attackers to obtain sensitive information by navigating with a modified page_id, as demonstrated by reading note content, or discovering a username in the JSON data at a diff URL.

CVE-2018-19609 Affected Showdoc/showdoc Versions

1 component(s)

Product / Package	Ecosystem	Affected Versions	Fixed Version
showdoc/showdoc	Packagist	≤ 2.4.1

References

NVD — CVE-2018-19609 NVD

https://nvd.nist.gov/vuln/detail/CVE-2018-19609

Showdoc/showdoc Source Repository REPOSITORY

https://github.com/CCCCCrash/POCs/tree/master/Web/showdoc/IncorrectAccessControl

Showdoc/showdoc Source Repository REPOSITORY

https://github.com/star7th/showdoc

Frequently Asked Questions

What is CVE-2018-19609?

CVE-2018-19609 is a security vulnerability in Showdoc/showdoc involving Showdoc Forced Browsing under CWE-200: Exposure of Sensitive Information to an Unauthorized Actor.

Which Showdoc/showdoc versions are affected?

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

What version fixes CVE-2018-19609?

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-2018-19609?

CVE-2018-19609 has a CVSS v3.1 base score of 6.5 (MODERATE) with vector string CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

What CWE is associated with CVE-2018-19609?

CVE-2018-19609 is classified under CWE-200: Exposure of Sensitive Information to an Unauthorized Actor (The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.).

How can I check Packagist dependencies for CVE-2018-19609?

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-6xx7-cphv-pxgr",
  "modified" : "2023-10-06T18:01:16Z",
  "published" : "2022-05-14T01:45:51Z",
  "aliases" : [ "CVE-2018-19609" ],
  "summary" : "Showdoc Forced Browsing",
  "details" : "ShowDoc 2.4.1 allows remote attackers to obtain sensitive information by navigating with a modified page_id, as demonstrated by reading note content, or discovering a username in the JSON data at a diff URL.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "showdoc/showdoc"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "2.4.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2018-19609"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/CCCCCrash/POCs/tree/master/Web/showdoc/IncorrectAccessControl"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/star7th/showdoc"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-200" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-07-25T18:24:01Z",
    "nvd_published_at" : "2018-11-27T16:29:00Z"
  }
}

CVSS V3

6.5 MODERATE