CVE-2016-9452: Drupal/core Denial of Service Vulnerability

MODERATE
Advisory Identifier: GHSA-jpj8-49hr-wcwv
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CVSS 6.5
CWE-20
Published
Advisory Summary

CVE-2016-9452 is a MODERATE (CVSS 6.5) denial of service vulnerability (CWE-20: Improper Input Validation) affecting Drupal/core libraries in the Packagist ecosystem. The issue involves drupal denial of service via transliterate mechanism. Remediation is available by upgrading affected packages to version 8.2.3.

CVE-2016-9452 at a Glance

CVE Identifier CVE-2016-9452
GHSA Identifier GHSA-jpj8-49hr-wcwv
Severity MODERATE
CVSS v3.1 Base Score 6.5
CWE Classification CWE-20: Improper Input Validation
Affected Product Drupal/core
Package Ecosystem Packagist
Published Date
Last Updated

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:N/UI:R/S:U/C:N/I:N/A:H).

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

How to Fix CVE-2016-9452

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

drupal/core fixed: 8.2.3 
Upgrade drupal/core to 8.2.3
drupal/drupal fixed: 8.2.3 
Upgrade drupal/drupal to 8.2.3
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 drupal/core

How to Check if You Are Affected

To determine whether your application is affected by CVE-2016-9452, inspect your project dependencies for Drupal/core:

inspect dependencies for drupal/core

Analyze the terminal output to locate any version of Drupal/core in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 8.2.3), 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-20: Improper Input Validation, where the product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. In Drupal/core, 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

The transliterate mechanism in Drupal 8.x before 8.2.3 allows remote attackers to cause a denial of service via a crafted URL.

CVE-2016-9452 Affected Drupal/core Versions

2 component(s)
Fixed Versions:
8.2.3
Product / Package Ecosystem Affected Versions Fixed Version
drupal/core
 Packagist
≥ 8.0
< 8.2.3
8.2.3
drupal/drupal
 Packagist
≥ 8.0
< 8.2.3
8.2.3

References

NVD — CVE-2016-9452 NVD
https://nvd.nist.gov/vuln/detail/CVE-2016-9452
Drupal/core Source Repository REPOSITORY
https://github.com/FriendsOfPHP/security-advisories/blob/master/drupal/core/CVE-2016-9452.yaml
Drupal/core Source Repository REPOSITORY
https://github.com/FriendsOfPHP/security-advisories/blob/master/drupal/drupal/CVE-2016-9452.yaml
Drupal/core Source Repository REPOSITORY
https://github.com/drupal/core
www.drupal.org/sa-core-2016-005 WEB
https://www.drupal.org/SA-CORE-2016-005
Drupal/core Security Information SECURITY
http://www.securityfocus.com/bid/94367

Frequently Asked Questions

What is CVE-2016-9452?
CVE-2016-9452 is a security vulnerability in Drupal/core involving Drupal Denial of service via transliterate mechanism under CWE-20: Improper Input Validation.
Which Drupal/core versions are affected?
Affected versions include releases prior to 8.2.3 across affected packages: drupal/core, drupal/drupal.
What version fixes CVE-2016-9452?
Upgrading to 8.2.3 (or the latest patched release for your respective branch) resolves the vulnerability.
Is drupal/core affected?
Yes, drupal/core is affected in releases prior to 8.2.3. Upgrade your dependency to 8.2.3 or later.
Is drupal/drupal affected?
Yes, drupal/drupal is affected in releases prior to 8.2.3. Upgrade your dependency to 8.2.3 or later.
What is the CVSS score of CVE-2016-9452?
CVE-2016-9452 has a CVSS v3.1 base score of 6.5 (MODERATE) with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2016-9452?
CVE-2016-9452 is classified under CWE-20: Improper Input Validation (The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.).
How can I check Packagist dependencies for CVE-2016-9452?
Run the dependency tree command: 'inspect dependencies for drupal/core'. 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-jpj8-49hr-wcwv",
  "modified" : "2024-04-23T17:17:43Z",
  "published" : "2022-05-17T03:38:38Z",
  "aliases" : [ "CVE-2016-9452" ],
  "summary" : "Drupal Denial of service via transliterate mechanism",
  "details" : "The transliterate mechanism in Drupal 8.x before 8.2.3 allows remote attackers to cause a denial of service via a crafted URL.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "drupal/core"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "8.0"
      }, {
        "fixed" : "8.2.3"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "drupal/drupal"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "8.0"
      }, {
        "fixed" : "8.2.3"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2016-9452"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/FriendsOfPHP/security-advisories/blob/master/drupal/core/CVE-2016-9452.yaml"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/FriendsOfPHP/security-advisories/blob/master/drupal/drupal/CVE-2016-9452.yaml"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/drupal/core"
  }, {
    "type" : "WEB",
    "url" : "https://www.drupal.org/SA-CORE-2016-005"
  }, {
    "type" : "WEB",
    "url" : "http://www.securityfocus.com/bid/94367"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-20" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2024-04-23T17:17:43Z",
    "nvd_published_at" : "2016-11-25T18:59:00Z"
  }
}