CVE-2012-6431: Symfony/http foundation Symfony Allows URI Restrictions Bypass Vulnerability

MODERATE
Advisory Identifier: GHSA-83c3-qx27-2rwr
Share
CWE-287
Published
Advisory Summary

CVE-2012-6431 is a MODERATE symfony allows uri restrictions bypass vulnerability (CWE-287: Improper Authentication) affecting Symfony/http foundation libraries in the Packagist ecosystem. The issue involves symfony allows uri restrictions bypass via double-encoded string. Remediation is available by upgrading affected packages to version 2.0.19.

CVE-2012-6431 at a Glance

CVE Identifier CVE-2012-6431
GHSA Identifier GHSA-83c3-qx27-2rwr
Severity MODERATE
CVSS v3.1 Base Score N/A
CWE Classification CWE-287: Improper Authentication
Affected Product Symfony/http foundation
Package Ecosystem Packagist
Published Date
Last Updated

How to Fix CVE-2012-6431

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

symfony/http-foundation fixed: 2.0.19 
Upgrade symfony/http-foundation to 2.0.19
symfony/routing fixed: 2.0.19 
Upgrade symfony/routing to 2.0.19
symfony/security fixed: 2.0.19 
Upgrade symfony/security to 2.0.19
symfony/symfony fixed: 2.0.19 
Upgrade symfony/symfony to 2.0.19
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 symfony/http-foundation

How to Check if You Are Affected

To determine whether your application is affected by CVE-2012-6431, inspect your project dependencies for Symfony/http foundation:

inspect dependencies for symfony/http-foundation

Analyze the terminal output to locate any version of Symfony/http foundation in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.0.19), 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-287: Improper Authentication, where when an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. In Symfony/http foundation, 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

On the Symfony 2.0.x version, there's a security issue that allows access to routes protected by a firewall even when the user is not logged in. Both the Routing component and the Security component uses the path returned by `getPathInfo()` to match a Request. The `getPathInfo()` returns a decoded path, but the Routing component (`Symfony\Component\Routing\Matcher\UrlMatcher`) decodes the path a second time; whereas the Security component, `Symfony\Component\HttpFoundation\RequestMatcher`, does not. This difference causes Symfony 2.0 to be vulnerable to double encoding attacks.

CVE-2012-6431 Affected Symfony/http foundation Versions

4 component(s)
Fixed Versions:
2.0.19
Product / Package Ecosystem Affected Versions Fixed Version
symfony/http-foundation
 Packagist
≥ 2.0.0
< 2.0.19
2.0.19
symfony/routing
 Packagist
≥ 2.0.0
< 2.0.19
2.0.19
symfony/security
 Packagist
≥ 2.0.0
< 2.0.19
2.0.19
symfony/symfony
 Packagist
≥ 2.0.0
< 2.0.19
2.0.19

References

NVD — CVE-2012-6431 NVD
https://nvd.nist.gov/vuln/detail/CVE-2012-6431
Security Fix Commit FIX COMMIT
https://github.com/symfony/symfony/commit/55014a6841bec50046e8329a4835c160ac31a496
Security Fix Commit FIX COMMIT
https://github.com/symfony/symfony/commit/8b2c17f80377582287a78e0b521497e039dd6b0d
Symfony/http foundation Source Repository REPOSITORY
https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/http-foundation/CVE-2012-6431.yaml
Symfony/http foundation Source Repository REPOSITORY
https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/routing/CVE-2012-6431.yaml
Symfony/http foundation Source Repository REPOSITORY
https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/security/CVE-2012-6431.yaml
Symfony/http foundation Source Repository REPOSITORY
https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/symfony/CVE-2012-6431.yaml
Symfony/http foundation Release RELEASE
https://symfony.com/blog/security-release-symfony-2-0-20-and-2-1-5-released
Symfony/http foundation Release RELEASE
http://symfony.com/blog/security-release-symfony-2-0-20-and-2-1-5-released

Frequently Asked Questions

What is CVE-2012-6431?
CVE-2012-6431 is a security vulnerability in Symfony/http foundation involving Symfony Allows URI Restrictions Bypass Via Double-Encoded String under CWE-287: Improper Authentication.
Which Symfony/http foundation versions are affected?
Affected versions include releases prior to 2.0.19 across affected packages: symfony/http-foundation, symfony/routing, symfony/security, symfony/symfony.
What version fixes CVE-2012-6431?
Upgrading to 2.0.19 (or the latest patched release for your respective branch) resolves the vulnerability.
Is symfony/http-foundation affected?
Yes, symfony/http-foundation is affected in releases prior to 2.0.19. Upgrade your dependency to 2.0.19 or later.
Is symfony/routing affected?
Yes, symfony/routing is affected in releases prior to 2.0.19. Upgrade your dependency to 2.0.19 or later.
What CWE is associated with CVE-2012-6431?
CVE-2012-6431 is classified under CWE-287: Improper Authentication (When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.).
How can I check Packagist dependencies for CVE-2012-6431?
Run the dependency tree command: 'inspect dependencies for symfony/http-foundation'. 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-83c3-qx27-2rwr",
  "modified" : "2023-09-21T23:06:08Z",
  "published" : "2022-05-17T05:17:03Z",
  "aliases" : [ "CVE-2012-6431" ],
  "summary" : "Symfony Allows URI Restrictions Bypass Via Double-Encoded String",
  "details" : "On the Symfony 2.0.x version, there's a security issue that allows access to routes protected by a firewall even when the user is not logged in.\n\nBoth the Routing component and the Security component uses the path returned by `getPathInfo()` to match a Request. The `getPathInfo()` returns a decoded path, but the Routing component (`Symfony\\Component\\Routing\\Matcher\\UrlMatcher`) decodes the path a second time; whereas the Security component, `Symfony\\Component\\HttpFoundation\\RequestMatcher`, does not.\n\nThis difference causes Symfony 2.0 to be vulnerable to double encoding attacks.\n\n",
  "severity" : [ ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "symfony/http-foundation"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.0.0"
      }, {
        "fixed" : "2.0.19"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "symfony/routing"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.0.0"
      }, {
        "fixed" : "2.0.19"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "symfony/security"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.0.0"
      }, {
        "fixed" : "2.0.19"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "symfony/symfony"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.0.0"
      }, {
        "fixed" : "2.0.19"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2012-6431"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/symfony/symfony/commit/55014a6841bec50046e8329a4835c160ac31a496"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/symfony/symfony/commit/8b2c17f80377582287a78e0b521497e039dd6b0d"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/http-foundation/CVE-2012-6431.yaml"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/routing/CVE-2012-6431.yaml"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/security/CVE-2012-6431.yaml"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/symfony/CVE-2012-6431.yaml"
  }, {
    "type" : "WEB",
    "url" : "https://symfony.com/blog/security-release-symfony-2-0-20-and-2-1-5-released"
  }, {
    "type" : "WEB",
    "url" : "http://symfony.com/blog/security-release-symfony-2-0-20-and-2-1-5-released"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-287" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-08-15T23:43:25Z",
    "nvd_published_at" : "2012-12-27T11:47:00Z"
  }
}