GHSA-7cvr-xhm5-x998: Twig/twig Path Traversal Vulnerability

MODERATE
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CVSS 5.3
CWE-22
Published
Advisory Summary

GHSA-7cvr-xhm5-x998 is a MODERATE (CVSS 5.3) path traversal vulnerability (CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')) affecting Twig/twig libraries in the Packagist ecosystem. The issue involves twig path traversal vulnerability in the filesystem loader. Remediation is available by upgrading affected packages to version 1.12.3.

GHSA-7cvr-xhm5-x998 at a Glance

CVE Identifier N/A
GHSA Identifier GHSA-7cvr-xhm5-x998
Severity MODERATE
CVSS v3.1 Base Score 5.3
CWE Classification CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Affected Product Twig/twig
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 5.3

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

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

How to Fix GHSA-7cvr-xhm5-x998

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

twig/twig fixed: 1.12.3 
Upgrade twig/twig to 1.12.3
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 twig/twig

How to Check if You Are Affected

To determine whether your application is affected by GHSA-7cvr-xhm5-x998, inspect your project dependencies for Twig/twig:

inspect dependencies for twig/twig

Analyze the terminal output to locate any version of Twig/twig in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.12.3), 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-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 Twig/twig, 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

Twig is affected by path traversal vulnerability when used with Twig_Loader_Filesystem for loading Twig templates but only if the application is using non-trusted template names (names provided by a end-user for instance). When affected, it is possible to go up one directory for the paths configured in the application's loader. For instance, if the filesystem loader is configured with /path/to/templates as a path to look for templates, an attacker can force Twig to include a file stored in /path/to by prepending the path with /../ like in {% include "/../somefile_in_path_to" %} Note that using anything else (like ../somefile, /../../somefile, or ../../somefile) won’t work and the application will return a proper exception.

GHSA-7cvr-xhm5-x998 Affected Twig/twig Versions

1 component(s)
Fixed Versions:
1.12.3
Product / Package Ecosystem Affected Versions Fixed Version
twig/twig
 Packagist
≥ 1.0.0
< 1.12.3
1.12.3

References

Security Fix Commit FIX COMMIT
https://github.com/fabpot/Twig/commit/3d19a2eed53570776af313593aaeb5ad62cf4980.diff
Twig/twig Source Repository REPOSITORY
https://github.com/FriendsOfPHP/security-advisories/blob/master/twig/twig/2013-04-08.yaml
Twig/twig Source Repository REPOSITORY
https://github.com/twigphp/Twig
Twig/twig Release RELEASE
https://web.archive.org/web/20130511111630/http://blog.twig.sensiolabs.org/post/47461911874/security-release-twig-1-12-3-released

Frequently Asked Questions

What is GHSA-7cvr-xhm5-x998?
GHSA-7cvr-xhm5-x998 is a security vulnerability in Twig/twig involving Twig Path Traversal vulnerability in the filesystem loader under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal').
Which Twig/twig versions are affected?
Affected versions include releases prior to 1.12.3 across affected packages: twig/twig.
What version fixes GHSA-7cvr-xhm5-x998?
Upgrading to 1.12.3 (or the latest patched release for your respective branch) resolves the vulnerability.
Is twig/twig affected?
Yes, twig/twig is affected in releases prior to 1.12.3. Upgrade your dependency to 1.12.3 or later.
What is the CVSS score of GHSA-7cvr-xhm5-x998?
GHSA-7cvr-xhm5-x998 has a CVSS v3.1 base score of 5.3 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.
What CWE is associated with GHSA-7cvr-xhm5-x998?
GHSA-7cvr-xhm5-x998 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 Packagist dependencies for GHSA-7cvr-xhm5-x998?
Run the dependency tree command: 'inspect dependencies for twig/twig'. 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-7cvr-xhm5-x998",
  "modified" : "2024-05-30T13:42:49Z",
  "published" : "2024-05-30T13:42:49Z",
  "aliases" : [ ],
  "summary" : "Twig Path Traversal vulnerability in the filesystem loader",
  "details" : "Twig is affected by path traversal vulnerability when used with Twig_Loader_Filesystem for loading Twig templates but only if the application is using non-trusted template names (names provided by a end-user for instance).\n\nWhen affected, it is possible to go up one directory for the paths configured in the application's loader.\n\nFor instance, if the filesystem loader is configured with /path/to/templates as a path to look for templates, an attacker can force Twig to include a file stored in /path/to by prepending the path with /../ like in {% include \"/../somefile_in_path_to\" %}\n\nNote that using anything else (like ../somefile, /../../somefile, or ../../somefile) won’t work and the application will return a proper exception.\n",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "twig/twig"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "1.0.0"
      }, {
        "fixed" : "1.12.3"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/fabpot/Twig/commit/3d19a2eed53570776af313593aaeb5ad62cf4980.diff"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/FriendsOfPHP/security-advisories/blob/master/twig/twig/2013-04-08.yaml"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/twigphp/Twig"
  }, {
    "type" : "WEB",
    "url" : "https://web.archive.org/web/20130511111630/http://blog.twig.sensiolabs.org/post/47461911874/security-release-twig-1-12-3-released"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-22" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2024-05-30T13:42:49Z",
    "nvd_published_at" : null
  }
}