CVE-2017-16654: Symfony/intl Path Traversal Vulnerability

HIGH
Advisory Identifier: GHSA-c49r-8gj6-768r
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CVSS 7.5
CWE-22
Published
Advisory Summary

CVE-2017-16654 is a HIGH (CVSS 7.5) path traversal vulnerability (CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')) affecting Symfony/intl libraries in the Packagist ecosystem. The issue involves symfony directory traversal. Remediation is available by upgrading affected packages to version 2.7.38, 2.8.31, 3.2.14, 3.3.13.

CVE-2017-16654 at a Glance

CVE Identifier CVE-2017-16654
GHSA Identifier GHSA-c49r-8gj6-768r
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Affected Product Symfony/intl
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 7.5

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:N/S:U/C:H/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 High (C:H)
Integrity None (I:N)
Availability None (A:N)

How to Fix CVE-2017-16654

To remediate this vulnerability, upgrade all affected Symfony/intl 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/intl fixed: 2.7.38 
Upgrade symfony/intl to 2.7.38
symfony/intl fixed: 2.8.31 
Upgrade symfony/intl to 2.8.31
symfony/intl fixed: 3.2.14 
Upgrade symfony/intl to 3.2.14
symfony/intl fixed: 3.3.13 
Upgrade symfony/intl to 3.3.13
symfony/symfony fixed: 2.7.38 
Upgrade symfony/symfony to 2.7.38
symfony/symfony fixed: 2.8.31 
Upgrade symfony/symfony to 2.8.31
symfony/symfony fixed: 3.2.14 
Upgrade symfony/symfony to 3.2.14
symfony/symfony fixed: 3.3.13 
Upgrade symfony/symfony to 3.3.13
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/intl

How to Check if You Are Affected

To determine whether your application is affected by CVE-2017-16654, inspect your project dependencies for Symfony/intl:

inspect dependencies for symfony/intl

Analyze the terminal output to locate any version of Symfony/intl in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.7.38), 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 Symfony/intl, 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

An issue was discovered in Symfony before 2.7.38, 2.8.31, 3.2.14, 3.3.13, 3.4-BETA5, and 4.0-BETA5. The Intl component includes various bundle readers that are used to read resource bundles from the local filesystem. The read() methods of these classes use a path and a locale to determine the language bundle to retrieve. The locale argument value is commonly retrieved from untrusted user input (like a URL parameter). An attacker can use this argument to navigate to arbitrary directories via the dot-dot-slash attack, aka Directory Traversal.

CVE-2017-16654 Affected Symfony/intl Versions

8 component(s)
Fixed Versions:
2.7.382.8.313.2.143.3.13
Product / Package Ecosystem Affected Versions Fixed Version
symfony/intl
 Packagist
≥ 2.7.0
< 2.7.38
2.7.38
symfony/intl
 Packagist
≥ 2.8.0
< 2.8.31
2.8.31
symfony/intl
 Packagist
≥ 3.0.0
< 3.2.14
3.2.14
symfony/intl
 Packagist
≥ 3.3.0
< 3.3.13
3.3.13
symfony/symfony
 Packagist
≥ 2.7.0
< 2.7.38
2.7.38
symfony/symfony
 Packagist
≥ 2.8.0
< 2.8.31
2.8.31
symfony/symfony
 Packagist
≥ 3.0.0
< 3.2.14
3.2.14
symfony/symfony
 Packagist
≥ 3.3.0
< 3.3.13
3.3.13

References

NVD — CVE-2017-16654 NVD
https://nvd.nist.gov/vuln/detail/CVE-2017-16654
Symfony/intl Source Repository REPOSITORY
https://github.com/symfony/symfony/pull/24994
Symfony/intl Source Repository REPOSITORY
https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/intl/CVE-2017-16654.yaml
Symfony/intl Source Repository REPOSITORY
https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/symfony/CVE-2017-16654.yaml
Symfony/intl Source Repository REPOSITORY
https://github.com/symfony/symfony
lists.debian.org/debian-lts-announce... WEB
https://lists.debian.org/debian-lts-announce/2019/03/msg00009.html
symfony.com/blog/cve-2017-16654... WEB
https://symfony.com/blog/cve-2017-16654-intl-bundle-readers-breaking-out-of-paths
symfony.com/cve-2017-16654 WEB
https://symfony.com/cve-2017-16654
Symfony/intl Security Information SECURITY
https://www.debian.org/security/2018/dsa-4262

Frequently Asked Questions

What is CVE-2017-16654?
CVE-2017-16654 is a security vulnerability in Symfony/intl involving Symfony Directory Traversal under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal').
Which Symfony/intl versions are affected?
Affected versions include releases prior to 2.7.38, 2.8.31, 3.2.14, 3.3.13 across affected packages: symfony/intl, symfony/symfony.
What version fixes CVE-2017-16654?
Upgrading to 2.7.38, 2.8.31, 3.2.14, 3.3.13 (or the latest patched release for your respective branch) resolves the vulnerability.
Is symfony/intl affected?
Yes, symfony/intl is affected in releases prior to 2.7.38, 2.8.31, 3.2.14, 3.3.13. Upgrade your dependency to 2.7.38, 2.8.31, 3.2.14, 3.3.13 or later.
Is symfony/symfony affected?
Yes, symfony/symfony is affected in releases prior to 2.7.38, 2.8.31, 3.2.14, 3.3.13. Upgrade your dependency to 2.7.38, 2.8.31, 3.2.14, 3.3.13 or later.
What is the CVSS score of CVE-2017-16654?
CVE-2017-16654 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
What CWE is associated with CVE-2017-16654?
CVE-2017-16654 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 CVE-2017-16654?
Run the dependency tree command: 'inspect dependencies for symfony/intl'. 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 
{
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  "id" : "GHSA-c49r-8gj6-768r",
  "modified" : "2023-10-31T20:15:59Z",
  "published" : "2022-05-14T01:21:16Z",
  "aliases" : [ "CVE-2017-16654" ],
  "summary" : "Symfony Directory Traversal",
  "details" : "An issue was discovered in Symfony before 2.7.38, 2.8.31, 3.2.14, 3.3.13, 3.4-BETA5, and 4.0-BETA5. The Intl component includes various bundle readers that are used to read resource bundles from the local filesystem. The read() methods of these classes use a path and a locale to determine the language bundle to retrieve. The locale argument value is commonly retrieved from untrusted user input (like a URL parameter). An attacker can use this argument to navigate to arbitrary directories via the dot-dot-slash attack, aka Directory Traversal.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"
  } ],
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    "ranges" : [ {
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    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "symfony/symfony"
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    "ranges" : [ {
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      "events" : [ {
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      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2017-16654"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/symfony/symfony/pull/24994"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/intl/CVE-2017-16654.yaml"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/symfony/CVE-2017-16654.yaml"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/symfony/symfony"
  }, {
    "type" : "WEB",
    "url" : "https://lists.debian.org/debian-lts-announce/2019/03/msg00009.html"
  }, {
    "type" : "WEB",
    "url" : "https://symfony.com/blog/cve-2017-16654-intl-bundle-readers-breaking-out-of-paths"
  }, {
    "type" : "WEB",
    "url" : "https://symfony.com/cve-2017-16654"
  }, {
    "type" : "WEB",
    "url" : "https://www.debian.org/security/2018/dsa-4262"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-22" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-07-26T20:00:01Z",
    "nvd_published_at" : "2018-08-06T21:29:00Z"
  }
}