CVE-2015-7809: Twig/twig Remote Code Execution Vulnerability

HIGH
Advisory Identifier: GHSA-xw83-pwrm-9j74
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CVSS 8.1
CWE-74
Published
Advisory Summary

CVE-2015-7809 is a HIGH (CVSS 8.1) remote code execution vulnerability (CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')) affecting Twig/twig libraries in the Packagist ecosystem. The issue involves twig remote code execution in templates. Remediation is available by upgrading affected packages to version 1.20.0.

CVE-2015-7809 at a Glance

CVE Identifier CVE-2015-7809
GHSA Identifier GHSA-xw83-pwrm-9j74
Severity HIGH
CVSS v3.1 Base Score 8.1
CWE Classification CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
Affected Product Twig/twig
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 8.1

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

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

How to Fix CVE-2015-7809

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: 1.20.0 
Upgrade twig/twig to 1.20.0
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 CVE-2015-7809, 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 1.20.0), 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-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection'), where the product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component. 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

The `displayBlock` function `Template.php` in Sensio Labs Twig before 1.20.0, when Sandbox mode is enabled, allows remote attackers to execute arbitrary code via the `_self` variable in a template.

CVE-2015-7809 Affected Twig/twig Versions

1 component(s)
Fixed Versions:
1.20.0
Product / Package Ecosystem Affected Versions Fixed Version
twig/twig
 Packagist
< 1.20.0
1.20.0

References

NVD — CVE-2015-7809 NVD
https://nvd.nist.gov/vuln/detail/CVE-2015-7809
Twig/twig Source Repository REPOSITORY
https://github.com/twigphp/Twig/pull/1759
Security Fix Commit FIX COMMIT
https://github.com/twigphp/Twig/commit/30be07759a3de2558da5224f127d052ecf492e8f
Twig/twig Source Repository REPOSITORY
https://github.com/FriendsOfPHP/security-advisories/blob/master/twig/twig/CVE-2015-7809.yaml
Twig/twig Source Repository REPOSITORY
https://github.com/twigphp/Twig
Twig/twig Release RELEASE
https://symfony.com/blog/security-release-twig-1-20-0
Twig/twig Security Information SECURITY
http://openwall.com/lists/oss-security/2015/08/21/3
Twig/twig Security Information SECURITY
http://openwall.com/lists/oss-security/2015/10/11/2
Twig/twig Release RELEASE
http://symfony.com/blog/security-release-twig-1-20-0
Twig/twig Security Information SECURITY
http://www.debian.org/security/2015/dsa-3343

Frequently Asked Questions

What is CVE-2015-7809?
CVE-2015-7809 is a security vulnerability in Twig/twig involving Twig remote code execution in templates under CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection').
Which Twig/twig versions are affected?
Affected versions include releases prior to 1.20.0 across affected packages: twig/twig.
What version fixes CVE-2015-7809?
Upgrading to 1.20.0 (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 1.20.0. Upgrade your dependency to 1.20.0 or later.
What is the CVSS score of CVE-2015-7809?
CVE-2015-7809 has a CVSS v3.1 base score of 8.1 (HIGH) with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2015-7809?
CVE-2015-7809 is classified under CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') (The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component.).
How can I check Packagist dependencies for CVE-2015-7809?
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-xw83-pwrm-9j74",
  "modified" : "2024-05-30T12:39:43Z",
  "published" : "2022-05-14T02:03:50Z",
  "aliases" : [ "CVE-2015-7809" ],
  "summary" : "Twig remote code execution in templates",
  "details" : "The `displayBlock` function `Template.php` in Sensio Labs Twig before 1.20.0, when Sandbox mode is enabled, allows remote attackers to execute arbitrary code via the `_self` variable in a template.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "twig/twig"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.20.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2015-7809"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/twigphp/Twig/pull/1759"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/twigphp/Twig/commit/30be07759a3de2558da5224f127d052ecf492e8f"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/FriendsOfPHP/security-advisories/blob/master/twig/twig/CVE-2015-7809.yaml"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/twigphp/Twig"
  }, {
    "type" : "WEB",
    "url" : "https://symfony.com/blog/security-release-twig-1-20-0"
  }, {
    "type" : "WEB",
    "url" : "http://openwall.com/lists/oss-security/2015/08/21/3"
  }, {
    "type" : "WEB",
    "url" : "http://openwall.com/lists/oss-security/2015/10/11/2"
  }, {
    "type" : "WEB",
    "url" : "http://symfony.com/blog/security-release-twig-1-20-0"
  }, {
    "type" : "WEB",
    "url" : "http://www.debian.org/security/2015/dsa-3343"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-74" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2024-05-30T12:39:43Z",
    "nvd_published_at" : "2015-11-06T21:59:00Z"
  }
}