GHSA-2r3v-q9x3-7g46: Simplesamlphp/simplesamlphp Link Injection Vulnerability

LOW
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CVSS 3.7
CWE-74
Published
Advisory Summary

GHSA-2r3v-q9x3-7g46 is a LOW (CVSS 3.7) link injection vulnerability (CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')) affecting Simplesamlphp/simplesamlphp libraries in the Packagist ecosystem. The issue involves link injection in simplesamlphp. Remediation is available by upgrading affected packages to version 1.14.4.

GHSA-2r3v-q9x3-7g46 at a Glance

CVE Identifier N/A
GHSA Identifier GHSA-2r3v-q9x3-7g46
Severity LOW
CVSS v3.1 Base Score 3.7
CWE Classification CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
Affected Product Simplesamlphp/simplesamlphp
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 3.7

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:N/I:L/A:N).

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 None (C:N)
Integrity Low (I:L)
Availability None (A:N)

How to Fix GHSA-2r3v-q9x3-7g46

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

simplesamlphp/simplesamlphp fixed: 1.14.4 
Upgrade simplesamlphp/simplesamlphp to 1.14.4
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 simplesamlphp/simplesamlphp

How to Check if You Are Affected

To determine whether your application is affected by GHSA-2r3v-q9x3-7g46, inspect your project dependencies for Simplesamlphp/simplesamlphp:

inspect dependencies for simplesamlphp/simplesamlphp

Analyze the terminal output to locate any version of Simplesamlphp/simplesamlphp in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.14.4), 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 Simplesamlphp/simplesamlphp, 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

### Background Several scripts part of SimpleSAMLphp display a web page with links obtained from the request parameters. This allows us to enhance usability, as the users are presented with links they can follow after completing a certain action, like logging out. ### Description The following scripts were not checking the URLs obtained via the HTTP request before displaying them as the target of links that the user may click on: - `www/logout.php` - `modules/core/www/no_cookie.php` The issue allowed attackers to display links targeting a malicious website inside a trusted site running SimpleSAMLphp, due to the lack of security checks involving the `link_href` and `retryURL` HTTP parameters, respectively. The issue was resolved by including a verification of the URLs received in the request against a white list of websites specified in the `trusted.url.domains` configuration option. ### Affected versions All SimpleSAMLphp versions prior to 1.14.4. ### Impact A remote attacker could craft a link pointing to a trusted website running SimpleSAMLphp, including a parameter pointing to a malicious website, and try to fool the victim into visiting that website by clicking on a link in the page presented by SimpleSAMLphp. ### Resolution Upgrade to the latest version. ### Credit This security issue was discovered and reported by John Page (hyp3rlinx).

GHSA-2r3v-q9x3-7g46 Affected Simplesamlphp/simplesamlphp Versions

1 component(s)
Fixed Versions:
1.14.4
Product / Package Ecosystem Affected Versions Fixed Version
simplesamlphp/simplesamlphp
 Packagist
< 1.14.4
1.14.4

References

GitHub Advisory / Wiki ADVISORY
https://github.com/simplesamlphp/simplesamlphp/security/advisories/GHSA-2r3v-q9x3-7g46
snyk.io/vuln/snyk-php-simpl... WEB
https://snyk.io/vuln/SNYK-PHP-SIMPLESAMLPHPSIMPLESAMLPHP-70160

Frequently Asked Questions

What is GHSA-2r3v-q9x3-7g46?
GHSA-2r3v-q9x3-7g46 is a security vulnerability in Simplesamlphp/simplesamlphp involving Link injection in SimpleSAMLphp under CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection').
Which Simplesamlphp/simplesamlphp versions are affected?
Affected versions include releases prior to 1.14.4 across affected packages: simplesamlphp/simplesamlphp.
What version fixes GHSA-2r3v-q9x3-7g46?
Upgrading to 1.14.4 (or the latest patched release for your respective branch) resolves the vulnerability.
Is simplesamlphp/simplesamlphp affected?
Yes, simplesamlphp/simplesamlphp is affected in releases prior to 1.14.4. Upgrade your dependency to 1.14.4 or later.
What is the CVSS score of GHSA-2r3v-q9x3-7g46?
GHSA-2r3v-q9x3-7g46 has a CVSS v3.1 base score of 3.7 (LOW) with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N.
What CWE is associated with GHSA-2r3v-q9x3-7g46?
GHSA-2r3v-q9x3-7g46 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 GHSA-2r3v-q9x3-7g46?
Run the dependency tree command: 'inspect dependencies for simplesamlphp/simplesamlphp'. 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-2r3v-q9x3-7g46",
  "modified" : "2021-08-19T16:31:00Z",
  "published" : "2020-01-24T21:27:16Z",
  "aliases" : [ ],
  "summary" : "Link injection in SimpleSAMLphp",
  "details" : "### Background\nSeveral scripts part of SimpleSAMLphp display a web page with links obtained from the request parameters. This allows us to enhance usability, as the users are presented with links they can follow after completing a certain action, like logging out.\n\n### Description\nThe following scripts were not checking the URLs obtained via the HTTP request before displaying them as the target of links that the user may click on:\n\n- `www/logout.php`\n- `modules/core/www/no_cookie.php`\n\nThe issue allowed attackers to display links targeting a malicious website inside a trusted site running SimpleSAMLphp, due to the lack of security checks involving the `link_href` and `retryURL` HTTP parameters, respectively. The issue was resolved by including a verification of the URLs received in the request against a white list of websites specified in the `trusted.url.domains` configuration option.\n\n### Affected versions\nAll SimpleSAMLphp versions prior to 1.14.4.\n\n### Impact\nA remote attacker could craft a link pointing to a trusted website running SimpleSAMLphp, including a parameter pointing to a malicious website, and try to fool the victim into visiting that website by clicking on a link in the page presented by SimpleSAMLphp.\n\n### Resolution\nUpgrade to the latest version.\n\n### Credit\nThis security issue was discovered and reported by John Page (hyp3rlinx).",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "simplesamlphp/simplesamlphp"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.14.4"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/simplesamlphp/simplesamlphp/security/advisories/GHSA-2r3v-q9x3-7g46"
  }, {
    "type" : "WEB",
    "url" : "https://snyk.io/vuln/SNYK-PHP-SIMPLESAMLPHPSIMPLESAMLPHP-70160"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-74" ],
    "severity" : "LOW",
    "github_reviewed" : true,
    "github_reviewed_at" : "2020-01-24T21:15:56Z",
    "nvd_published_at" : null
  }
}