CVE-2017-18121: Simplesamlphp/simplesamlphp Cross-Site Scripting Vulnerability

MODERATE
Advisory Identifier: GHSA-fv7m-wc3v-wr3w
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CVSS 6.1
CWE-79
Published
Advisory Summary

CVE-2017-18121 is a MODERATE (CVSS 6.1) cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Simplesamlphp/simplesamlphp libraries in the Packagist ecosystem. The issue involves simplesamlphp xss vulnerability. Remediation is available by upgrading affected packages to version 1.14.16.

CVE-2017-18121 at a Glance

CVE Identifier CVE-2017-18121
GHSA Identifier GHSA-fv7m-wc3v-wr3w
Severity MODERATE
CVSS v3.1 Base Score 6.1
CWE Classification CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Product Simplesamlphp/simplesamlphp
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 6.1

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:R/S:C/C:L/I:L/A:N).

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

How to Fix CVE-2017-18121

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: 1.14.16 
Upgrade simplesamlphp/simplesamlphp to 1.14.16
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 CVE-2017-18121, 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 1.14.16), 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-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'), where the product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. 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

The consentAdmin module in SimpleSAMLphp through 1.14.15 is vulnerable to a Cross-Site Scripting attack, allowing an attacker to craft links that could execute arbitrary JavaScript code on the victim's web browser.

CVE-2017-18121 Affected Simplesamlphp/simplesamlphp Versions

1 component(s)
Fixed Versions:
1.14.16
Product / Package Ecosystem Affected Versions Fixed Version
simplesamlphp/simplesamlphp
 Packagist
≥ 1.12.0
< 1.14.16
1.14.16

References

NVD — CVE-2017-18121 NVD
https://nvd.nist.gov/vuln/detail/CVE-2017-18121
Simplesamlphp/simplesamlphp Source Repository REPOSITORY
https://github.com/FriendsOfPHP/security-advisories/blob/master/simplesamlphp/simplesamlphp/CVE-2017-18121.yaml
lists.debian.org/debian-lts-announce... WEB
https://lists.debian.org/debian-lts-announce/2018/02/msg00008.html
Simplesamlphp/simplesamlphp Security Information SECURITY
https://simplesamlphp.org/security/201709-01
Simplesamlphp/simplesamlphp Security Information SECURITY
https://www.debian.org/security/2018/dsa-4127

Frequently Asked Questions

What is CVE-2017-18121?
CVE-2017-18121 is a security vulnerability in Simplesamlphp/simplesamlphp involving SimpleSAMLphp XSS Vulnerability under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which Simplesamlphp/simplesamlphp versions are affected?
Affected versions include releases prior to 1.14.16 across affected packages: simplesamlphp/simplesamlphp.
What version fixes CVE-2017-18121?
Upgrading to 1.14.16 (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 1.14.16. Upgrade your dependency to 1.14.16 or later.
What is the CVSS score of CVE-2017-18121?
CVE-2017-18121 has a CVSS v3.1 base score of 6.1 (MODERATE) with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
What CWE is associated with CVE-2017-18121?
CVE-2017-18121 is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.).
How can I check Packagist dependencies for CVE-2017-18121?
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-fv7m-wc3v-wr3w",
  "modified" : "2023-07-26T21:49:34Z",
  "published" : "2022-05-14T01:04:10Z",
  "aliases" : [ "CVE-2017-18121" ],
  "summary" : "SimpleSAMLphp XSS Vulnerability",
  "details" : "The consentAdmin module in SimpleSAMLphp through 1.14.15 is vulnerable to a Cross-Site Scripting attack, allowing an attacker to craft links that could execute arbitrary JavaScript code on the victim's web browser.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "simplesamlphp/simplesamlphp"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "1.12.0"
      }, {
        "fixed" : "1.14.16"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2017-18121"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/FriendsOfPHP/security-advisories/blob/master/simplesamlphp/simplesamlphp/CVE-2017-18121.yaml"
  }, {
    "type" : "WEB",
    "url" : "https://lists.debian.org/debian-lts-announce/2018/02/msg00008.html"
  }, {
    "type" : "WEB",
    "url" : "https://simplesamlphp.org/security/201709-01"
  }, {
    "type" : "WEB",
    "url" : "https://www.debian.org/security/2018/dsa-4127"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-07-26T21:49:34Z",
    "nvd_published_at" : "2018-02-02T15:29:00Z"
  }
}