CVE-2018-5387: Gogentooss/samlbase Wizkunde SAMLBase SAML Bypass Vulnerability

HIGH
Advisory Identifier: GHSA-7gh2-8q93-87hp
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CVSS 7.5
CWE-347
Published
Advisory Summary

CVE-2018-5387 is a HIGH (CVSS 7.5) wizkunde samlbase saml bypass vulnerability (CWE-347: Improper Verification of Cryptographic Signature) affecting Gogentooss/samlbase libraries in the Packagist ecosystem. The issue involves wizkunde samlbase saml bypass. Remediation is available by upgrading affected packages to version 1.2.7.

CVE-2018-5387 at a Glance

CVE Identifier CVE-2018-5387
GHSA Identifier GHSA-7gh2-8q93-87hp
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-347: Improper Verification of Cryptographic Signature
Affected Product Gogentooss/samlbase
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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/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 None (C:N)
Integrity High (I:H)
Availability None (A:N)

How to Fix CVE-2018-5387

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

gogentooss/samlbase fixed: 1.2.7 
Upgrade gogentooss/samlbase to 1.2.7
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 gogentooss/samlbase

How to Check if You Are Affected

To determine whether your application is affected by CVE-2018-5387, inspect your project dependencies for Gogentooss/samlbase:

inspect dependencies for gogentooss/samlbase

Analyze the terminal output to locate any version of Gogentooss/samlbase in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.2.7), 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-347: Improper Verification of Cryptographic Signature, where the product does not verify, or incorrectly verifies, the cryptographic signature for data. In Gogentooss/samlbase, 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

Wizkunde SAMLBase may incorrectly utilize the results of XML DOM traversal and canonicalization APIs in such a way that an attacker may be able to manipulate the SAML data without invalidating the cryptographic signature, allowing the attack to potentially bypass authentication to SAML service providers.

CVE-2018-5387 Affected Gogentooss/samlbase Versions

1 component(s)
Fixed Versions:
1.2.7
Product / Package Ecosystem Affected Versions Fixed Version
gogentooss/samlbase
 Packagist
< 1.2.7
1.2.7

References

NVD — CVE-2018-5387 NVD
https://nvd.nist.gov/vuln/detail/CVE-2018-5387
Gogentooss/samlbase Source Repository REPOSITORY
https://github.com/GoGentoOSS/SAMLBase/issues/3
Security Fix Commit FIX COMMIT
https://github.com/GoGentoOSS/SAMLBase/commit/482cdf8c090e0f1179073034ebcb609ac7c3f5b3
duo.com/blog/duo-finds-saml... WEB
https://duo.com/blog/duo-finds-saml-vulnerabilities-affecting-multiple-implementations
Gogentooss/samlbase Source Repository REPOSITORY
https://github.com/GoGentoOSS/SAMLBase
www.kb.cert.org/vuls/id/475445 WEB
https://www.kb.cert.org/vuls/id/475445

Frequently Asked Questions

What is CVE-2018-5387?
CVE-2018-5387 is a security vulnerability in Gogentooss/samlbase involving Wizkunde SAMLBase SAML Bypass under CWE-347: Improper Verification of Cryptographic Signature.
Which Gogentooss/samlbase versions are affected?
Affected versions include releases prior to 1.2.7 across affected packages: gogentooss/samlbase.
What version fixes CVE-2018-5387?
Upgrading to 1.2.7 (or the latest patched release for your respective branch) resolves the vulnerability.
Is gogentooss/samlbase affected?
Yes, gogentooss/samlbase is affected in releases prior to 1.2.7. Upgrade your dependency to 1.2.7 or later.
What is the CVSS score of CVE-2018-5387?
CVE-2018-5387 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.
What CWE is associated with CVE-2018-5387?
CVE-2018-5387 is classified under CWE-347: Improper Verification of Cryptographic Signature (The product does not verify, or incorrectly verifies, the cryptographic signature for data.).
How can I check Packagist dependencies for CVE-2018-5387?
Run the dependency tree command: 'inspect dependencies for gogentooss/samlbase'. 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-7gh2-8q93-87hp",
  "modified" : "2023-10-05T19:26:56Z",
  "published" : "2022-05-13T01:02:57Z",
  "aliases" : [ "CVE-2018-5387" ],
  "summary" : " Wizkunde SAMLBase SAML Bypass",
  "details" : "Wizkunde SAMLBase may incorrectly utilize the results of XML DOM traversal and canonicalization APIs in such a way that an attacker may be able to manipulate the SAML data without invalidating the cryptographic signature, allowing the attack to potentially bypass authentication to SAML service providers.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "gogentooss/samlbase"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.2.7"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2018-5387"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/GoGentoOSS/SAMLBase/issues/3"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/GoGentoOSS/SAMLBase/commit/482cdf8c090e0f1179073034ebcb609ac7c3f5b3"
  }, {
    "type" : "WEB",
    "url" : "https://duo.com/blog/duo-finds-saml-vulnerabilities-affecting-multiple-implementations"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/GoGentoOSS/SAMLBase"
  }, {
    "type" : "WEB",
    "url" : "https://www.kb.cert.org/vuls/id/475445"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-347" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-07-07T19:21:30Z",
    "nvd_published_at" : "2018-07-24T15:29:00Z"
  }
}