CVE-2018-1000602: Saml Jenkins SAML Plugin Session Fixation Vulnerability

MODERATE
Advisory Identifier: GHSA-4pjx-86pg-x4j5
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CVSS 6.5
CWE-384
Published
Advisory Summary

CVE-2018-1000602 is a MODERATE (CVSS 6.5) jenkins saml plugin session fixation vulnerability (CWE-384: Session Fixation) affecting Saml libraries in the Maven ecosystem. The issue involves jenkins saml plugin session fixation vulnerability. Remediation is available by upgrading affected packages to version 1.0.7.

CVE-2018-1000602 at a Glance

CVE Identifier CVE-2018-1000602
GHSA Identifier GHSA-4pjx-86pg-x4j5
Severity MODERATE
CVSS v3.1 Base Score 6.5
CWE Classification CWE-384: Session Fixation
Affected Product Saml
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 6.5

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:R/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 Required (UI:R)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity None (I:N)
Availability None (A:N)

How to Fix CVE-2018-1000602

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

org.jenkins-ci.plugins:saml fixed: 1.0.7 
<dependency>
    <groupId>org.jenkins-ci.plugins</groupId>
    <artifactId>saml</artifactId>
    <version>1.0.7</version>
</dependency>
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

mvn dependency:tree -Dincludes=org.jenkins-ci.plugins

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2018-1000602, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree -Dincludes=org.jenkins-ci.plugins

Analyze the terminal output to locate any version of Saml in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.0.7), your application is affected.

Note: The mvn dependency:tree -Dincludes=org.jenkins-ci.plugins command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-384: Session Fixation, where authenticating a user, or otherwise establishing a new user session, without invalidating any existing session identifier gives an attacker the opportunity to steal authenticated sessions. In Saml, 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

A session fixation vulnerability exists in Jenkins SAML Plugin 1.0.6 and earlier in SamlSecurityRealm.java that allows unauthorized attackers to impersonate another users if they can control the pre-authentication session. SAML Plugin 1.0.7 invalidates the previous session during login and creates a new one.

CVE-2018-1000602 Affected Saml Versions

1 component(s)
Fixed Versions:
1.0.7
Product / Package Ecosystem Affected Versions Fixed Version
org.jenkins-ci.plugins:saml
maven/org.jenkins-ci.plugins/saml
Maven
< 1.0.7
1.0.7

References

NVD — CVE-2018-1000602 NVD
https://nvd.nist.gov/vuln/detail/CVE-2018-1000602
Security Fix Commit FIX COMMIT
https://github.com/jenkinsci/saml-plugin/commit/fd95d576bda64b278071428c7fbee03c02f843c0
Saml Source Repository REPOSITORY
https://github.com/jenkinsci/saml-plugin
Saml Security Information SECURITY
https://jenkins.io/security/advisory/2018-06-25/#SECURITY-916

Frequently Asked Questions

What is CVE-2018-1000602?
CVE-2018-1000602 is a security vulnerability in Saml involving Jenkins SAML Plugin Session Fixation vulnerability under CWE-384: Session Fixation.
Which Saml versions are affected?
Affected versions include releases prior to 1.0.7 across affected packages: org.jenkins-ci.plugins:saml.
What version fixes CVE-2018-1000602?
Upgrading to 1.0.7 (or the latest patched release for your respective branch) resolves the vulnerability.
Is saml affected?
Yes, org.jenkins-ci.plugins:saml is affected in releases prior to 1.0.7. Upgrade your dependency to 1.0.7 or later.
What is the CVSS score of CVE-2018-1000602?
CVE-2018-1000602 has a CVSS v3.1 base score of 6.5 (MODERATE) with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N.
What CWE is associated with CVE-2018-1000602?
CVE-2018-1000602 is classified under CWE-384: Session Fixation (Authenticating a user, or otherwise establishing a new user session, without invalidating any existing session identifier gives an attacker the opportunity to steal authenticated sessions.).
How can I check Maven dependencies for CVE-2018-1000602?
Run the dependency tree command: 'mvn dependency:tree -Dincludes=org.jenkins-ci.plugins'. 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-4pjx-86pg-x4j5",
  "modified" : "2022-12-12T17:10:16Z",
  "published" : "2022-05-14T03:07:02Z",
  "aliases" : [ "CVE-2018-1000602" ],
  "summary" : "Jenkins SAML Plugin Session Fixation vulnerability",
  "details" : "A session fixation vulnerability exists in Jenkins SAML Plugin 1.0.6 and earlier in SamlSecurityRealm.java that allows unauthorized attackers to impersonate another users if they can control the pre-authentication session. SAML Plugin 1.0.7 invalidates the previous session during login and creates a new one.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.jenkins-ci.plugins:saml"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.0.7"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 1.0.6"
    }
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2018-1000602"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/jenkinsci/saml-plugin/commit/fd95d576bda64b278071428c7fbee03c02f843c0"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/jenkinsci/saml-plugin"
  }, {
    "type" : "WEB",
    "url" : "https://jenkins.io/security/advisory/2018-06-25/#SECURITY-916"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-384" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-12-12T17:10:16Z",
    "nvd_published_at" : "2018-06-26T17:29:00Z"
  }
}