CVE-2018-6356: Jenkins core Improper Limitation Of A Pathname Vulnerability
MODERATECVE-2018-6356 is a MODERATE (CVSS 6.5) improper limitation of a pathname vulnerability (CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')) affecting Jenkins core libraries in the Maven ecosystem. The issue involves improper limitation of a pathname to a restricted directory in jenkins. Remediation is available by upgrading affected packages to version 2.89.4, 2.107.
CVE-2018-6356 at a Glance
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:L/UI:N/S:U/C:H/I:N/A:N).
How to Fix CVE-2018-6356
To remediate this vulnerability, upgrade all affected Jenkins core dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.
<dependency>
<groupId>org.jenkins-ci.main</groupId>
<artifactId>jenkins-core</artifactId>
<version>2.89.4</version>
</dependency><dependency>
<groupId>org.jenkins-ci.main</groupId>
<artifactId>jenkins-core</artifactId>
<version>2.107</version>
</dependency>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.mainHow to Check if You Are Affected
To determine whether your Java application is affected by CVE-2018-6356, inspect your build dependencies using the Maven Dependency Plugin:
mvn dependency:tree -Dincludes=org.jenkins-ci.mainAnalyze the terminal output to locate any version of Jenkins core in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.89.4), your application is affected.
Note: The mvn dependency:tree -Dincludes=org.jenkins-ci.main 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-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal'), where the product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. In Jenkins core, 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
CVE-2018-6356 Affected Jenkins core Versions
2 component(s)| Product / Package | Ecosystem | Affected Versions | Fixed Version |
|---|---|---|---|
|
org.jenkins-ci.main:jenkins-core
|
Maven |
< 2.89.4
|
2.89.4
|
|
org.jenkins-ci.main:jenkins-core
|
Maven |
≥ 2.90
< 2.107
|
2.107
|
References
Frequently Asked Questions
What is CVE-2018-6356?
Which Jenkins core versions are affected?
What version fixes CVE-2018-6356?
Is jenkins-core affected?
What is the CVSS score of CVE-2018-6356?
What CWE is associated with CVE-2018-6356?
How can I check Maven dependencies for CVE-2018-6356?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-5p59-v5wm-77v4",
"modified" : "2024-03-01T22:19:58Z",
"published" : "2022-05-13T01:01:01Z",
"aliases" : [ "CVE-2018-6356" ],
"summary" : "Improper Limitation of a Pathname to a Restricted Directory in Jenkins",
"details" : "Jenkins before 2.107 and Jenkins LTS before 2.89.4 did not properly prevent specifying relative paths that escape a base directory for URLs accessing plugin resource files. This allowed users with Overall/Read permission to download files from the Jenkins master they should not have access to. On Windows, any file accessible to the Jenkins master process could be downloaded. On other operating systems, any file within the Jenkins home directory accessible to the Jenkins master process could be downloaded.",
"severity" : [ {
"type" : "CVSS_V3",
"score" : "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N"
} ],
"affected" : [ {
"package" : {
"ecosystem" : "Maven",
"name" : "org.jenkins-ci.main:jenkins-core"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "0"
}, {
"fixed" : "2.89.4"
} ]
} ]
}, {
"package" : {
"ecosystem" : "Maven",
"name" : "org.jenkins-ci.main:jenkins-core"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "2.90"
}, {
"fixed" : "2.107"
} ]
} ]
} ],
"references" : [ {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2018-6356"
}, {
"type" : "WEB",
"url" : "https://github.com/jenkinsci/jenkins/commit/9de62915807deab61d6e780eed660428f9889b51"
}, {
"type" : "WEB",
"url" : "https://github.com/jenkinsci/jenkins/commit/eb03a42078f29dbed3742b8740c95e02890e4545"
}, {
"type" : "WEB",
"url" : "https://github.com/jenkinsci/jenkins"
}, {
"type" : "WEB",
"url" : "https://jenkins.io/security/advisory/2018-02-14"
}, {
"type" : "WEB",
"url" : "https://web.archive.org/web/20200227130607/http://www.securityfocus.com/bid/103037"
}, {
"type" : "WEB",
"url" : "https://www.oracle.com/security-alerts/cpuapr2022.html"
}, {
"type" : "WEB",
"url" : "http://www.openwall.com/lists/oss-security/2018/02/14/1"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-22" ],
"severity" : "MODERATE",
"github_reviewed" : true,
"github_reviewed_at" : "2022-06-28T23:52:17Z",
"nvd_published_at" : "2018-02-20T15:29:00Z"
}
}