CVE-2020-2104: Jenkins core Memory Usage Graphs Accessible To Vulnerability
MODERATECVE-2020-2104 is a MODERATE (CVSS 4.3) memory usage graphs accessible to vulnerability (CWE-285: Improper Authorization) affecting Jenkins core libraries in the Maven ecosystem. The issue involves memory usage graphs accessible to anyone with overall/read. Remediation is available by upgrading affected packages to version 2.204.2, 2.219.
CVE-2020-2104 at a Glance
Security Impact
CVSS: 4.3
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:L/I:N/A:N).
How to Fix CVE-2020-2104
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>2.204.2</version>
</dependency><dependency>
<groupId>org.jenkins-ci.main</groupId>
<artifactId>jenkins-core</artifactId>
<version>2.219</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-2020-2104, 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 2.204.2), 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-285: Improper Authorization, where the product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. 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-2020-2104 Affected Jenkins core Versions
2 component(s)| Product / Package | Ecosystem | Affected Versions | Fixed Version |
|---|---|---|---|
|
org.jenkins-ci.main:jenkins-core
|
Maven |
< 2.204.2
|
2.204.2
|
|
org.jenkins-ci.main:jenkins-core
|
Maven |
≥ 2.205
< 2.219
|
2.219
|
References
Frequently Asked Questions
What is CVE-2020-2104?
Which Jenkins core versions are affected?
What version fixes CVE-2020-2104?
Is jenkins-core affected?
What is the CVSS score of CVE-2020-2104?
What CWE is associated with CVE-2020-2104?
How can I check Maven dependencies for CVE-2020-2104?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-r78q-qgx6-64pp",
"modified" : "2022-12-19T21:13:29Z",
"published" : "2022-05-24T17:07:40Z",
"aliases" : [ "CVE-2020-2104" ],
"summary" : "Memory usage graphs accessible to anyone with Overall/Read",
"details" : "Jenkins includes a feature that shows a JVM memory usage chart for the Jenkins controller.\n\nAccess to the chart in Jenkins 2.218 and earlier, LTS 2.204.1 and earlier requires no permissions beyond the general Overall/Read, allowing users who are not administrators to view JVM memory usage data.\n\nJenkins 2.219, LTS 2.204.2 now requires Overall/Administer permissions to view the JVM memory usage chart.",
"severity" : [ {
"type" : "CVSS_V3",
"score" : "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N"
} ],
"affected" : [ {
"package" : {
"ecosystem" : "Maven",
"name" : "org.jenkins-ci.main:jenkins-core"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "0"
}, {
"fixed" : "2.204.2"
} ]
} ],
"database_specific" : {
"last_known_affected_version_range" : "<= 2.204.1"
}
}, {
"package" : {
"ecosystem" : "Maven",
"name" : "org.jenkins-ci.main:jenkins-core"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "2.205"
}, {
"fixed" : "2.219"
} ]
} ],
"database_specific" : {
"last_known_affected_version_range" : "<= 2.218"
}
} ],
"references" : [ {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-2104"
}, {
"type" : "WEB",
"url" : "https://github.com/jenkinsci/jenkins/commit/7d44836fad0f49341ae2a61de06dbb556014a2df"
}, {
"type" : "WEB",
"url" : "https://access.redhat.com/errata/RHBA-2020:0402"
}, {
"type" : "WEB",
"url" : "https://access.redhat.com/errata/RHBA-2020:0675"
}, {
"type" : "WEB",
"url" : "https://access.redhat.com/errata/RHSA-2020:0681"
}, {
"type" : "WEB",
"url" : "https://access.redhat.com/errata/RHSA-2020:0683"
}, {
"type" : "PACKAGE",
"url" : "https://github.com/jenkinsci/jenkins"
}, {
"type" : "WEB",
"url" : "https://jenkins.io/security/advisory/2020-01-29/#SECURITY-1650"
}, {
"type" : "WEB",
"url" : "http://www.openwall.com/lists/oss-security/2020/01/29/1"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-285", "CWE-863" ],
"severity" : "MODERATE",
"github_reviewed" : true,
"github_reviewed_at" : "2022-12-19T21:13:29Z",
"nvd_published_at" : "2020-01-29T16:15:00Z"
}
}