CVE-2020-2160: Jenkins core Cross-Site Request Forgery Vulnerability
HIGHCVE-2020-2160 is a HIGH (CVSS 8.8) cross-site request forgery vulnerability (CWE-435: Improper Interaction Between Multiple Correctly-Behaving Entities) affecting Jenkins core libraries in the Maven ecosystem. The issue involves cross-site request forgery in jenkins. Remediation is available by upgrading affected packages to version 2.204.6, 2.228.
CVE-2020-2160 at a Glance
Security Impact
CVSS: 8.8
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:R/S:U/C:H/I:H/A:H).
How to Fix CVE-2020-2160
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>2.204.6</version>
</dependency><dependency>
<groupId>org.jenkins-ci.main</groupId>
<artifactId>jenkins-core</artifactId>
<version>2.228</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-2020-2160, 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 2.204.6), 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-435: Improper Interaction Between Multiple Correctly-Behaving Entities, where an interaction error occurs when two entities have correct behavior when running independently of each other, but when they are integrated as components in a larger system or process, they introduce incorrect behaviors that may cause resultant weaknesses. 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-2020-2160 Affected Jenkins core Versions
2 component(s)| Product / Package | Ecosystem | Affected Versions | Fixed Version |
|---|---|---|---|
|
org.jenkins-ci.main:jenkins-core
|
Maven |
< 2.204.6
|
2.204.6
|
|
org.jenkins-ci.main:jenkins-core
|
Maven |
≥ 2.205
< 2.228
|
2.228
|
References
Frequently Asked Questions
What is CVE-2020-2160?
Which Jenkins core versions are affected?
What version fixes CVE-2020-2160?
Is jenkins-core affected?
What is the CVSS score of CVE-2020-2160?
What CWE is associated with CVE-2020-2160?
How can I check Maven dependencies for CVE-2020-2160?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-c735-g9f2-2mvp",
"modified" : "2024-03-12T16:01:44Z",
"published" : "2022-05-24T17:12:40Z",
"aliases" : [ "CVE-2020-2160" ],
"summary" : "Cross-Site Request Forgery in Jenkins",
"details" : "An extension point in Jenkins allows selectively disabling cross-site request forgery (CSRF) protection for specific URLs.\n\nImplementations of that extension point received a different representation of the URL path than the Stapler web framework uses to dispatch requests in Jenkins 2.227 and earlier, LTS 2.204.5 and earlier. This discrepancy allowed attackers to craft URLs that would bypass the CSRF protection of any target URL.\n\nJenkins now uses the same representation of the URL path to decide whether CSRF protection is needed for a given URL as the Stapler web framework uses.\n\nIn case of problems, administrators can disable this security fix by setting the system property `hudson.security.csrf.CrumbFilter.UNPROCESSED_PATHINFO` to `true`.\n\nAs an additional safeguard, semicolon (`;`) characters in the path part of a URL are now banned by default. Administrators can disable this protection by setting the system property `jenkins.security.SuspiciousRequestFilter.allowSemicolonsInPath` to `true`.",
"severity" : [ {
"type" : "CVSS_V3",
"score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"
} ],
"affected" : [ {
"package" : {
"ecosystem" : "Maven",
"name" : "org.jenkins-ci.main:jenkins-core"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "0"
}, {
"fixed" : "2.204.6"
} ]
} ],
"database_specific" : {
"last_known_affected_version_range" : "<= 2.204.5"
}
}, {
"package" : {
"ecosystem" : "Maven",
"name" : "org.jenkins-ci.main:jenkins-core"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "2.205"
}, {
"fixed" : "2.228"
} ]
} ],
"database_specific" : {
"last_known_affected_version_range" : "<= 2.227"
}
} ],
"references" : [ {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-2160"
}, {
"type" : "WEB",
"url" : "https://github.com/jenkinsci/jenkins/commit/f479652171f4ab854747de64b22bf59adb35fb8f"
}, {
"type" : "WEB",
"url" : "https://github.com/jenkinsci/jenkins/commit/f7cf28355973df1ca6eb19066370bf70b10742f7"
}, {
"type" : "PACKAGE",
"url" : "https://github.com/jenkinsci/jenkins"
}, {
"type" : "WEB",
"url" : "https://jenkins.io/security/advisory/2020-03-25/#SECURITY-1774"
}, {
"type" : "WEB",
"url" : "http://www.openwall.com/lists/oss-security/2020/03/25/2"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-352", "CWE-435" ],
"severity" : "HIGH",
"github_reviewed" : true,
"github_reviewed_at" : "2022-06-24T00:58:56Z",
"nvd_published_at" : "2020-03-25T17:15:00Z"
}
}