CVE-2023-43496: Jenkins core Jenkins Temporary Plugin File Created Vulnerability
HIGHCVE-2023-43496 is a HIGH (CVSS 7.0) jenkins temporary plugin file created vulnerability (CWE-276: Incorrect Default Permissions) affecting Jenkins core libraries in the Maven ecosystem. The issue involves jenkins temporary plugin file created with insecure permissions. Remediation is available by upgrading affected packages to version 2.414.2, 2.424.
CVE-2023-43496 at a Glance
Security Impact
CVSS: 7.0
The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H).
How to Fix CVE-2023-43496
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>2.414.2</version>
</dependency><dependency>
<groupId>org.jenkins-ci.main</groupId>
<artifactId>jenkins-core</artifactId>
<version>2.424</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-2023-43496, 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 2.414.2), 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-276: Incorrect Default Permissions, where during installation, installed file permissions are set to allow anyone to modify those files. 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-2023-43496 Affected Jenkins core Versions
2 component(s)| Product / Package | Ecosystem | Affected Versions | Fixed Version |
|---|---|---|---|
|
org.jenkins-ci.main:jenkins-core
|
Maven |
≥ 2.50
< 2.414.2
|
2.414.2
|
|
org.jenkins-ci.main:jenkins-core
|
Maven |
≥ 2.415
< 2.424
|
2.424
|
References
Frequently Asked Questions
What is CVE-2023-43496?
Which Jenkins core versions are affected?
What version fixes CVE-2023-43496?
Is jenkins-core affected?
What is the CVSS score of CVE-2023-43496?
What CWE is associated with CVE-2023-43496?
How can I check Maven dependencies for CVE-2023-43496?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-55wp-3pq4-w8p9",
"modified" : "2025-05-02T18:54:30Z",
"published" : "2023-09-20T18:30:21Z",
"aliases" : [ "CVE-2023-43496" ],
"summary" : "Jenkins temporary plugin file created with insecure permissions ",
"details" : "Jenkins creates a temporary file when a plugin is deployed directly from a URL.\n\nJenkins 2.423 and earlier, LTS 2.414.1 and earlier creates this temporary file in the system temporary directory with the default permissions for newly created files.\n\nIf these permissions are overly permissive, they may allow attackers with access to the Jenkins controller file system to read and write the file before it is installed in Jenkins, potentially resulting in arbitrary code execution.\n\nThis vulnerability only affects operating systems using a shared temporary directory for all users (typically Linux). Additionally, the default permissions for newly created files generally only allow attackers to read the temporary file, but not write to it.\n\nThis issue complements SECURITY-2823, which affected plugins uploaded from an administrator’s computer.\nJenkins 2.424, LTS 2.414.2 creates the temporary file in a subdirectory with more restrictive permissions.\n\nAs a workaround, you can change your default temporary-file directory using the Java system property java.io.tmpdir, if you’re concerned about this issue but unable to immediately update Jenkins.",
"severity" : [ {
"type" : "CVSS_V3",
"score" : "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H"
} ],
"affected" : [ {
"package" : {
"ecosystem" : "Maven",
"name" : "org.jenkins-ci.main:jenkins-core"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "2.50"
}, {
"fixed" : "2.414.2"
} ]
} ]
}, {
"package" : {
"ecosystem" : "Maven",
"name" : "org.jenkins-ci.main:jenkins-core"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "2.415"
}, {
"fixed" : "2.424"
} ]
} ]
} ],
"references" : [ {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2023-43496"
}, {
"type" : "WEB",
"url" : "https://github.com/jenkinsci/jenkins/commit/df7c4ccda8976c06bf31b8fb9938f26fc38501ca"
}, {
"type" : "WEB",
"url" : "https://www.jenkins.io/security/advisory/2023-09-20/#SECURITY-3072"
}, {
"type" : "WEB",
"url" : "http://www.openwall.com/lists/oss-security/2023/09/20/5"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-276" ],
"severity" : "HIGH",
"github_reviewed" : true,
"github_reviewed_at" : "2023-09-21T17:21:21Z",
"nvd_published_at" : "2023-09-20T17:15:11Z"
}
}