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Denial of service in Jenkins Core

Moderate severity GitHub Reviewed Published Mar 10, 2023 to the GitHub Advisory Database • Updated Jan 5, 2024

Package

maven org.jenkins-ci.main:jenkins-core (Maven)

Affected versions

< 2.375.4
>= 2.388, < 2.394
>= 2.376, < 2.387.1

Patched versions

2.375.4
2.394
2.387.1

Description

Jenkins 2.393 and earlier, LTS 2.375.3 and earlier, and prior to LTS 2.387.1 is affected by the Apache Commons FileUpload library’s vulnerability CVE-2023-24998. This library is used to process uploaded files via the Stapler web framework (usually through StaplerRequest#getFile) and MultipartFormDataParser in Jenkins.

This allows attackers to cause a denial of service (DoS) by sending crafted requests to HTTP endpoints processing file uploads.

Jenkins 2.394, LTS 2.375.4, and LTS 2.387.1 limits the number of request parts to be processed to 1000. Specific endpoints receiving only simple form submissions have a lower limit.

References

Published by the National Vulnerability Database Mar 10, 2023
Published to the GitHub Advisory Database Mar 10, 2023
Reviewed Mar 17, 2023
Last updated Jan 5, 2024

Severity

Moderate

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS score

0.086%
(37th percentile)

Weaknesses

CVE ID

CVE-2023-27900

GHSA ID

GHSA-frgr-c5f2-8qhh

Source code

No known source code

Credits

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