CVE-2018-15756
Denial of Service in Spring Framework
Description
Spring Framework, version 5.1, versions 5.0.x prior to 5.0.10, versions 4.3.x prior to 4.3.20, and older unsupported versions on the 4.2.x branch provide support for range requests when serving static resources through the ResourceHttpRequestHandler, or starting in 5.0 when an annotated controller returns an org.springframework.core.io.Resource. A malicious user (or attacker) can add a range header with a high number of ranges, or with wide ranges that overlap, or both, for a denial of service attack. This vulnerability affects applications that depend on either spring-webmvc or spring-webflux. Such applications must also have a registration for serving static resources (e.g. JS, CSS, images, and others), or have an annotated controller that returns an org.springframework.core.io.Resource. Spring Boot applications that depend on spring-boot-starter-web or spring-boot-starter-webflux are ready to serve static resources out of the box and are therefore vulnerable.
How to fix CVE-2018-15756
To remediate CVE-2018-15756, upgrade the affected package to a fixed version below.
- —upgrade to 4.3.21-1 or later
- —upgrade to 5.1.1.RELEASE or later
Is CVE-2018-15756 being exploited?
Moderate — EPSS is 20.1%. Track this CVE but it's not at the top of the prioritisation list.
Affected packages (2)
- from 0, < 4.3.21-1
- >= 5.1.0.RELEASE, < 5.1.1.RELEASE
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |