Vulnerability in Spring FrameworkIssue date: 29-04-2019
Affects versions: 12.6, 11.2
Issue ID: SECURITY-96
Affected Product Version(s)
This vulnerability affects all versions of both CMS and delivery applications based on Bloomreach Experience Manager prior to version 11.2.12, 12.6.2, and earlier.
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.
Although default usage of this library within the Bloomreach Experience Manager product is not vulnerable, project specific usages of this third-party code within a customer project may be vulnerable.
Every customer is strongly advised to upgrade as soon as possible to the latest maintenance release as indicated above, or higher. This can be done by simply incrementing the version number of the parent POM for the implementation project.