漏洞描述

Apache Karaf是美国阿帕奇（Apache）基金会的一款用于部署应用程序和组件的轻量级的OSGi（Java动态化模块化系统）容器。 Apache Karaf 4.2.3之前版本中存在安全漏洞。远程攻击者可利用该漏洞覆盖用户设备上的任意文件。

Apache Karaf kar deployer reads .kar archives and extracts the paths from the "repository/" and "resources/" entries in the zip file. It then writes out the content of these paths to the Karaf repo and resources directories. However, it doesn't do any validation on the paths in the zip file. This means that a malicious user could craft a .kar file with ".." directory names and break out of the directories to write arbitrary content to the filesystem. This is the "Zip-slip" vulnerability - https://snyk.io/research/zip-slip-vulnerability. This vulnerability is low if the Karaf process user has limited permission on the filesystem. Any Apache Karaf releases prior 4.2.3 is impacted.