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In Karaf, JMX authentication takes place using JAAS and authorization takes place using ACL files. By default, only an "admin" can actually invoke on an MBean. However there is a vulnerability there for someone who is not an admin, but has a "viewer" role. In the 'etc/jmx.acl.cfg', such as role can call get*. It's possible to authenticate as a viewer role + invokes on the MLet getMBeansFromURL method, which goes off to a remote server to fetch the desired MBean, which is then registered in Karaf. At this point the attack fails as "viewer" doesn't have the permission to invoke on the MBean. Still, it could act as a SSRF style attack and also it essentially allows a "viewer" role to pollute the MBean registry, which is a kind of privilege escalation. The vulnerability is low as it's possible to add a ACL to limit access. Users should update to Apache Karaf 4.2.9 or newer.

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Apache Karaf 代码问题漏洞

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 4.2.9之前版本中存在代码问题漏洞。攻击者可通过发送特制请求利用该漏洞在系统上执行任意代码。

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