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CVE-2020-11980

Status Candidate

Overview

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.

Related Files

Red Hat Security Advisory 2020-5568-01
Posted Dec 16, 2020
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2020-5568-01 - This release of Red Hat Fuse 7.8.0 serves as a replacement for Red Hat Fuse 7.7, and includes bug fixes and enhancements, which are documented in the Release Notes document linked to in the References. Issues addressed include XML injection, bypass, code execution, cross site scripting, denial of service, deserialization, file disclosure, information leakage, memory leak, out of bounds read, privilege escalation, server-side request forgery, and remote SQL injection vulnerabilities.

tags | advisory, remote, denial of service, vulnerability, code execution, xss, sql injection, memory leak
systems | linux, redhat
advisories | CVE-2018-1000873, CVE-2019-0205, CVE-2019-0210, CVE-2019-10202, CVE-2019-10219, CVE-2019-11777, CVE-2019-12406, CVE-2019-12423, CVE-2019-13990, CVE-2019-14900, CVE-2019-17566, CVE-2019-17638, CVE-2019-19343, CVE-2019-2692, CVE-2019-3773, CVE-2019-3774, CVE-2020-10683, CVE-2020-10740, CVE-2020-11612, CVE-2020-11971, CVE-2020-11972, CVE-2020-11973, CVE-2020-11980, CVE-2020-11989, CVE-2020-11994, CVE-2020-13692, CVE-2020-1393
SHA-256 | 4d8c51d0d7d15381aedd8f056934e518c8d3ae79ede9556857b44d07aaa1f17a
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