CVE-2021-26118

2021-02-1115:41:47

redhat.com

access.redhat.com

amq 7 broker

openwire protocol

permissions checks

unprivileged user

queues

integrity

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

NONE

AV:N/AC:L/Au:N/C:N/I:P/A:N

CVSS3

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

EPSS

0.001

Percentile

50.5%

JSON

A flaw was found in AMQ 7 broker, where it allows users using the OpenWire protocol to bypass the usual permissions checks. This flaw allows an unprivileged user to create queues without verifying the role. The highest threat from this vulnerability is to integrity.

Mitigation

If you are not using the openwire protocol, it can be disabled by removing it from the list of accepted protocols in the broker.xml

xml  
&lt;acceptor name="artemis"&gt;tcp://0.0.0.0:61616?tcpSendBufferSize=1048576;tcpReceiveBufferSize=1048576;amqpMinLargeMessageSize=102400;protocols=CORE,AMQP,STOMP,HORNETQ,MQTT;useEpoll=true;amqpCredits=1000;amqpLowCredits=300;amqpDuplicateDetection=true&lt;/acceptor&gt;