2024.0.1
CVE-2024-21646 describes a Remote Code Execution (RCE) vulnerability within the Azure uAMQP library, a C library used for AMQP 1.0 communication. An attacker can exploit this flaw by sending specially crafted binary data, resulting in an integer overflow and potential code execution. This vulnerability impacts versions of Azure uAMQP prior to 2024-01-01, and a patch is available in version 2024-01-01.
The impact of CVE-2024-21646 is severe. Successful exploitation allows an attacker to execute arbitrary code on the system utilizing the Azure uAMQP library. This could lead to complete system compromise, data theft, or denial of service. Given the library's use in various AMQP clients, the potential blast radius is significant, affecting any application relying on vulnerable versions of Azure uAMQP. The integer overflow vulnerability is similar in nature to other memory corruption issues that have historically been exploited for RCE, highlighting the potential for rapid exploitation if a public proof-of-concept is released.
CVE-2024-21646 was publicly disclosed on January 9, 2024. Its CRITICAL CVSS score indicates a high probability of exploitation. As of this writing, it is not listed on the CISA KEV catalog, but this could change. The availability of a patch suggests that Microsoft is aware of the potential for exploitation. The absence of a public proof-of-concept does not diminish the risk, as the vulnerability's nature makes it relatively straightforward to exploit.
Applications and systems utilizing vulnerable versions of Azure uAMQP are at risk. This includes systems relying on AMQP for message queuing, integration with cloud services, or other communication protocols. Specifically, organizations using custom AMQP clients built on top of the Azure uAMQP library are particularly vulnerable, as they may not have implemented adequate input validation.
• linux / server:
journalctl -g "uamqp" -u "amqp_client"• c / supply-chain: Examine source code for uAMQP library usage. Look for binary data handling functions with potential integer overflow vulnerabilities. • generic web: Monitor web server logs for unusual AMQP traffic patterns or error messages related to binary data processing.
disclosure
patch
漏洞利用状态
EPSS
2.49% (85% 百分位)
CVSS 向量
The primary mitigation for CVE-2024-21646 is to immediately upgrade to version 2024-01-01 or later. If upgrading is not immediately feasible due to compatibility issues or testing requirements, consider implementing input validation on the binary data received by the AMQP client. This validation should specifically check for potential integer overflows. While not a complete solution, this can reduce the attack surface. Monitor network traffic for unusual binary data patterns indicative of exploitation attempts. After upgrading, confirm the fix by sending a test message containing the crafted binary data that triggers the vulnerability and verifying that it no longer results in an overflow.
将 azure-uamqp-c 库更新到 2024-01-01 或更高版本。这修复了由于接收到构造的二进制数据时发生的整数溢出或内存安全问题导致的远程代码执行漏洞。可以通过从仓库下载最新版本并替换现有库来执行更新。
漏洞分析和关键警报直接发送到您的邮箱。
CVE-2024-21646 is a critical Remote Code Execution vulnerability in the Azure uAMQP library, allowing attackers to execute code through crafted binary data.
You are affected if you are using Azure uAMQP versions prior to 2024-01-01. Check your dependencies and upgrade immediately.
Upgrade to version 2024-01-01 or later. If immediate upgrade is not possible, implement input validation on binary data.
While no active exploitation has been publicly confirmed, the vulnerability's severity and ease of exploitation suggest a high risk of future attacks.
Refer to the Microsoft Security Update Guide for details: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-21646