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Versions of the Amazon AWS Apache Log4j hotpatch package before log4j-cve-2021-44228-hotpatch-1.3.5 are affected by a race condition that could lead to a local privilege escalation. This Hotpatch package is not a replacement for updating to a log4j version that mitigates CVE-2021-44228 or CVE-2021-45046; it provides a temporary mitigation to CVE-2021-44228 by hotpatching the local Java virtual machines. To do so, it iterates through all running Java processes, performs several checks, and executes the Java virtual machine with the same permissions and capabilities as the running process to load the hotpatch. A local user could cause the hotpatch script to execute a binary with elevated privileges by running a custom java process that performs exec() of an SUID binary after the hotpatch has observed the process path and before it has observed its effective user ID.

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

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Amazon AWS 竞争条件问题漏洞

Amazon AWS是美国亚马逊（Amazon）公司的一款云计算平台，向个人、企业和政府提供一系列包括信息技术基础架构和应用的服务，如存储、数据库、计算、机器学习等等。 Amazon AWS Apache log4j-cve-2021-44228-hotpatch-1.3.5 之前版本存在安全漏洞，该漏洞源于应用存在本地竞争条件问题。本地攻击者利用该漏洞可以通过运行自定义 java 进程来使 hotpatch 脚本以提升的权限执行二进制文件.

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