漏洞公告
近日，安恒信息CERT监测到针对PowerShell远程代码执行漏洞(CVE-2022-41076)的技术细节（称为TabShell）在互联网上公开。经过身份认证的远程攻击者可利用此漏洞绕过沙箱限制在目标机器上执行任意代码。此漏洞影响范围广泛，目前漏洞细节及POC已公开，官方已发布安全版本，建议受影响的用户尽快采取安全措施。
参考链接：
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-41076
一
影响范围
受影响版本：
Windows Server 2012 R2 (Server Core installation)
Windows Server 2012 R2 (Server Core installation)
Windows Server 2012 R2
Windows Server 2012 R2
Windows Server 2012 (Server Core installation)
Windows Server 2012 (Server Core installation)
Windows Server 2012
Windows Server 2012
Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)
Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)
Windows Server 2008 R2 for x64-based Systems Service Pack 1
Windows Server 2008 R2 for x64-based Systems Service Pack 1
Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation)
Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation)
Windows Server 2008 for x64-based Systems Service Pack 2
Windows Server 2008 for x64-based Systems Service Pack 2
Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation)
Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation)
Windows Server 2008 for 32-bit Systems Service Pack 2
Windows Server 2008 for 32-bit Systems Service Pack 2
Windows RT 8.1
Windows 8.1 for x64-based systems
Windows 8.1 for x64-based systems
Windows 8.1 for 32-bit systems
Windows 8.1 for 32-bit systems
Windows 7 for x64-based Systems Service Pack 1
Windows 7 for x64-based Systems Service Pack 1
Windows 7 for 32-bit Systems Service Pack 1
Windows 7 for 32-bit Systems Service Pack 1
Windows Server 2016 (Server Core installation)
Windows Server 2016
Windows 10 Version 1607 for x64-based Systems
Windows 10 Version 1607 for 32-bit Systems
Windows 10 for x64-based Systems
Windows 10 for 32-bit Systems
Windows 10 Version 22H2 for 32-bit Systems
Windows 10 Version 22H2 for ARM64-based Systems
Windows 10 Version 22H2 for x64-based Systems
Windows 11 Version 22H2 for x64-based Systems
Windows 11 Version 22H2 for ARM64-based Systems
Windows 10 Version 21H2 for x64-based Systems
Windows 10 Version 21H2 for ARM64-based Systems
Windows 10 Version 21H2 for 32-bit Systems
Windows 11 version 21H2 for ARM64-based Systems
Windows 11 version 21H2 for x64-based Systems
Windows 10 Version 20H2 for ARM64-based Systems
Windows 10 Version 20H2 for 32-bit Systems
Windows 10 Version 20H2 for x64-based Systems
Windows Server 2022 (Server Core installation)
Windows Server 2022
Windows 10 Version 21H1 for 32-bit Systems
Windows 10 Version 21H1 for ARM64-based Systems
Windows 10 Version 21H1 for x64-based Systems
Windows Server 2019 (Server Core installation)
Windows Server 2019
Windows 10 Version 1809 for ARM64-based Systems
Windows 10 Version 1809 for x64-based Systems
Windows 10 Version 1809 for 32-bit Systems
PowerShell 7.3
PowerShell 7.2
二
漏洞描述
PowerShell是一种功能强大的脚本语言和shell程序框架，PowerShell可在Windows、Linux和macOS上运行。
PowerShell远程代码执行漏洞(CVE-2022-41076):经过身份验证的远程攻击者可以在remote powershell会话中使用TabExpansion cmdlet，结合目录穿越载入任意dll，导致攻击者可以执行原本不能执行的cmdlet，从而在目标机器上执行任意代码。
| 细节是否公开 | POC状态 | EXP状态 | 在野利用 |
| 是 | 已公开 | 已公开 | 未发现 |
三
缓解措施
高危：目前漏洞细节和利用代码已公开，官方已发布新版本修复了此漏洞，建议受影响用户及时升级更新到安全版本。
1、目前官方已发布补丁修复上述漏洞，建议受影响的用户尽快应用补丁。
获取链接：
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-41076
安恒信息CERT
2023年1月
原文始发于微信公众号（安恒信息CERT）：PowerShell远程代码执行漏洞风险提示（CVE-2022-44877）
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