成因:
该漏洞源于Win32k组件没有正确的处理内存中的对象
部分版本Windows系统win32k.sys组件的NtUserSetImeInfoEx()系统服务函数内部未验证内核对象中的空指针对象,普通应用程序可利用该空指针漏洞以内核权限执行任意代码。
受影响的版本:
Windows 7 for 32-bit Systems Service Pack 1
Windows 7 for x64-based Systems Service Pack 1
Windows Server 2008 for 32-bit Systems Service Pack 2
Windows Server 2008 for 32-bit Systems Service Pack 2
Windows Server 2008 for Itanium-Based Systems ServicePack 2
Windows Server 2008 for x64-based Systems Service Pack 2
Windows Server 2008 for x64-based Systems Service Pack 2
Windows Server 2008 R2 for Itanium-Based Systems ServicePack 1
Windows Server 2008 R2 for x64-based Systems ServicePack 1
Windows Server 2008 R2 for x64-based Systems ServicePack 1
提权方式:
通过webshell获得一个低权限用户后上传CVE-2018-8120.exe到文件夹
利用工具下载:
https://github.com/alpha1ab/CVE-2018-8120
参考资料:
https://www.freebuf.com/vuls/174183.html