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Dell BIOS驱动权限提升漏洞(CVE-2021-21551)

在Dell 的BIOS驱动中由于固件更新程序接受IOCTL(输入输出控制)请求,而没有ACL(访问控制列表),即可以被任意用户调用,通过此方法,造成了任意读取/写入漏洞,如果任意读写可以将当前用户提升至更高权限。

PoC:https://github.com/waldo-irc/CVE-2021-21551

Metasploit Exploit:https://github.com/rapid7/metasploit-framework/pull/15190

https://github.com/zeroSteiner/metasploit-framework/blob/feat/cve-2021-21551/modules/exploits/windows/local/cve_2021_21551_dbutil_memmove.rb

use exploit/windows/local/cve_2021_21551_dbutil_memmove
设置SESSION和PAYLOAD
run

ref:

  • https://github.com/rapid7/metasploit-framework/pull/15190
  • https://nvd.nist.gov/vuln/detail/CVE-2021-21551
  • https://github.com/waldo-irc/CVE-2021-21551