On Thu, Jun 11, 2020 at 04:26:37PM -0700, Niklas wrote:
> I'm curious what this would actually accomplish on a vulnerable server.
> 
> There's no path or executable its trying to find in its iterations. This 
> looks more like an arbitrary shell command meant to act as a scan/test to 
> find vulnerable servers without fully leveraging the exploit.
> 
> If you had the IP it originates from it could tell you a lot.On Jun 10, 2020 
> 8:08 PM, Ryan Kavanagh <r...@debian.org> wrote:

61.148.74.134

Edgar

> >
> > On Wed, Jun 10, 2020 at 10:00:08PM -0500, Edgar Pettijohn wrote: 
> > > Saw this in the maillog today. Any ideas what they are trying to do? 
> > > 
> > >?? 249c054a86af9328 smtp failed-command command="MAIL FROM: <;for i in 0 1 
> > >2 3 4 5 6 7 8 9 a b c d;do read r;done;sh;exit 0;>" result="530 5.5.1 
> > >Invalid command: Must issue an AUTH command first" 
> >
> > My guess is that they're trying to exploit CVE-2020-7247. Search the 
> > advisory text for that command: 
> >
> > https://www.qualys.com/2020/01/28/cve-2020-7247/lpe-rce-opensmtpd.txt 
> >
> > Best, 
> > Ryan 
> >

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