Dear Mr ricardo,
We received a security alert from the German Federal Office for Information Security (BSI).
Please see the original report included below for details.
Please investigate and solve the reported issue.
It is not required that you reply to either us or the BSI.
If the issue has been fixed successfully, you should not receive any further notifications.
Additional information is provided with the HOWTOs referenced in the report.
In case of further questions, please contact
certbund@bsi.bund.de and keep the
ticket number of the original report [CB-Report#...] in the subject line.
Do not reply <
reports@reports.cert-bund.de> as this is just the sender address for the
reports and messages sent to this address will not be read.
Kind regards
Abuse team
On 28 Mar 16:17,
reports@reports.cert-bund.de wrote:
> Dear Sir or Madam,
>
> the Portmapper service (portmap, rpcbind) is required for mapping RPC
> requests to a network service. The Portmapper service is needed e.g.
> for mounting network shares using the Network File System (NFS).
> The Portmapper service runs on port 111 tcp/udp.
>
> In addition to being abused for DDoS reflection attacks, the
> Portmapper service can be used by attackers to obtain information
> on the target network like available RPC services or network shares.
>
> Over the past months, systems responding to Portmapper requests from
> anywhere on the Internet have been increasingly abused DDoS reflection
> attacks against third parties.
>
> Affected systems on your network:
>
> Format: ASN | IP | Timestamp (UTC) | RPC response
> 24940 | 195.201.34.000 | 2018-03-27 06:24:23 | 100000 4 111/udp; 100000 3 111/udp; 100000 2 111/udp; 100000 4 111/udp; 100000 3 111/udp; 100000 2 111/udp;
>
> We would like to ask you to check this issue and take appropriate
> steps to secure the Portmapper services on the affected systems or
> notify your customers accordingly.
>
> If you have recently solved the issue but received this notification
> again, please note the timestamp included below. You should not
> receive any further notifications with timestamps after the issue
> has been solved.
>
> Additional information on this notification, advice on how to fix
> reported issues and answers to frequently asked questions:
> <
https://reports.cert-bund.de/en/>
>
> This message is digitally signed using PGP.
> Information on the signature key is available at:
> <
https://reports.cert-bund.de/en/digital-signature>
>
> Please note:
> This is an automatically generated message. Replies to the
> sender address <
reports@reports.cert-bund.de> will NOT be read
> but silently be discarded. In case of questions, please contact
> <
certbund@bsi.bund.de> and keep the ticket number [CB-Report#...]
> of this message in the subject line.
>
> !! Please make sure to consult our HOWTOs and FAQ available at
> !! <
https://reports.cert-bund.de/en/> first.
>
>
>
> Mit freundlichen Gren / Kind regards
> Team CERT-Bund
>
> Bundesamt fr Sicherheit in der Informationstechnik
> Federal Office for Information Security (BSI)
> Referat CK22 - CERT-Bund
> Godesberger Allee 185-189, 53175 Bonn, Germany
