News & Insights

Topic: Scans

Shadowserver Special Report – Exchange Scanning #5

March 24, 2021
A new one-off Special Report covering efforts to identify additional vulnerable and compromised Microsoft Exchange servers and associated common web shell that are configured to use DNS based virtual hosting, rather than direct IPv4 /0 scanning for default web sites, containing data for the period 2021-03-16 to 2021-03-22.

Shadowserver Special Reports – Exchange Scanning #4

March 15, 2021
Another internet wide scan based one-off Special Report identifying 59218 potentially vulnerable Microsoft Exchange Servers on 2021-03-14 courtesy of Kryptoslogic, with a comparison of the degree of overlap in coverage between this data set and our previous one-off Special Report that was just released. If your mail servers appear in either report - please patch immediately.

Shadowserver Special Reports – Exchange Scanning #3

March 15, 2021
Another one-off Special Report identifying 73608 potentially vulnerable Microsoft Exchange Servers during the period 2021-03-13 and 2021-03-14, which corresponds to 63115 unique IP addresses in 211 countries. These exposed systems remain at very high risk and need patching immediately.

Shadowserver Special Reports – Exchange Scanning #2

March 12, 2021
Another one off Shadowserver Special Report, this time in partnership with Kryptoslogic, provides critical information about compromised Microsoft Exchange Servers with exposed public web shells that were likely exploited using CVE-2021-26855, CVE-2021-26857, CVE-2021-26858 and CVE-2021-27065. Please remediate and patch/rebuild urgently!

Shadowserver Special Reports – Exchange Scanning #1

March 11, 2021
Shadowserver one-off Special Reports are for reporting security events outside our usual 24-hour reporting window. Our second Special Report covers identification Microsoft Exchange Servers potentially vulnerable to CVE-2021-26855, CVE-2021-26857, CVE-2021-26858 and CVE-2021-27065 by scanning with DIVD after patches were released.

Scanning for Accessible MS-RDPEUDP services

January 25, 2021
We have started daily IPv4 /0 scanning for exposed MS-RDPEUDP instances on port 3389/UDP. Aside from the usual risks associated with exposing RDP services to the Internet, this UDP extension of the popular RDP services has been found to be susceptible to amplification DDoS abuse with an amplification factor of over 84. Over 12 000 instances of MS-RDPEUDP have been found to be accessible on the IPv4 Internet.

Accessible Radmin Report - Exposed Radmin Services on the Internet

July 7, 2020
We have recently enabled a new IPv4 Internet-wide scan and report for accessible Radmin services on port 4899/TCP. Radmin is a remote access software product commonly in use today. Our daily scans uncover around 50,000 accessible Radmin services on port 4899/TCP. While Radmin is in general considered a secure mechanism for remote access, care should be taken as with all similar types of services to ensure no misconfiguration has taken place.

Accessible CoAP Report - Exposed Constrained Application Protocol Services on the Internet

June 24, 2020
We have enabled a new scan for exposed CoAP (Constrained Application Protocol) devices on port 5683/UDP. The scan has uncovered around 460 000 exposed CoAP services that can be potentially abused for CoAP amplification DDoS attacks. These services may also leak information or expose other vulnerabilities. This is the third IoT scan implemented as part of the EU CEF VARIoT project.

Open IPP Report - Exposed Printer Devices on the Internet

June 10, 2020
We have enabled a new scan dedicated to finding open IPP (Internet Printing Protocol) devices exposed on port 631/TCP. The roughly 80,000 devices uncovered as a result of the scan have connected to the Internet without adequate access controls or authorization mechanisms in place. This could allow for a potential range of different types of attacks, from information disclosure and service disruption/tampering, to, in some cases, remote command execution. Results of the scan are collected in the new Open IPP report. This is the second scan enabled under the EU CEF VARIoT project.

The Shadowserver Foundation Threat Report: A Spotlight on Africa

April 30, 2020
This blog is the first in a series in which we will take a look at different world regions in order to demonstrate what taking a more holistic view of our data can reveal - starting with the African continent. The derived insight helps us better drive our outreach activities and hopefully allows National CSIRTs in the region, as well as numerous other authorities/partners and private enterprises, to enhance their incident response coordination and share information from our public benefit victim remediation network reports with local communities in a more effective manner.