Tag: CVE-2017-11511
Introduction Welcome to the September 2024 installment of the Sensor Intelligence Series, our monthly summary of vulnerability intelligence based on distributed passive sensor data. Following on from our last month’s analysis, scanning CVE-2017-9841 continues to drop, falling by 10% compared to August, and now down 99.8% from its high-water mark in June of 2024, and…
Read MoreIntroduction Welcome to the August 2024 installment of the Sensor Intelligence Series, our monthly summary of vulnerability intelligence based on distributed passive sensor data. Last month, we observed the scanning for CVE-2017-9841 fell sharply, and this month is no different, with scanning for that vulnerability falling another 79% from July’s rate. Overall, it’s down 97.4%…
Read MoreIntroduction Welcome to the July 2024 installment of the Sensor Intelligence Series, our monthly summary of vulnerability intelligence based on distributed passive sensor data. Last month we observed a massive increase in scanning for CVE-2017-9841 as well as continued increases in scanning for CVE-2023-1389 and scanning for a newly discovered PHP vulnerability – CVE-2024-4577. This…
Read MoreNote the large increase in the number of unique source IPs and source ASNs. Between May and June, 38 different source ASNs dropped from the scanning activity, and 179 were added. This is unusual. While scanners will abandon infrastructure as takedowns happen, or access is revoked, they typically do not make such massive changes without…
Read MoreWho Is Scanning for CVE-2023-1389? Back in April, when we first started tracking CVE-2023-1389, we did an analysis of who was scanning for it, and found that the majority of scanning activity was coming from just two ASNs, AS49870 (Alsycon, a hosting provider out of the Netherlands) and AS47890 (Unmanaged Ltd). Running these analyses again,…
Read MoreIntroduction Last month’s Sensor Intel Series for March 2024 uncovered the explosion in traffic hunting for systems affected by CVE-2023-1389. The flaw which related to TP-Link Archer AX21 Wi-Fi routers has quickly become the new darling of threat actors looking to build out their DDoS botnets. No new signatures have been introduced this month. Instead,…
Read MoreThe majority of the scanning activity is coming from IP addresses assigned to just a handful of ASNs, mostly AS49870 (Alsycon, a hosting provider out of the Netherlands) and AS47890 (Unmanaged Ltd, what looks to be an IT consulting firm based out of the UK). The scanners appear to be using VPS or other resources…
Read MoreConclusions This month we were able to add seven newly observed CVEs to our list of confirmed exploited vulnerabilities: CVE-2012-4940, a directory traversal vulnerability in the Axigen Free Mail Server. CVE-2016-4945, a cross-site scripting flaw in Citrix Netscaler Gateway CVE-2017-11511 and CVE-2017-11512, arbitrary file download flaws at different URIs in the Zoho ManageEngine ServiceDesk tool…
Read MoreWelcome back to the Sensor Intelligence Series, our recurring monthly summary of vulnerability intelligence based on distributed passive sensor data. We’ll start off this month’s analysis with a look at some activity from the August dataset, which demonstrates some of the oddities we occasionally see, and then dig into the changes we saw in September…
Read MoreOverall Scanning Traffic Changes Lest the downward trend shown in Figure 2 makes it seem like overall scanning traffic may be abating, it’s important to note that the volume of scanning we observed has remained relatively constant, at least over the last three months, increasing by approximately 5.1% from August to September, then falling approximately…
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