Connect with us

Hi, what are you looking for?



Telemetry Report Shows Patch Status of High-Profile Vulnerabilities

How quickly are high risk vulnerabilities patched?

How quickly are high risk vulnerabilities patched?

A record number of new security vulnerabilities (18,352) were reported in 2020. This year, the number is likely to be higher (13,002 by September 1). The problem with a zero-day vulnerability is that it remains a zero-day until it is patched by both the vendor and the user.

Twenty percent of this year’s new vulnerabilities were given a ‘high severity’ scoring by NVD. Given the speed with which malicious actors can begin to exploit these vulnerabilities, researchers at Trustwave decided to investigate and report (PDF) on how quickly industry patches them.

The researchers selected a range of high profile vulnerabilities, and used Shodan to detect instances of the vulnerabilities still extant on the internet. They conducted searches on July22, August 16, and August 31 to detect the progress of patching.

Seven vulnerability disclosures were selected for the analysis: MS Exchange Server (ProxyShell and ProxyToken); Apache Tomcat (HTTP request smuggling and QNAP NAS command injection); VMware vCenter (multiple vulnerabilities); Pulse Connect (authentication bypass); F5 BIG-IP (RCE vulnerability); MS Exchange Server (ProxyLogon); and Oracle WebLogic Server (RCE).

The results are not encouraging. For example, the ProxyShell and ProxyToken vulnerabilities were patched by Microsoft in April and May, and disclosed in July. “As of August 31, 2021,” say the researchers, “facet analysis on Shodan reports ~45K instances verified were vulnerable to ProxyShell.” That is 21.17% of MS Exchange Servers remained unpatched.

The pattern is similar across the other analyzed vulnerabilities. More than half of all Apache Tomcat vulnerabilities remained unpatched at August 31, 2021; and more than20% of Pulse Connect instances were unpatched. The F5 and MS ProxyLogon vulnerabilities are both down to around 5% of instances, but have both only reduced by around 2% since July 22, 2021.

The Oracle WebLogic vulnerability is a bit more complex. It was patched by Oracle in January 2021. However, by July 22, 2021, Shodan showed that 72% of Internet-facing WebLogic instances had not been updated to the new version. But based on actual application exploitability, this number fell to 5.6% by the end of August. Worryingly, this is slightly higher than the 5.34% detected on August 16, 2021.

Advertisement. Scroll to continue reading.

There are many reasons why companies fail to patch their systems quickly. However, the point to note here is that cybercriminals use the same research techniques as those used Trustwave; that is, Shodan and other internet scanning tools. Every single vulnerable instance found by Trustwave in this exercise is also known to the criminal fraternity. Those companies that are yet unexploited probably remain so simply because the attackers have cherry-picked other targets to attack first.

“It is imperative,” say the researchers, “that organizations proactively identify vulnerabilities and patch them.” This is complicated by organizations not always knowing the entirety of their IT estate – it is not unknown for servers to become unused and forgotten (and therefore unpatched), yet remain connected to and accessible from the internet. Similarly, the ease with which new servers are spun up in the cloud, used for a single task (such as testing) and then abandoned and forgotten, adds to a company’s invisible IT estate. These effectively unknown systems will still be found by Shodan and potentially exploited by criminals to gain an undetected foothold into the network.

“It is crucial to have an up-to-date inventory of assets, particularly for targets accessible via the Internet,” says Trustwave. “Exploits to critical vulnerabilities are usually available anywhere from less than a day to a month, and it is important for organizations to continuously monitor, track and update assets with the latest security updates.”

Related: NIST and Microsoft Partner to Improve Enterprise Patching Strategies

Related: Attacks Exploiting VMware vSphere Flaw Spotted One Week After Patching

Related: Did Microsoft Botch the PrintNightmare Patch?

Related: Microsoft Ships Massive Security Patch Bundle

Written By

Kevin Townsend is a Senior Contributor at SecurityWeek. He has been writing about high tech issues since before the birth of Microsoft. For the last 15 years he has specialized in information security; and has had many thousands of articles published in dozens of different magazines – from The Times and the Financial Times to current and long-gone computer magazines.

Click to comment

Daily Briefing Newsletter

Subscribe to the SecurityWeek Email Briefing to stay informed on the latest threats, trends, and technology, along with insightful columns from industry experts.

Join security experts as they discuss ZTNA’s untapped potential to both reduce cyber risk and empower the business.


Join Microsoft and Finite State for a webinar that will introduce a new strategy for securing the software supply chain.


Expert Insights

Related Content


Less than a week after announcing that it would suspended service indefinitely due to a conflict with an (at the time) unnamed security researcher...

Data Breaches

OpenAI has confirmed a ChatGPT data breach on the same day a security firm reported seeing the use of a component affected by an...

Risk Management

The supply chain threat is directly linked to attack surface management, but the supply chain must be known and understood before it can be...

IoT Security

A group of seven security researchers have discovered numerous vulnerabilities in vehicles from 16 car makers, including bugs that allowed them to control car...


The latest Chrome update brings patches for eight vulnerabilities, including seven reported by external researchers.


Patch Tuesday: Microsoft warns vulnerability (CVE-2023-23397) could lead to exploitation before an email is viewed in the Preview Pane.


A researcher at IOActive discovered that home security systems from SimpliSafe are plagued by a vulnerability that allows tech savvy burglars to remotely disable...


Patch Tuesday: Microsoft calls attention to a series of zero-day remote code execution attacks hitting its Office productivity suite.