Normally this will be a script that will download a web shell to the local server allowing the attacker to run arbitrary code on demand. The URL above will run the contents of the HTTP request post body eval(#parameters.data). (Where $HOSTNAME is the host of the target application.) The new, updated rules greatly improved accuracy, reducing the number of false positives, such as the examples above.Ī valid malicious URL targeting a vulnerable Confluence application is shown below: The decline in WAF rule matches in the graph above after 23:00 UTC is due to us releasing improved WAF rules.
Exact knowledge of how to exploit the vulnerability may have been consolidated amongst select attackers and may not have been widespread. The activity above indicates that actors were using scanning tools to try and identify the attack vectors. Attackers are actively scanning for vulnerable applications at time of writing.Īlthough we have seen valid attack payloads since, many payloads that started matching our initial WAF mitigation rules once the advisory was released were not valid against this specific vulnerability. This large spike coincides with the increased awareness of the vulnerability and release of public proof of concepts. Since our mitigation rules were put in place, we have seen a large spike in activity starting from 10:30 UTC - a little more than 10 hours after the new WAF rules were first deployed. We identified requests matching potentially malicious payloads as early as 00:33 UTC, indicating that knowledge of the exploit was realized by some attackers prior to the Atlassian security advisory. Once we learned of the vulnerability, we began reviewing our WAF data to identify activity related to exploitation of the vulnerability. Our observations of exploit attempts in the wild
Once the vulnerability is exploited, attackers can implant additional malicious code such as Behinder a custom webshell called noop.jsp, which replaces the legitimate noop.jsp file located at Confluence root>/confluence/noop.jsp and another open source webshell called Chopper.
What is the impact of this vulnerability?Īccording to Volexity, the vulnerability results in full unauthenticated RCE, allowing an attacker to fully take over the target application.Īctive exploits of this vulnerability leverage command injections using specially crafted strings to load a malicious class file in memory, allowing attackers to subsequently plant a webshell on the target machine that they can interact with.
Our internal security team started reviewing our Confluence instances to ensure Cloudflare itself was not impacted.Our Web Application Firewall (WAF) teams started work on our first mitigation rules that were deployed on at 23:38 UTC for all customers.When we learned about the vulnerability, Cloudflare’s internal teams immediately engaged to ensure all our customers and our own infrastructure were protected: This post covers our current analysis of this vulnerability. To test it out, answer the questions in Preview mode, and then choose Submit.On at 20:00 UTC Atlassian released a Security Advisory relating to a remote code execution (RCE) vulnerability affecting Confluence Server and Confluence Data Center products. Select Preview to see how your form will look on a Computer or Mobile device. Here just goes the work of your creative mind and imagination. Highlight a word or words, then select any of the following: Bold, Italic, Underline, Font color, Font size, Numbering, or Bullets. Select More question types for Ranking, Likert, File upload, or Net Promoter Score question types.įormatting your text is possible too. Such options as Choice, Text, Rating, or Date are available. Descriptions can cover up to 1,000 characters.Ĭlick on + Add new to place and specify a new question. Remember that there are only 90 characters available. Title it and add a description if needed. Sign in to MS Forms with your Microsoft 365 credentials or Microsoft account.Ĭlick on + New Form. Do you know how to create surveys, quizzes, and polls in MS Forms? Here is a brief and easy guide for the ones who are new to this tool.