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Finding Confluence servers with Rumble

(updated ), by Pearce Barry
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The U.S. Cyber Command recently reported “mass exploitation” of a code execution vulnerability in Atlassian’s popular Confluence software (CVE-2021-26084). This vulnerability has a CVSS Base score of 9.8 (considered “critical”), requires no authentication for exploitation, and affects many on-prem versions of the product (Atlassian says that Confluence Cloud customers are not affected). Public reports of exploitation are surfacing, including a Confluence instance of the Jenkins project compromised for cryptomining purposes.

Atlassian has provided fixed versions that on-prem Confluence admins should upgrade to as soon as possible, as well as mitigations for those who cannot upgrade immediately. As an aside, there have been some interesting events around the leaking of a private exploit PoC during disclosure with a vulnerable party.

Finding Confluence servers with Rumble #

From the Services Inventory, use the following pre-built query to locate systems in your network that are running Confluence:

_asset.protocol:http AND has:http.head.xConfluenceRequestTime
Find Confluence servers

As always, any prebuilt queries we create are available from our Queries Library. Check out the library for other useful inventory queries.

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Pearce Barry
Written by Pearce Barry

Pearce Barry is a Director of Security Research at runZero. Barry joined runZero in June 2021, working on the Metasploit Project the four years prior. Now, Pearce leads research efforts at runZero, which includes creating and improving fingerprints, adding to protocols, enhancing scanning logic, and writing queries.

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