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Organizations Warned of Important Confluence Flaw as Exploitation Continues

By Eduard Kovacs on August 01, 2022

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The US Cybersecurity and Infrastructure Safety Company (CISA) has instructed authorities organizations — and suggested non-public sector corporations — to handle a lately disclosed Confluence vulnerability that has been exploited in assaults.

The important vulnerability, tracked as CVE-2022-26138, is expounded to the existence of an account named ‘disabledsystemuser’ within the Questions for Confluence app, which is designed to assist admins migrate information from the app to Confluence Cloud. The issue is that this account is created with a hardcoded password and is added to the ‘confluence-users’ group, which permits viewing and modifying non-restricted pages in Confluence by default.

A distant, unauthenticated attacker can reap the benefits of the account to log into Confluence and entry any web page the consumer group has entry to.

Atlassian printed its preliminary advisory on July 20 and the following day it knowledgeable prospects that somebody had made the hardcoded password public on Twitter, and stated it anticipated to see in-the-wild exploitation consequently.

Exploitation makes an attempt have been seen by Rapid7, the Shadowserver Basis and risk intelligence firm GreyNoise. GreyNoise information reveals exploitation makes an attempt beginning on July 22 and spiking on July 25. The agency continues to see assaults coming from as much as a dozen distinctive IP addresses on daily basis. Proof-of-concept (PoC) exploits are additionally being publicly launched.

No data has been made accessible on who’s making an attempt to use the vulnerability and what they’re attempting to attain. It’s not unusual for risk actors to focus on Confluence flaws of their assaults, together with to ship ransomware and different malware.

CISA has instructed authorities businesses to take steps to patch or mitigate CVE-2022-26138 by August 19.

Atlassian has additionally up to date its advisory to tell prospects about energetic exploitation of the vulnerability. The corporate has suggested customers to replace the Questions for Confluence app — the newest model not creates the problematic account — and to manually disable or take away the ‘disabledsystemuser’ account. The seller famous that uninstalling the app doesn’t mechanically take away the account.

In a July 30 replace to its preliminary advisory, Atlassian identified that the ‘disabledsystemuser’ account is configured to ship e-mail notifications to ‘dontdeletethisuser(at)e-mail.com’, an deal with that the seller doesn’t management.

“If this vulnerability has not been remediated […], an affected occasion configured to ship notifications will e-mail that deal with. One instance of an e-mail notification is Really helpful Updates Notifications, which accommodates a report of the highest pages from Confluence areas the consumer has permissions to view. Atlassian is actively working with the service supplier for the third get together e-mail deal with to analyze and shut the account,” the corporate stated.

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