Critical vulnerabilities affect almost all Atlassian applications - updates urgently needed
by Tina Siering
The reports about critical security vulnerabilities in Atlassian products do not stop. The Australian software company is currently warning about three serious vulnerabilities in numerous of its applications and services.
The vendor has already released updates and strongly advises installing the latest software version to close the vulnerabilities. Virtually all Atlassian solutions are affected by the two vulnerabilities mentioned above:
Another vulnerability, named CVE-2022-26138, affects the Atlassian app "Questions For Confluence": when the app is activated on the Confluence Server or Data Center, it automatically creates a Confluence user account with the username "disabledsystemuser".
This account is actually intended to help administrators migrate data between the app and the Confluence Cloud. The problem: The "disabledsystemuser" account has a hardcoded password that has already been published on Twitter. Attackers with knowledge of the password can log into Confluence and access all pages that the confluence-users user group has access to.
Confluence versions 2.7.34, 2.7.35, and 3.0.2 are affected by this vulnerability, and patches are available in versions 2.7.38 and 3.0.5. Again, the vendor software update should be installed immediately.
If this is not possible in a timely manner, it is recommended to delete or deactivate the account "disabledsystemuser" in the meantime until the software update is performed.
To check whether the user "disabledsystemuser" has already been used in the past, please follow the link below: https://confluence.atlassian.com/confkb/how-to-get-a-list-of-users-with-their-last-logon-times-985499701.html
The user has certainly not been used if "Last authentication time" is Null.
Allgeier secion customers with an active managed service contract for ACD will of course be informed immediately about malicious communication on their systems, currently we are actively checking for the IoCs in all affected Atlassian products.
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