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THE THREAT eSentire is aware of widespread exploitation attempts targeting the recently disclosed ownCloud vulnerability CVE-2023-49103. CVE-2023-49103 (CVSS: 10) is tracked as a disclosure of… READ NOW
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eSentire is The Authority in Managed Detection and Response Services, protecting the critical data and applications of 2000+ organizations in 80+ countries from known and unknown cyber threats. Founded in 2001, the company's mission is to hunt, investigate and stop cyber threats before they become business disrupting events.
Waterloo, ON and GITEX GLOBAL 2023, Dubai, UAE – October 18, 2023 – eSentire, Inc., the Authority in Managed Detection and Response (MDR), today announced that Inspira Enterprise Inc, (Inspira), a… READ NOW
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On November 6th, Atlassian confirmed that threat actors are now actively exploiting a recently disclosed critical Atlassian Confluence vulnerability. The exploited vulnerability, CVE-2023-22518 (CVSS: 10), is tracked as an Improper Authorization vulnerability in Confluence Data Center and Servers. Exploitation of this vulnerability allows an unauthenticated attacker to reset Confluence and create a Confluence instance administrator account.
Atlassian stated that observed attacks resulted in the deployment of ransomware. Multiple security organizations have identified Cerber ransomware following exploitation of CVE-2023-22518 . As exploitation has now been confirmed, it is critical that organizations, using Atlassian Confluence, update to a secure version immediately.
CVE-2023-22518 was initially disclosed on October 31st, 2023. The first signs of exploitation have been traced back to November 5th. All versions of Confluence Data Center and Server are affected by this vulnerability, with the exclusion of Atlassian Cloud sites. Cloud Confluence sites accessed via the “atlassian.net” domain are not impacted.
In known incidents, threat actors exploited CVE-2023-22518 for initial access into victim organizations. This was followed by reconnaissance commands, execution of PowerShell commands, and the download and execution of a script leading to ransomware deployment. At this time, there is no indication that data exfiltration occurs prior to ransomware deployment. There is a high probability that exploitation will be widespread, as threat actors target all vulnerable exposed instances.
According to Atlassian, fraudulently created administrator accounts may perform a variety of actions leading to “a full loss of confidentiality, integrity and availability”. While exploitation has only been observed leading to the deployment of Cerber ransomware, widespread exploitation by other threat actor groups will likely occur in the immediate future.