Overview
Recently, NSFOCUS CERT monitored that Atlassian officially fixed an improper authentication vulnerability in the Atlassian Communication Data Center and Server (CVE-2023-22518). Unauthenticated remote attackers can bypass the authentication of the target system to a certain extent by constructing malicious requests and obtain the authority to take over the server through the backend interface, achieving remote code execution. As the attacker is unable to disclose any system data, it will not affect confidentiality. However, the exploitation of this vulnerability can lead to the emptying of Confluence data, which has an irreversible impact on data integrity. Affected users should take protective measures as soon as possible.
Scope of Impact
- Atlas conflict<7.19.16
- Atlas conflict<8.3.4
- Atlas conflict<8.4.4
- Atlas conflict<8.5.3
- Atlas conflict<8.6.1
Unaffected version
- Atlas conflict>=7.19.16
- Atlas conflict>=<8.3.4
- Atlas conflict>=8.4.4
- Atlas conflict>=8.5.3
- Atlas conflict>=8.6.1
Detection
Users can investigate whether the current Conflict version is within the affected range and whether the current service is affected by this vulnerability.
Mitigation
Official upgrade
At present, the official security version has been released to fix this vulnerability. It is recommended that affected users update the version in a timely manner for protection to ensure the security and stability of the service: https://www.atlassian.com/software/confluence/download-archives
Temporary measures
Users who cannot upgrade can take the following temporary mitigation measures:
1. Backup application data, detailed instructions can be accessed at the following link:
https://confluence.atlassian.com/doc/production-backup-strategy-38797389.html
2. In the absence of any impact on one’s own business, publicly accessible applications (including instances with user authentication) should have limited access to external networks before upgrading or installing patches.
Statement
This advisory is only used to describe a potential risk. NSFOCUS does not provide any commitment or promise on this advisory. NSFOCUS and the author will not bear any liability for any direct and/or indirect consequences and losses caused by transmitting and/or using this advisory. NSFOCUS reserves all the rights to modify and interpret this advisory. Please include this statement paragraph when reproducing or transferring this advisory. Do not modify this advisory, add/delete any information to/from it, or use this advisory for commercial purposes without permission from NSFOCUS.
About NSFOCUS
NSFOCUS, Inc., a global network and cyber security leader, protects enterprises and carriers from advanced cyber attacks. The company’s Intelligent Hybrid Security strategy utilizes both cloud and on-premises security platforms, built on a foundation of real-time global threat intelligence, to provide multi-layered, unified and dynamic protection against advanced cyber attacks.
NSFOCUS works with Fortune Global 500 companies, including four of the world’s five largest financial institutions, organizations in insurance, retail, healthcare, critical infrastructure industries as well as government agencies. NSFOCUS has technology and channel partners in more than 60 countries, is a member of both the Microsoft Active Protections Program (MAPP), and the Cloud Security Alliance (CSA).
A wholly owned subsidiary of NSFOCUS Technologies Group Co., Ltd., the company has operations in the Americas, Europe, the Middle East and Asia Pacific.
