Atlassian.Confluence.CVE-2021-26084.Remote.Code.Execution

Description

This indicates an attack attempt to exploit a Remote Code Execution Vulnerability in Atlassian Confluence.
The vulnerability is due to insufficient input validation while handling a malicious request. A remote attacker may be able to exploit this to execute arbitrary code via a crafted HTTP request.

Outbreak Alert

Joint Cybersecurity Advisory (CSA) has released the top Common Vulnerabilities and Exposures (CVEs) used since 2020 by Peoples Republic of China (PRC) state-sponsored cyber actors as assessed by the National Security Agency (NSA), Cybersecurity and Infrastructure Security Agency (CISA), and Federal Bureau of Investigation (FBI). Previously, FortiGuard labs has already published various Outbreaks Alerts included in the released CISA's advisory such as: Apache Log4j, Hikvision Webserver Vulnerability, Atlassian Confluence OGNL RCE Vulnerability, Microsoft Exchange Server RCE Vulnerabilities etc. See the full list at: https://www.fortiguard.com/outbreak-alert Links to dedicated reports on each published outbreak by FortiGuard Labs are added to Additional Resources section below.

View the full Outbreak Alert Report

FortiGuard Labs continues to observe attack attempts exploiting the vulnerabilities highlighted in the recent CISA advisory about Russian military cyber actors. These actors are targeting U.S. and global critical infrastructure to conduct espionage, steal data, and compromise or destroy sensitive information.

View the full Outbreak Alert Report

Affected Products

atlassian:confluence prior to 6.13.23
atlassian:confluence 6.14.0 to 7.4.11
atlassian:confluence 7.5.0 to 7.11.6
atlassian:confluence 7.12.0 to 7.12.5
atlassian:data_center prior to 6.13.23
atlassian:data_center 6.14.0 to 7.4.11
atlassian:data_center 7.5.0 to 7.11.6
atlassian:data_center 7.12.0 to 7.12.5

Impact

System Compromise: Remote attackers can gain control of vulnerable systems.

Recommended Actions

Apply the most recent upgrade or patch from the vendor
https://jira.atlassian.com/browse/CONFSERVER-67940

References