JbossAS - RCE (CVE-2017-12149)

CVE-2017-12149, a vulnerability in JbossAS shipped with Red Hat Enterprise Application Platform 5.2 allows remote code execution due to unsafe deserialization in the ReadOnlyAccessFilter's doFilter method. Attackers can exploit this flaw by sending crafted serialized data, potentially leading to full system compromise and unauthorized execution of arbitrary code on the affected server.

CrowdSec has been tracking this vulnerability and its exploits since 12th of June 2025.

According to CrowdSec data, while opportunistic exploitation dominates, a portion of threat actors trying to exploit CVE-2017-12149 apply basic targeting methods such as port or service detection. This indicates emerging patterns of selective targeting. CrowdSec data also reveals a clear uptick in attacks involving CVE-2017-12149 over the past week. Activity is above the usual baseline, suggesting growing attention from attackers. This may reflect rising awareness, recent exploit releases, or expanded targeting efforts.

Attackers exploit JBoss deserialization vulnerabilities by sending crafted POST requests to endpoints like /invoker/readonly, /invoker/jmxinvokerservlet/, and /invoker/ejbinvokerservlet/ to achieve remote code execution.