# CVE-2017-12149: JbossAS - RCE

> Live exploitation tracking for CVE-2017-12149 by the CrowdSec Live Exploit Tracker, built from real-world attack data crowdsourced from CrowdSec's global network.

Page: https://tracker.crowdsec.net/cves/CVE-2017-12149

## Key facts

- **Exploitation phase:** Background Noise. Continuous low-level scanning or exploitation attempts are observed, mostly opportunistic and automated.
- **CVSS score:** 9.8
- **Public exploit available:** Yes
- **Affected products:** Red Hat JbossAS
- **Weaknesses:** CWE-502 (Deserialization of Untrusted Data)
- **Tags:** enterprise_software, web_server

## Description

In Jboss Application Server as shipped with Red Hat Enterprise Application Platform 5.2, it was found that the doFilter method in the ReadOnlyAccessFilter of the HTTP Invoker does not restrict classes for which it performs deserialization and thus allowing an attacker to execute arbitrary code via crafted serialized data.

## CrowdSec analysis

[CVE-2017-12149](https://euvd.enisa.europa.eu/vulnerability/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.

CrowdSec network data shows that most actors exploiting CVE-2017-12149 rely on broad, untargeted scans with minimal filtering. The activity is largely automated and opportunistic in nature.
In addition, according to the CrowdSec network, attack volume against CVE-2017-12149 has dipped slightly compared to the previous week. Although still commonly targeted, the decline suggests a cooling-off period. Long-term relevance remains, but attention is waning.

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.

## Timeline

- 2017-10-04: CVE Published. CVE-2017-12149 is published to NVD.
- 2021-12-10: CISA KEV. CVE-2017-12149 is added to the Known Exploited Vulnerabilities catalog by CISA.
- 2022-06-10: CISA Remediation Deadline. Expiration of the CISA remediation deadline as described in [BOD 22-01](https://www.cisa.gov/news-events/directives/bod-22-01-reducing-significant-risk-known-exploited-vulnerabilities).
- 2025-06-12: Rule Released. CrowdSec releases a rule to detect CVE-2017-12149 exploitation attempts against the CrowdSec Network.
- 2025-06-25: CrowdSec First Seen. CrowdSec observes in-the-wild exploitation of CVE-2017-12149 for the first time.

## References

- https://access.redhat.com/errata/RHSA-2018:1607
- https://access.redhat.com/errata/RHSA-2018:1608
- https://bugzilla.redhat.com/show_bug.cgi?id=1486220
- https://github.com/gottburgm/Exploits/tree/master/CVE-2017-12149
- https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2017/CVE-2017-12149.yaml

## Live exploitation data

The [Live Exploit Tracker page](https://tracker.crowdsec.net/cves/CVE-2017-12149) follows observed exploitation activity for CVE-2017-12149. [Request an API key](https://tracker.crowdsec.net/request-api-key) for full access to its exploitation timeline, attacking IP addresses and blocklists.