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PatchSiren cyber security CVE debrief

CVE-2017-12149 Red Hat CVE debrief

CVE-2017-12149 is a Red Hat JBoss Application Server remote code execution vulnerability that CISA added to its Known Exploited Vulnerabilities catalog. The KEV entry indicates known ransomware campaign use and directs defenders to apply updates per vendor instructions. Because it is in KEV, this issue should be treated as actively exploited and prioritized for remediation.

Vendor
Red Hat
Product
JBoss Application Server
CVSS
Unknown
CISA KEV
Listed
Original CVE published
2021-12-10
Original CVE updated
2021-12-10
Advisory published
2021-12-10
Advisory updated
2021-12-10

Who should care

Organizations running Red Hat JBoss Application Server, especially teams responsible for patching, internet-facing application servers, and incident response. Security teams should also care because CISA flags this CVE as known exploited and associated with ransomware activity.

Technical summary

The supplied sources identify the issue as a remote code execution vulnerability in Red Hat JBoss Application Server. The corpus does not provide deeper technical details about the flaw's root cause, affected versions, or exploitation path. What is clear from the official sources is that CISA has marked it as a known exploited vulnerability and recommends updating according to vendor guidance.

Defensive priority

High. CISA inclusion in KEV means defenders should treat this as an actively exploited vulnerability and expedite remediation, especially on exposed or production JBoss Application Server instances.

Recommended defensive actions

  • Identify all Red Hat JBoss Application Server deployments across production, staging, and legacy environments.
  • Verify whether affected instances are exposed to untrusted networks or reachable by external users.
  • Apply vendor-provided updates or mitigations as directed by Red Hat and CISA.
  • If immediate patching is not possible, reduce exposure by restricting network access and isolating affected systems.
  • Monitor logs and security tooling for suspicious activity involving JBoss Application Server hosts.
  • Confirm remediation success with asset inventory and change-management records.

Evidence notes

The supplied corpus includes the CISA KEV record for this CVE, which names the vulnerability as a Red Hat JBoss Application Server remote code execution issue, states 'Apply updates per vendor instructions,' and marks 'Known' ransomware campaign use. The official CVE and NVD links are provided as corroborating references, but the source item itself does not include additional exploit mechanics or version-range details.

Official resources

Publicly listed by CISA in the Known Exploited Vulnerabilities catalog on 2021-12-10. The CVE and source record dates supplied for this debrief are 2021-12-10.