Exploited· due 2022-06-109.8criticalCriticalused in ransomware

CVE-2017-12149

Redhat Jboss Enterprise Application Platform

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.

Exploitation status

CISA has confirmed this is being exploited in the wild. That is an observation of real attacks, not a prediction.
It is known to have been used in ransomware campaigns.
US federal civilian agencies are required to remediate it by 2022-06-10. That deadline does not bind private companies, but it is a reasonable benchmark for how urgently CISA views it.

Required action

Apply updates per vendor instructions.

CISA’s wording, unedited.

What the metrics mean

It is reachable over a network, without needing local access.
For an attacker who can reach it, no special conditions are needed to exploit it.
To exploit it, no account is needed.
Beyond that, no action by a user is required.

Scoring

CVSS: 9.8 (v3.1)
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-502
Assigned by: secalert@redhat.com

Dates

Published: 2017-10-04
Last modified: 2026-08-13
Added to KEV: 2021-12-10
Remediation due: 2022-06-10
Sources: CISA KEV, NVD

Affected products

Redhat Jboss Enterprise Application Platformall versions, 5.0.0, 5.0.1, 5.1.0, 5.1.1, 5.1.2, 5.2.0, 5.2.1, 5.2.2

As listed in the NVD configuration data. Not a statement about your estate.