Assessment
Why it matters
CISA lists this vulnerability as known to be exploited; exploitation is confirmed; EPSS is 99.7%; technical severity is CVSS 9.8.
The Java OpenWire protocol marshaller is vulnerable to Remote Code Execution. This vulnerability may allow a remote attacker with network access to either a Java-based OpenWire broker or client to run arbitrary shell commands by manipulating serialized class types in the OpenWire protocol to cause either the client or the broker (respectively) to instantiate any class on the classpath. Users are recommended to upgrade both brokers and clients to version 5.15.16, 5.16.7, 5.17.6, or 5.18.3 which fixes this issue.
Who should care
- Teams operating Activemq, Activemq Legacy Openwire Module, Debian Linux +3 more
- Vulnerability and exposure management teams
- Security operations teams monitoring exploitation activity
Response plan
What I would do
- Confirm whether Activemq, Activemq Legacy Openwire Module, Debian Linux +3 more is present in the environment.
- Identify affected versions and establish whether vulnerable services are exposed or reachable.
- Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
- Review relevant security telemetry for evidence of attempted or successful exploitation.
- Document the remediation decision and track it to verified completion.
Vendor remediation
Patch and remediation links
Use the vendor source below to confirm the correct fixed version, package or mitigation for your affected product.
Technical details
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CWE
- CWE-502
- Affected versions
- Apache Activemq (Start Including: 5.18.0, End Excluding: 5.18.3); Apache Activemq Legacy Openwire Module (Start Including: 5.18.0, End Excluding: 5.18.3); Debian Debian Linux (Version: 11.0); Netapp E-series Santricity Unified Manager (Version: -); Netapp E-series Santricity Web Services Proxy (Version: -); Netapp Santricity Storage Plugin (Version: -)
- Published
- 27 October 2023
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
Signal timeline
- CVE published
- Added to CISA KEV
- Latest EPSS score: 99.7%
- Signal calculated at 88
External references
- Government advisory from www.cisa.gov
- Technical reference from lists.debian.org
- Third-party advisory from seclists.org
- Vendor advisory from activemq.apache.org
- Technical reference from lists.debian.org
- Exploit information from packetstormsecurity.com
- Third-party advisory from security.netapp.com
- Technical reference from www.openwall.com