Emerson Rosemount X-STREAM
Monitor7.5ICS-CERT ICSA-20-352-01Dec 17, 2020
Attack VectorNetwork
Auth RequiredNone
ComplexityLow
User InteractionNone needed
Summary
A vulnerability in Emerson Rosemount X-STREAM enhanced analyzers (models XEGK, XEXF, XEGP, XEFD) allows an attacker to download files and obtain sensitive information through a specially crafted URL. The vulnerability requires network access but no authentication or user interaction. Affected models include all revisions across these product lines.
What this means
What could happen
An attacker could access sensitive configuration files, calibration data, or operational parameters from X-STREAM analyzers, potentially revealing process information or enabling configuration tampering. This could affect process monitoring accuracy or enable further attacks on connected systems.
Who's at risk
Water utilities, refineries, and chemical plants using Emerson Rosemount X-STREAM analyzers for process monitoring (gas, liquid, density analyzers in models XEGK, XEXF, XEGP, XEFD). Primary concern is facilities where analyzer configuration and calibration data contain sensitive process or security information.
How it could be exploited
An attacker with network access to the X-STREAM device crafts a malicious URL targeting the device's web interface or management port. The specially crafted request exploits the file download vulnerability to retrieve files without authentication, allowing the attacker to exfiltrate sensitive data from the analyzer's local storage.
Prerequisites
- Network access to the X-STREAM device (typically port 80, 443, or management interface)
- Device must be reachable from the attacker's network location
- No credentials required
remotely exploitableno authentication requiredlow complexityno patch availableaffects process monitoring systems
Exploitability
Low exploit probability (EPSS 0.2%)
Affected products (4)
4 EOL
ProductAffected VersionsFix Status
X-STREAM enhanced XEGK: all revisionsAll versionsNo fix (EOL)
X-STREAM enhanced XEXF: all revisionsAll versionsNo fix (EOL)
X-STREAM enhanced XEGP: all revisionsAll versionsNo fix (EOL)
X-STREAM enhanced XEFD: all revisionsAll versionsNo fix (EOL)
Remediation & Mitigation
0/4
Do now
0/1WORKAROUNDRestrict network access to X-STREAM devices using firewall rules; only allow connections from authorized engineering workstations and process control systems
Schedule — requires maintenance window
0/1Patching may require device reboot — plan for process interruption
HOTFIXContact Emerson TechSupport.Hasselroth@emerson.com to obtain and deploy the firmware update that addresses this vulnerability
Mitigations - no patch available
0/2The following products have reached End of Life with no planned fix: X-STREAM enhanced XEGK: all revisions, X-STREAM enhanced XEXF: all revisions, X-STREAM enhanced XEGP: all revisions, X-STREAM enhanced XEFD: all revisions. Apply the following compensating controls:
HARDENINGSegment X-STREAM analyzers behind a protected network boundary; isolate from the Internet and business network using industrial demilitarized zone (DMZ) or network switches
HARDENINGIf remote access to X-STREAM devices is required, use a VPN with current patches and restrict access to authorized personnel only
CVEs (1)
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