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Xenmobile ServerApplication · Citrix

CVE-2018-18571

CRITICAL · 9.1 CVSS v3.1 Published 2019-06-05
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
100/100
Remediation priority · Urgent
Remotely reachable No privileges Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
An Incorrect Access Control vulnerability has been identified in Citrix XenMobile Server 10.8.0 before Rolling Patch 6 and 10.9.0 before Rolling Patch 3. An attacker can impersonate and take actions on behalf of any Mobile Application Management (MAM) enrolled device.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · high confidence

Citrix XenMobile Server contains an Incorrect Access Control vulnerability where improper validation allows an attacker to impersonate any MAM enrolled device. This authentication bypass enables unauthorized actions on behalf of legitimate enrolled devices.

MitigationApply Citrix XenMobile Server Rolling Patch 6 for version 10.8.0 or Rolling Patch 3 for version 10.9.0 to address the access control vulnerability.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Xenmobile ServerApplication
Affected:= 10.8.0= 10.9.0

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Identify XenMobile Server installation
    Locate the XenMobile Server installation directory or check running services. Common paths include /opt/XenMobile/ or C:\XenMobile\ on Windows. Use 'ps aux | grep -i xenmobile' on Linux or check Windows Services for 'XenMobile Server'.
    Affected if XenMobile Server is not installed or not running, the system is not affected.
  2. Determine installed version
    Check the version file in the installation directory, typically found in /opt/XenMobile/lib/version.properties or via the command 'xmserver -version' if available. Alternatively, access the XenMobile admin console and navigate to Support > Server Version to view the exact build number.
    Affected if The installed version is exactly 10.8.0 or exactly 10.9.0.
  3. Verify MAM enrollment is enabled
    Access the XenMobile admin console and navigate to Settings > Device Management > Enrollment. Confirm that Mobile Application Management (MAM) enrollment is enabled. This can also be checked via the database query: SELECT * FROM enrollment_settings WHERE mam_enabled = true;
    Affected if MAM enrollment is disabled, the specific authentication bypass vector does not apply.
  4. Review device enrollment audit logs
    In the XenMobile admin console, go to Reports > Audit Logs. Filter for enrollment-related events. Look for suspicious device enrollment or device impersonation attempts, especially from IP addresses outside expected ranges or with abnormal enrollment timestamps.
    Affected if Unusual enrollment patterns or failed authentication attempts from multiple device IDs are observed.
  5. Inspect MAM API access logs
    Examine the MAM API access logs, typically found in /opt/XenMobile/server/logs/mam-api.log or equivalent. Search for duplicate device IDs, authentication failures followed by successful requests with different session tokens, or requests with mismatched device identifiers.
    Affected if Authentication anomalies or duplicate device ID submissions are logged.

The environment is affected if Citrix XenMobile Server version 10.8.0 or 10.9.0 is running with MAM enrollment enabled, or if audit/API logs show signs of device impersonation or authentication bypass attempts.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Apply Citrix XenMobile Server Rolling Patch 6 for version 10.8.0 or Rolling Patch 3 for version 10.9.0 to address the access control vulnerability.

Recommended fix Moderate confidence

XenMobile Server 10.8.0 RP6+ or 10.9.0 RP3+

  1. Confirm current XenMobile Server version by accessing the admin console or checking system information
  2. For XenMobile Server 10.8.0: Apply Rolling Patch 6 or later
  3. For XenMobile Server 10.9.0: Apply Rolling Patch 3 or later
  4. After patching, verify the system is functioning correctly
  5. Test that MAM enrollment and device management operations work as expected
  6. Review audit logs to ensure no unauthorized access occurred prior to patching

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Xenmobile Server Scoped from the published advisory
  • Consultation3.0 h
  • Implementation4.0 h
  • Testing3.0 h
  • Review / QA2.0 h
12.0 hours of engineering $2,130
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2018-18571 in production — separate from our analysis above.

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
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  • Version or environment caveats, and links to real fixes
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  • No spam, self-promotion, credentials, or personal data