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Netscaler Sd WanApplication · Citrix

CVE-2018-17445

CRITICAL · 9.8 CVSS v3.0 Published 2018-10-23
Fix available
A fix is available. Upgrade to after 10.0.4 or later.
See remediation →
100/100
Remediation priority · Urgent
Remotely reachable No privileges Zero-click Patch available

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
A Command Injection issue was discovered in Citrix SD-WAN 10.1.0 and NetScaler SD-WAN 9.3.x before 9.3.6 and 10.0.x before 10.0.4.

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
How this class of weakness works · CWE-77

User input reaches a command interpreter without being fully separated from the command itself, so an attacker can append instructions of their own. Because those run with the application's privileges, it frequently means control of the host. The lasting fix is to avoid constructing commands from input — call APIs directly and pass arguments as data, never as concatenated strings.

General guidance for the command injection class — the official description and references above are authoritative for this specific CVE. Want a bespoke review and a reviewed fix? Ask our team →

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
Netscaler Sd WanApplication
Affected:>= 9.3.0, <= 9.3.6>= 10.0.0, <= 10.0.4
Sd WanApplication
Affected:= 10.1.0

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
High

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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
Upgrade available Upgrade to a release after 10.0.4
Vendor patch support.citrix.com →
Recommended fix High confidence

NetScaler SD-WAN 9.3.6 (or later), 10.0.4 (or later), or 10.1.1 (or later) depending on your product line

  1. 1. Identify the currently installed Citrix SD-WAN version by checking the device management interface or running 'show version' command
  2. 2. For NetScaler SD-WAN 9.3.x users: Upgrade to version 9.3.6 or later
  3. 3. For NetScaler SD-WAN 10.0.x users: Upgrade to version 10.0.4 or later
  4. 4. For SD-WAN 10.1.0 users: Upgrade to the latest 10.1.x version (10.1.1 or later) that includes the security patch
  5. 5. After upgrade, verify the system is operational and the vulnerability is remediated by confirming the new version is running
  6. 6. Review Citrix support article CTX236992 for any additional post-upgrade configuration requirements
Caveat Review release notes for any configuration or behavioral changes between your current version and the target upgrade version before deploying in production

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

We can identify the exact fixed release, upgrade, and verify it in staging — typical engagement from $3,550. Get the upgrade done

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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-2018-17445 in production — separate from our analysis above.

No notes yet

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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
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
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