CVE-2023-6548: Citrix NetScaler ADC and NetScaler Gateway Code Injection Vulnerability

CVE-2023-6548 · Severity: critical · CVSS 8.8 · Exploited in the wild · Published 2024-01-17

A code injection vulnerability in Citrix NetScaler ADC and NetScaler Gateway allows authenticated users with low privileges to perform remote code execution on the management interface. Exploitation requires access to the NetScaler IP (NSIP), Cluster IP (CLIP), or Subnet IP (SNIP) with management interface access.

Technologies: Citrix NetScaler ADC, Citrix NetScaler Gateway. Vendors: Citrix.

Quick answers

Is CVE-2023-6548 exploited in the wild?
Yes. CVE-2023-6548 is known to be exploited in the wild, first recorded on 17 January 2024. Treat it as urgent.
How severe is CVE-2023-6548?
Critical severity, with a CVSS score of 8.8, published 17 January 2024.
Which products and versions are affected?
Citrix NetScaler ADC 12.1 before 12.1-55.302, 13.0 before 13.0-92.21, 13.1 before 13.1-51.15, 14.1 before 14.1-12.35; Citrix NetScaler Gateway 13.0 before 13.0-92.21, 13.1 before 13.1-51.15, 14.1 before 14.1-12.35.
Is there a fix for CVE-2023-6548?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2023-6548 attacked?
It is attacked over the network or from the adjacent network, in a network appliance.
Am I affected by CVE-2023-6548?
Check whether you run Citrix NetScaler ADC or Citrix NetScaler Gateway. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Affected products

  • Citrix NetScaler ADC 12.1 before 12.1-55.302, 13.0 before 13.0-92.21, 13.1 before 13.1-51.15, 14.1 before 14.1-12.35
  • Citrix NetScaler Gateway 13.0 before 13.0-92.21, 13.1 before 13.1-51.15, 14.1 before 14.1-12.35

Timeline

  • 2024-01-17: disclosed
  • 2024-01-17: advisory: Citrix security bulletin CTX584986 published
  • 2024-01-17: kev added: Added to CISA Known Exploited Vulnerabilities catalog
  • 2024-01-17: exploited: Reported as exploited in the wild at time of disclosure

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