Vulnerability record

CVE-2019-19781

Citrix ADC, Gateway, and SD-WAN WANOP Appliance Code Execution Vulnerability

Severity: CriticalExploitation: Exploitation confirmedCISA KEV Used by ransomware
What should I do?

This vulnerability is in the CISA Known Exploited Vulnerabilities catalog: attackers are using it. If you run Application Delivery Controller (ADC), Gateway, and SD-WAN WANOP Appliance, fix it now.

CISA required action: Apply updates per vendor instructions.

US federal civilian agencies must remediate by May 3, 2022.

Patch status

No official fix confirmed yet

Until a fix ships, follow the vendor's mitigations and CISA's required action, limit exposure of affected systems, and watch this record for a patch.

Description

An issue was discovered in Citrix Application Delivery Controller (ADC) and Gateway 10.5, 11.1, 12.0, 12.1, and 13.0. They allow Directory Traversal.

Source: NIST National Vulnerability Database. Official vulnerability data, reproduced as published.

Affected products

Products affected by this vulnerability, with versions and the source of each entry
ProductVendorSource
Application Delivery Controller (ADC), Gateway, and SD-WAN WANOP ApplianceCitrix (Cloud Software Group)KEV

Sources: KEV = CISA Known Exploited Vulnerabilities catalog. Version details have not been published yet.

Intelligence timeline

Developments from the last 30 days, newest first.

  1. CVSS scoredUpdateKEV

    CVE-2019-19781 scored CVSS 9.8: Citrix Application Delivery Controller (ADC), Gateway, and SD-WAN WANOP Appliance, Citrix ADC, Gateway, and SD-WAN WANOP Appliance Code Execution Vulnerability

    CISA lists this as exploited in the wild and known to be used in ransomware campaigns. Unpatched Application Delivery Controller (ADC), Gateway, and SD-WAN WANOP Appliance systems are exposed to active attacks now.

    Basis: NIST National Vulnerability Database

1 earlier event is available with a subscription. See plans.

Coverage

We have not published a story about this vulnerability yet.

References

  • nvd.nist.gov https://nvd.nist.gov/vuln/detail/CVE-2019-19781
  • packetstormsecurity.com http://packetstormsecurity.com/files/155904/Citrix-Application-Delivery-Controller-Gateway-Remote-Code-Executi…
  • packetstormsecurity.com http://packetstormsecurity.com/files/155905/Citrix-Application-Delivery-Controller-Gateway-Remote-Code-Executi…
  • packetstormsecurity.com http://packetstormsecurity.com/files/155930/Citrix-Application-Delivery-Controller-Gateway-10.5-Remote-Code-Ex…
  • packetstormsecurity.com http://packetstormsecurity.com/files/155947/Citrix-ADC-NetScaler-Directory-Traversal-Remote-Code-Execution.htm…
  • packetstormsecurity.com http://packetstormsecurity.com/files/155972/Citrix-ADC-Gateway-Path-Traversal.html
  • badpackets.net https://badpackets.net/over-25000-citrix-netscaler-endpoints-vulnerable-to-cve-2019-19781/
  • forms.gle https://forms.gle/eDf3DXZAv96oosfj6
  • support.citrix.com https://support.citrix.com/article/CTX267027
  • twitter.com https://twitter.com/bad_packets/status/1215431625766424576
  • kb.cert.org https://www.kb.cert.org/vuls/id/619785
  • cisa.gov https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-19781