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.

CVE-2019-19781

What Customers Should Do
Exploits of this issue on unmitigated appliances have been observed in the wild. Citrix strongly urges affected customers to immediately upgrade to a fixed build OR apply the provided mitigation which applies equally to Citrix ADC, Citrix Gateway and Citrix SD-WAN WANOP deployments. Customers who have chosen to immediately apply the mitigation should then upgrade all of their vulnerable appliances to a fixed build of the appliance at their earliest schedule. Subscribe to bulletin alerts at https://support.citrix.com/user/alerts to be notified when the new fixes are available.

The following knowledge base article contains the steps to deploy a responder policy to mitigate the issue in the interim until the system has been updated to a fixed build: CTX267679 - https://support.citrix.com/article/CTX267679

What Customers Should Do
Exploits of this issue on unmitigated appliances have been observed in the wild. Citrix strongly urges affected customers to immediately upgrade to a fixed build OR apply the provided mitigation which applies equally to Citrix ADC, Citrix Gateway and Citrix SD-WAN WANOP deployments. Customers who have chosen to immediately apply the mitigation should then upgrade all of their vulnerable appliances to a fixed build of the appliance at their earliest schedule. Subscribe to bulletin alerts at <a href="https://support.citrix.com/user/alerts">https://support.citrix.com/user/alerts</a> to be notified when the new fixes are available.
The following knowledge base article contains the steps to deploy a responder policy to mitigate the issue in the interim until the system has been updated to a fixed build: CTX267679 - <a href="https://support.citrix.com/article/CTX267679">https://support.citrix.com/article/CTX267679</a>

Apply Mitigation Steps for CVE-2019-19781


Art Manion and Will Dormann report:


	    By using an older and less-secure form of open(), it is
	    possible for untrusted template files to cause reads/writes
	    outside of the template directories. This vulnerability is
	    a component of the recent Citrix exploit.
	  



Art Manion and Will Dormann report:
<pre><code> By using an older and less-secure form of open(), it is
 possible for untrusted template files to cause reads/writes
 outside of the template directories. This vulnerability is
 a component of the recent Citrix exploit.</code></pre>

FreeBSD

Template::Toolkit -- Directory traversal on write

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CVE-2019-19781

2 fixes found:

Workaround

Apply Mitigation Steps for CVE-2019-19781

Version Update

Template::Toolkit -- Directory traversal on write