Vulnerability identifier: #VU973

Vulnerability risk: Medium

CVSSv3.1: 7.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2016-6273

CWE-ID: CWE-284

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Citrix License Server
Server applications / Application servers

Vendor: Citrix

Description
The vulnerability allows a remote unauthenticated user to cause DoS conditions on the target system.
The weakness occurs in Citrix Licence Server and exists due to access control error that allow attackers to trigger the affected server to crash.
Successful exploitation of the vulnerability results in denial of service on the vulnerable system.

Mitigation
Update to version 11.14.0.1 or later.
https://www.citrix.com/downloads/licensing/license-server/license-server-version-111401-for-windows.html#ctx-dl-eula

Vulnerable software versions

Citrix License Server: 11.5 - 11.13.1

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External links
http://support.citrix.com/article/CTX217430

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.