#VU29586 Code Injection in Citrix products - CVE-2020-8194

Vulnerability identifier: #VU29586

Vulnerability risk: High

CVSSv4.0: 7.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Amber]

CVE-ID: CVE-2020-8194

CWE-ID: CWE-94

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Citrix Netscaler ADC
Client/Desktop applications / Software for system administration
Citrix NetScaler Gateway
Server applications / Application servers
SD-WAN 5100 WANOP
Hardware solutions / Other hardware appliances
SD-WAN 5000 WANOP
Hardware solutions / Other hardware appliances
SD-WAN 4100 WANOP
Hardware solutions / Other hardware appliances
SD-WAN 4000 WANOP
Hardware solutions / Other hardware appliances

Vendor: Citrix

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to improper input validation. A remote attacker can trick a victim to download a malicious binary from the NSIP and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Citrix Netscaler ADC: 10.5 Build 67.10/67.13 - 12.1

Citrix NetScaler Gateway: 10.0 - 13.0.47.24

SD-WAN 5100 WANOP: 10.2.3 - 11.2.0

SD-WAN 5000 WANOP: 10.2.3 - 11.2.0

SD-WAN 4100 WANOP: 10.2.3 - 11.2.0

SD-WAN 4000 WANOP: 10.2.3 - 11.2.0

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External links
https://support.citrix.com/article/CTX276688

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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. However, proof of concept for this vulnerability is available.