Remote code execution in Citrix Workspace App for Windows



Published: 2020-07-21 | Updated: 2020-09-23
Risk High
Patch available YES
Number of vulnerabilities 1
CVE ID CVE-2020-8207
CWE ID CWE-345
Exploitation vector Network
Public exploit Public exploit code for vulnerability #1 is available.
Vulnerable software
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Citrix Workspace for Windows
Server applications / Remote management servers, RDP, SSH

Vendor Citrix

Security Advisory

This security advisory describes one high risk vulnerability.

1) Insufficient verification of data authenticity

Risk: High

CVSSv3: 7.9 [CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C] [PCI]

CVE-ID: CVE-2020-8207

CWE-ID: CWE-345 - Insufficient Verification of Data Authenticity

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise the affected system.

The vulnerability exists within the automatic update service due to improper verification of data authenticity when installing updates. A remote attacker can execute arbitrary application on the system with elevated privileges.

Successful exploitation of the vulnerability requires that Windows file sharing (SMB) is enabled on the affected system and the updater service is running.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Citrix Workspace for Windows: 1808, 1809, 1810, 1811, 1812, 1902, 1903, 1904, 1904.1, 1905, 1907, 1909, 1911, 1912, 2002, 2006, 2006.1

CPE External links

https://support.citrix.com/article/CTX277662

Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

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.



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