Citrix ShareFile Flaw Could Let Attackers Steal Corporate Secrets

Because the previous few weeks, software big Citrix has privately been rolling out a essential application update to its organization shoppers that patches numerous stability vulnerabilities affecting Citrix ShareFile written content collaboration system.

The protection advisory—about which The Hacker News figured out from Dimitri van de Giessen, an ethical hacker and technique engineer—is scheduled to be offered publicly later these days on the Citrix web page.

Citrix ShareFile is an business-level file sharing option for businesses using which workers can securely trade proprietary and sensitive business enterprise facts with every single other.

The software gives an on-premises secure cloud natural environment for data storage with auditing abilities and regulatory compliance controls. For case in point, a enterprise can remotely lock or wipe information from likely compromised cellular equipment, or they’re when lost or stolen.

The freshly discovered protection issues (CTX-CVE-2020-7473) particularly have an effect on client-managed on-premises Citrix ShareFile storage zone controllers, a element that shops company info driving the firewall.

The checklist of vulnerabilities are:

  • CVE-2020-7473
  • CVE-2020-8982
  • CVE-2020-8983

In accordance to the advisory, if exploited, the vulnerabilities could enable an unauthenticated attacker to compromise the storage zones controller potentially and accessibility sensitive ShareFile paperwork and folders.

Listing of Affected and Patched Citrix ShareFile Variations

If your firm uses on-premises ShareFile storage zones controller versions 5.9. / 5.8. /5.7./ 5.6. / 5.5. and before, you are affected and proposed to quickly improve your platform to Storage zones controller 5.10. / 5.9.1 / 5.8.1 or later on.

It is essential to observe that if your storage zone was made on any of the impacted versions, merely upgrading your software package to a patched edition would not absolutely resolve the vulnerability.

To deal with this, the enterprise has separately released a mitigation software that you need to have to be operate on your major Storage zones controller initial and then on any secondary controllers.

“The moment the software operates correctly on your major zone, you Have to NOT revert any variations to it. Reverting modifications will trigger your zone to turn out to be unavailable,” the advisory warned.

You can discover a entire phase by move information in the advisory, as soon as it becomes readily available publicly.

Moreover the on-premises remedy, the cloud versions of ShareFile storage zone controllers were being also impacted, but the organization has already patched them and isn’t going to need any even more action from people.

Wherever the Flaw Resides?

At the time of crafting, while not significantly complex details on the underlying vulnerabilities are readily available, an preliminary patch inspection by Dimitri reveals that at minimum a person of the flaws could have resided in an outdated ASP.net Toolkit that Citrix Sharefile utilised.

The 9-yr-aged out-of-date model of AjaxControlToolkit that is allegedly bundled with the impacted variations of ShareFile program includes directory traversal and remote code execution vulnerabilities (CVE-2015-4670), which have been disclosed publicly in 2015.

citrix sharefile vulnerability

To test if Citrix ShareFile implementation is influenced or not, a person can take a look at the subsequent URL in the browser, and if the website page returns blank, it truly is vulnerable, and if it through 404 error, it’s either not flawed or has already been patched.

https://yoursharefileserver.companyname.com/UploadTest.aspx

According to Dimitri, the mitigation device makes some variations to the world-wide-web.config file and then also deletes UploadTest.aspx and XmlFeed.aspx from the influenced servers.

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