Expert publicly discloses Zoho ManageEngine zero
Vulnerabilities mentionedAll →
| CVE | Vulnerability | CVSS | EPSS | Flags | Affected | Exposure | Published |
|---|---|---|---|---|---|---|---|
| CVE-2020-10189 | Unauthenticated RCE in Zoho ManageEngine Desktop Central Zoho ManageEngine Desktop Central contains a file upload vulnerability (CWE-502, deserialization of untrusted data) that can be exploited without authentication. A remote attacker sends crafted upload requests to the affected application, which accepts and processes the uploaded content without any credentials, resulting in execution of attacker-controlled code. Successful exploitation yields remote code execution on the server hosting Desktop Central, giving the attacker a foothold on an endpoint-management system that typically has broad reach into a corporate network. Any organization running the affected Zoho ManageEngine product is exposed, and exploitability does not depend on user interaction or credentials. The flaw is listed in CISA's Known Exploited Vulnerabilities catalog (added 2021-11-03), indicating known exploitation in the wild, and EPSS assigns a 99.9% probability of exploitation within 30 days; specific exploited versions are not stated in the available data. Do: Apply updates per Zoho/ManageEngine vendor instructions immediately, as the CISA KEV required action specifies. Restrict internet exposure of the Desktop Central server and audit it for signs of compromise (unexpected processes, webshells, outbound connections) since unauthenticated RCE has been exploited in the wild. Check that any exposed instances are patched before treating network access as safe. | 9.8 | 100% | KEV PoC ×3 |
| largetens of thousands of internet-exposed Desktop Central servers (order of magnitude 10k-100k) |
Full article427 words · extracted from securityaffairs.com · click to collapse
A security researcher has disclosed details and PoC code for a zero-day vulnerability in the Zoho ManageEngine product via Twitter.
A security expert has disclosed details about a zero-day vulnerability in a Zoho enterprise product via Twitter, a circumstance that could cause serious problems to customers of the company.
The flaw affects Zoho ManageEngine Desktop Central endpoint management solution that helps organizations in managing servers, laptops, desktops, smartphones, and tablets from a central location.
A researcher named Steven Seeley, disclosed technical details and the proof-of-concept code for the Zoho zero-day issue.
“This vulnerability allows remote attackers to execute arbitrary code on affected installations of ManageEngine Desktop Central. Authentication is not required to exploit this vulnerability.” read the advisory published by the expert.
“The specific flaw exists within the FileStorage class. The issue results from the lack of proper validation of user-supplied data, which can result in deserialization of untrusted data. An attacker can leverage this vulnerability to execute code under the context of SYSTEM.”
The vulnerability resides in the FileStorage class, it is caused by the lack of proper validation of user-supplied data. The attackers can exploit the vulnerability to execute code under the context of SYSTEM and take full control of the vulnerable ManageEngine systems,
The zero-day could be used by threat actors to target organizations and managed service providers (MSPs) using Zoho ManageEngine to deliver malware, especially ransomware.
Searching for exposed Zoho ManageEngine systems online using Shodan we can find over 2300 installs.
Experts also warn that Zoho ManageEngine systems that are not exposed online could be targeted by threat actors once compromised the hosting network. Then attackers can exploit the issue to deliver malware to all the systems on the company’s network.
Experts believe that the availability of a PoC exploit code for the vulnerability will trigger a new wave of attacks targeting the Zoho ManageEngine systems.
At the time there is no fix for the flaw, the company declared that it was not informed by Seeley about the issue and is currently working on a patch. On the other site, Seeley claimed on Twitter that Zoho usually ignored researchers.
Update 06/03/2020
The remote code execution vulnerability in Desktop Central (CVE-2020-10189) has been fixed in build 10.0.479, available at https://manageengine.com/products/desktop-central/service-packs.html…. For more information about the vulnerability, please visit https://t.co/uJedc7dexl
We have identified the issue and are working on a patch with top priority. We will update once it is done. ^BG
— Zoho (@Zoho) March 6, 2020
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