PT-2021-23705 · Nomachine · Nomachine Enterprise Desktop

Kasif Dekel · Published 2021-12-07 · Updated 2021-12-08 · CVE-2021-42977

Positive Technologies (AI Summary)

CVSS v3.1

8.8

High

Base vector

AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions NoMachine Enterprise Desktop versions 4.0.346 through 7.7.4

Description The issue allows local attackers to execute arbitrary code in kernel mode or cause a denial of service, resulting in memory corruption and OS crash, via specially crafted I/O Request Packet. This is due to an Integer Overflow in the IOCTL Handler 0x22001B.

Recommendations For versions 4.0.346 through 7.7.4, update to version 7.7.4 or later to resolve the issue. As a temporary workaround, consider restricting access to the IOCTL Handler 0x22001B to minimize the risk of exploitation.

Exploit

Fix

Integer Overflow

Weakness Enumeration

CWE-190

Related Identifiers

CVE-2021-42977

Affected Products

Nomachine Enterprise Desktop

References · 4

• 🔥 https://sentinelone.com/labs/usb-over-ethernet-multiple-privilege-escalation-vulnerabilities-in-aws-and-other-major-cloud-services · Exploit
• https://osv.dev/vulnerability/CVE-2021-42977 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-42977 · Security Note
• https://t.me/cibsecurity/33498 · Telegram Post