CVE-2021-42979 is an Integer Overflow vulnerability affecting NoMachine Cloud Server versions above 4.0.346 and below 7.7.4. This flaw allows a local attacker to execute arbitrary code in kernel mode or trigger a denial of service through memory corruption and an OS crash by sending specially crafted I/O Request Packets to the IOCTL Handler 0x22001B. With a CVSS score of 8.8 (High), it presents a significant risk due to its low attack complexity and high impact on confidentiality, integrity, and availability. While there is no evidence of active exploitation, public exploit code, or Metasploit modules, the vulnerability has garnered some community discussion and media coverage, indicating awareness within the cybersecurity community.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
> 4.0.346, < 7.7.4CPE matchmatch criteria | cpe:2.3:a:nomachine:cloud_server:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.