High severity · published Dec 7, 2021
CVE-2021-42972
NoMachine Server is affected by Buffer Overflow
8.8
CVSS
0.5%
EPSS
No
On KEV
Description
NoMachine Server is affected by Buffer Overflow. IOCTL Handler 0x22001B in the NoMachine Server above 4.0.346 and below 7.7.4 allow local attackers to execute arbitrary code in kernel mode or cause a denial of service (memory corruption and OS crash) via specially crafted I/O Request Packet.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 41% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SE
Server · Nomachine
after 4.0.346 before 7.7.4 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-42972
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-42972
Exploit
https://www.sentinelone.com/labs/usb-over-ethernet-multiple-privilege-escalation-vulnerabilities-in-aws-and-other-major-cloud-services/
More from Server
8.8
CVE-2021-42973
NoMachine Server is affected by Integer Overflow