Attacker Value
Unknown
(0 users assessed)
Exploitability
Unknown
(0 users assessed)
User Interaction
None
Privileges Required
Low
Attack Vector
Local
0

CVE-2021-3930

Disclosure Date: February 18, 2022 •
CVE-2021-3930 CVSS v3 Base Score: 6.5
Add MITRE ATT&CK tactics and techniques that apply to this CVE.

Description

An off-by-one error was found in the SCSI device emulation in QEMU. It could occur while processing MODE SELECT commands in mode_sense_page() if the ‘page’ argument was set to MODE_PAGE_ALLS (0x3f). A malicious guest could use this flaw to potentially crash QEMU, resulting in a denial of service condition.

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CVSS V3 Severity and Metrics
Base Score:
6.5 Medium
Impact Score:
4
Exploitability Score:
2
Vector:
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
Attack Vector (AV):
Local
Attack Complexity (AC):
Low
Privileges Required (PR):
Low
User Interaction (UI):
None
Scope (S):
Changed
Confidentiality (C):
None
Integrity (I):
None
Availability (A):
High

General Information

Offensive Application
Unknown
Utility Class
Unknown
Ports
Unknown
OS
Unknown
Vulnerable Versions
QEMU qemu-kvm 6.2.0-rc0
Prerequisites
Unknown
Discovered By
Unknown
PoC Author
Unknown
Metasploit Module
Unknown
Reporter
Unknown

Vendors

  • debian,
  • qemu,
  • redhat

Products

  • codeready linux builder 8.0,
  • codeready linux builder for ibm z systems 8.0,
  • codeready linux builder for power little endian 8.0,
  • debian linux 10.0,
  • debian linux 9.0,
  • enterprise linux 8.0,
  • enterprise linux advanced virtualization eus 8.4,
  • enterprise linux for ibm z systems 8.0,
  • enterprise linux for power little endian 8.0,
  • openstack 10,
  • openstack 13,
  • qemu
Technical Analysis