CVE-2021-34856

CVSS V2 Medium 4.6 CVSS V3 High 8.8
Description
This vulnerability allows local attackers to escalate privileges on affected installations of Parallels Desktop 16.1.3 (49160). An attacker must first obtain the ability to execute high-privileged code on the target guest system in order to exploit this vulnerability. The specific flaw exists within the virtio-gpu virtual device. The issue results from the lack of proper validation of user-supplied data, which can result in a memory corruption condition. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of the hypervisor. Was ZDI-CAN-13581.
Overview
  • CVE ID
  • CVE-2021-34856
  • Assigner
  • zdi-disclosures@trendmicro.com
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2021-10-25T17:15:08
  • Last Modified Date
  • 2022-10-24T14:23:50
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
cpe:2.3:a:parallels:parallels_desktop:16.1.3:*:*:*:*:macos:*:* 1 OR
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:L/AC:L/Au:N/C:P/I:P/A:P
  • Access Vector
  • LOCAL
  • Access Compatibility
  • LOW
  • Authentication
  • NONE
  • Confidentiality Impact
  • PARTIAL
  • Integrity Impact
  • PARTIAL
  • Availability Impact
  • PARTIAL
  • Base Score
  • 4.6
  • Severity
  • MEDIUM
  • Exploitability Score
  • 3.9
  • Impact Score
  • 6.4
CVSS Version 3
  • Version
  • 3.1
  • Vector String
  • CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
  • Attack Vector
  • LOCAL
  • Attack Compatibility
  • LOW
  • Privileges Required
  • LOW
  • User Interaction
  • NONE
  • Scope
  • CHANGED
  • Confidentiality Impact
  • HIGH
  • Availability Impact
  • HIGH
  • Base Score
  • 8.8
  • Base Severity
  • HIGH
  • Exploitability Score
  • 2
  • Impact Score
  • 6
References
Reference URL Reference Tags
https://kb.parallels.com/125013 Patch Vendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-938/ Third Party Advisory VDB Entry
History
Created Old Value New Value Data Type Notes
2022-05-10 06:49:31 Added to TrackCVE
2022-12-05 13:13:59 2021-10-25T17:15Z 2021-10-25T17:15:08 CVE Published Date updated
2022-12-05 13:13:59 2022-10-24T14:23:50 CVE Modified Date updated
2022-12-05 13:13:59 Analyzed Vulnerability Status updated