SB2021080307 - Multiple vulnerabilities in Parallels Desktop

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Main Vulnerability Database SB2021080307

SB2021080307 - Multiple vulnerabilities in Parallels Desktop

Published: August 3, 2021

Security Bulletin ID SB2021080307
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 4
Exploitation vector Local access
Highest impact Code execution

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 4 vulnerabilities.


1) Uncontrolled Memory Allocation (CVE-ID: CVE-2021-34854)

CWE-ID: CWE-789 - Uncontrolled Memory Allocation

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to uncontrolled memory allocation in the Toolgate component. A local user can escalate privileges and execute arbitrary code in the context of the hypervisor.


2) Out-of-bounds write (CVE-ID: CVE-2021-34857)

CWE-ID: CWE-787 - Out-of-bounds write

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a local user to compromise vulnerable system.

The vulnerability exists due to a boundary error when processing untrusted input within the Toolgate component. A local administrator can trigger out-of-bounds write and execute arbitrary code on the target system.


3) Information disclosure (CVE-ID: CVE-2021-34855)

CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a local user to gain access to potentially sensitive information.

The vulnerability exists due to the lack of proper initialization of memory within the Toolgate component. A local user can gain unauthorized access to sensitive information on the system.


4) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2021-34856)

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a memory corruption condition in the virtio-gpu virtual device. A local administrator can escalate privileges and execute arbitrary code in the context of the hypervisor. 


Remediation

Install update from vendor's website.

References