Headline

CVE-2021-34987: ZDI-22-386

This vulnerability allows local attackers to escalate privileges on affected installations of Parallels Desktop 16.5.1 (49187). 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 HDAudio virtual device. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length buffer. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of the hypervisor. Was ZDI-CAN-14969.

2 years ago

CVE

Open in Source

#vulnerability #buffer_overflow

February 18th, 2022

Parallels Desktop HDAudio Buffer Overflow Local Privilege Escalation Vulnerability****ZDI-22-386
ZDI-CAN-14969

CVE ID

CVE-2021-34987

CVSS SCORE

8.2, (AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H)

AFFECTED VENDORS

Parallels

AFFECTED PRODUCTS

Desktop

VULNERABILITY DETAILS

This vulnerability allows local attackers to escalate privileges on affected installations of Parallels Desktop. An attacker must first obtain the ability to execute high-privileged code on the target guest system in order to exploit this vulnerability.

ADDITIONAL DETAILS

Parallels has issued an update to correct this vulnerability. More details can be found at:
https://kb.parallels.com/en/125013

DISCLOSURE TIMELINE

2021-09-10 - Vulnerability reported to vendor
2022-02-18 - Coordinated public release of advisory

CREDIT

Ben McBride

BACK TO ADVISORIES

SolarWinds Platform was susceptible to the Deserialization of Untrusted Data. This vulnerability allows a remote adversary with Orion admin-level account access to SolarWinds Web Console to execute arbitrary commands.