PT-2020-20345 · Parallels · Parallels Desktop

Grigoritchy · Published 2020-03-13 · Updated 2020-05-04 · CVE-2020-8875

Positive Technologies (AI Summary)

CVSS v3.1

8.8

High

Base vector

AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Parallels Desktop version 15.1.2-47123

Description This issue allows local attackers to escalate privileges on affected installations. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this issue. The specific flaw exists within the IOCTL handler, resulting from the lack of proper validation of user-supplied data, which can result in a write past the end of an allocated buffer. An attacker can leverage this issue to escalate privileges and execute code in the context of the kernel.

Recommendations For Parallels Desktop version 15.1.2-47123, consider disabling the IOCTL handler as a temporary workaround until a patch is available. Restrict access to the kernel module to minimize the risk of exploitation. Avoid using user-supplied data in the IOCTL handler until the issue is resolved. At the moment, there is no information about a newer version that contains a fix for this issue.

Fix

Improper Validation of Array Index

Memory Corruption

Weakness Enumeration

CWE-129

CWE-787

Related Identifiers

CVE-2020-8875

ZDI-20-296

Affected Products

Parallels Desktop

References · 4

• https://osv.dev/vulnerability/CVE-2020-8875 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-8875 · Security Note
• https://zerodayinitiative.com/advisories/ZDI-20-296 · Security Note
• https://t.me/cvenotify/2030 · Telegram Post