Vulnerability · Published Aug 25, 2020 · Assigned by zdi

CVE-2020-17392

High 8.8

In plain English

A high-severity security flaw in Desktop from Parallels. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 45% of all known vulnerabilities).

Severity (CVSS 3.0)8.8High

Exploit odds (30 days)0.5%top 54.8% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

Official description

This vulnerability allows local attackers to escalate privileges on affected installations of Parallels Desktop 15.1.3-47255. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within the handler for HOST_IOCTL_SET_KERNEL_SYMBOLS in the prl_hypervisor kext. The issue results from the lack of proper validation of a user-supplied value prior to dereferencing it as a pointer. An attacker can leverage this vulnerability to escalate privileges and execute code in the context of the kernel. Was ZDI-CAN-10519.

Affected products (as reported)

Vendor	Product	Versions
Parallels	Desktop	15.1.3-47255

Weakness: CWE-822 · Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

References

https://kb.parallels.com/en/125013 x_refsource_MISC
https://www.zerodayinitiative.com/advisories/ZDI-20-1010/ x_refsource_MISC