SB2020081903 - Information disclosure in Parallels Desktop

Description

This security bulletin contains information about 2 vulnerabilities.

1) Input validation error (CVE-ID: CVE-2020-17393)

CWE-ID: CWE-20 - Improper input validation

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

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

The vulnerability exists due to insufficient validation of user-supplied input within the prl_hypervisor kext. A local user can pass specially crafted input to the application and gain access to sensitive information on the system.

2) Out-of-bounds read (CVE-ID: CVE-2020-17390)

CWE-ID: CWE-125 - Out-of-bounds read

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/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 a boundary condition within the hypervisor kernel extension. A local user can run a specially crafted program to trigger out-of-bounds read condition and gain access to sensitive data in the memory.

Remediation

Install update from vendor's website.

References

• https://www.zerodayinitiative.com/advisories/ZDI-20-1011/
• https://kb.parallels.com/en/125013
• https://www.zerodayinitiative.com/advisories/ZDI-20-1008/