Buffer overflow in Parallels Desktop
CVE-2021-34857
This vulnerability allows local attackers to escalate privileges on affected installations of Parallels Desktop 16.1.3 (49160). 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 Toolgate component. The issue results 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 vulnerability to escalate privileges and execute arbitrary code in the context of the hypervisor. Was ZDI-CAN-13601.
Vulnerability class: Buffer Overflow
EPSS: 0.003 (17.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.
Affected products
- Parallels Desktop — versions 16.1.3 (49160)
- Parallels Parallels_desktop — versions 16.1.3
Weakness classification (CWE)
References
- zdi-disclosures@trendmicro.com (Patch, x_refsource_MISC, Vendor Advisory)
- zdi-disclosures@trendmicro.com (VDB Entry, Third Party Advisory, x_refsource_MISC)
Frequently asked questions
- What is CVE-2021-34857?
- CVE-2021-34857 is a high-severity vulnerability in Parallels Desktop, classified under Out-of-bounds Write. CVSS score: 8.8/10. Published 2021-10-25.
- How severe is CVE-2021-34857?
- High severity. CVSS v3 base score is 8.8 out of 10.