Vulnerability · Published Apr 29, 2021 · Assigned by zdi
CVE-2021-31431
Medium 6.0
In plain English
A medium-severity out-of-bounds read 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 0.4% (higher than 39% of all known vulnerabilities).
Official description
This vulnerability allows local attackers to disclose sensitive information on affected installations of Parallels Desktop 15.1.5-47309. 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 IDE virtual device. The issue results from the lack of proper validation of user-supplied data, which can result in a read past the end of an allocated buffer. An attacker can leverage this in conjunction with other vulnerabilities to escalate privileges and execute arbitrary code in the context of the hypervisor. Was ZDI-CAN-13189.
Affected products (as reported)
Weakness: CWE-125 · Vector: CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N
References
- https://kb.parallels.com/en/125013 x_refsource_MISC
- https://www.zerodayinitiative.com/advisories/ZDI-21-439/ x_refsource_MISC