Vulnerability Details : CVE-2021-34986
This vulnerability allows local attackers to escalate privileges on affected installations of Parallels Desktop 16.5.0 (49183). 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 Parallels Service. By creating a symbolic link, an attacker can abuse the service to execute a file. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of root. Was ZDI-CAN-13932.
Vulnerability category: Execute code
Products affected by CVE-2021-34986
- cpe:2.3:a:parallels:parallels_desktop:16.5.0:*:*:*:*:macos:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-34986
0.05%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 13 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-34986
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
---|---|---|---|---|---|---|
7.8
|
HIGH | CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
1.8
|
5.9
|
Zero Day Initiative | |
7.8
|
HIGH | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
1.8
|
5.9
|
NIST |
CWE ids for CVE-2021-34986
-
The product checks the state of a resource before using that resource, but the resource's state can change between the check and the use in a way that invalidates the results of the check. This can cause the product to perform invalid actions when the resource is in an unexpected state.Assigned by: zdi-disclosures@trendmicro.com (Primary)
References for CVE-2021-34986
-
https://kb.parallels.com/en/125013
Parallels Desktop Security UpdatesVendor Advisory
-
https://www.zerodayinitiative.com/advisories/ZDI-22-385/
ZDI-22-385 | Zero Day InitiativeThird Party Advisory;VDB Entry
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