Vulnerability Details : CVE-2021-34855
This vulnerability allows local attackers to disclose sensitive information on affected installations of Parallels Desktop 16.1.3 (49160). An attacker must first obtain the ability to execute low-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 initialization of memory prior to accessing it. 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-13592.
Vulnerability category: Execute code
Products affected by CVE-2021-34855
- cpe:2.3:a:parallels:parallels_desktop:16.1.3:*:*:*:*:macos:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-34855
0.07%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 31 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-34855
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
2.1
|
LOW | AV:L/AC:L/Au:N/C:P/I:N/A:N |
3.9
|
2.9
|
NIST | |
|
6.5
|
MEDIUM | CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N |
2.0
|
4.0
|
Zero Day Initiative | |
|
6.5
|
MEDIUM | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N |
2.0
|
4.0
|
NIST |
CWE ids for CVE-2021-34855
-
The product uses or accesses a resource that has not been initialized.Assigned by: zdi-disclosures@trendmicro.com (Primary)
References for CVE-2021-34855
-
https://kb.parallels.com/125013
Parallels Desktop Security UpdatesPatch;Vendor Advisory
-
https://www.zerodayinitiative.com/advisories/ZDI-21-939/
ZDI-21-939 | Zero Day InitiativeThird Party Advisory;VDB Entry
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