Vulnerability Details : CVE-2021-31424
This vulnerability allows local attackers to escalate privileges on affected installations of Parallels Desktop 15.1.5-47309. 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 Open Tools Gate component. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length heap-based buffer. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of the hypervisor. Was ZDI-CAN-12848.
Vulnerability category: OverflowExecute code
Exploit prediction scoring system (EPSS) score for CVE-2021-31424
Probability of exploitation activity in the next 30 days: 0.06%
Percentile, the proportion of vulnerabilities that are scored at or less: ~ 22 % EPSS Score History EPSS FAQ
CVSS scores for CVE-2021-31424
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source |
---|---|---|---|---|---|
4.6
|
MEDIUM | AV:L/AC:L/Au:N/C:P/I:P/A:P |
3.9
|
6.4
|
NIST |
8.8
|
HIGH | CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H |
2.0
|
6.0
|
Zero Day Initiative |
8.8
|
HIGH | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H |
2.0
|
6.0
|
NIST |
CWE ids for CVE-2021-31424
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A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().Assigned by: zdi-disclosures@trendmicro.com (Primary)
References for CVE-2021-31424
-
https://www.zerodayinitiative.com/advisories/ZDI-21-434/
ZDI-21-434 | Zero Day InitiativeThird Party Advisory;VDB Entry
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https://kb.parallels.com/en/125013
Parallels Desktop Security UpdatesVendor Advisory
Products affected by CVE-2021-31424
- cpe:2.3:a:parallels:parallels_desktop:15.1.5-47309:*:*:*:*:*:*:*