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CVE-2021-34987

Quick assessment

Affected
Parallels Desktop
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Corel Parallels Desktop是加拿大Corel公司的一套适用于macOS平台的虚拟机软件。 Corel Parallels Desktop 存在权限许可和访问控制问题漏洞，该漏洞源于在将用户提供的数据复制到固定长度缓冲区之前缺乏对长度的正确验证。已获取最高权限的在虚拟机管理程序的环境中提升权限并执行任意代码。

AI Predicted 6.8 Difficulty: Moderate EPSS 0.34% · P27

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation
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I. Basic Information for CVE-2021-34987

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
This vulnerability allows local attackers to escalate privileges on affected installations of Parallels Desktop 16.5.1 (49187). 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 HDAudio virtual device. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length buffer. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of the hypervisor. Was ZDI-CAN-14969.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
未进行输入大小检查的缓冲区拷贝(传统缓冲区溢出)
Source: CVE Program / CVE List V5
Vulnerability Title
Corel Parallels Desktop 权限许可和访问控制问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Corel Parallels Desktop是加拿大Corel公司的一套适用于macOS平台的虚拟机软件。 Corel Parallels Desktop 存在权限许可和访问控制问题漏洞，该漏洞源于在将用户提供的数据复制到固定长度缓冲区之前缺乏对长度的正确验证。已获取最高权限的在虚拟机管理程序的环境中提升权限并执行任意代码。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Parallels Desktop 16.5.1 (49187) -

II. Public POCs for CVE-2021-34987

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III. Intelligence Information for CVE-2021-34987

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Vendor Advisories for CVE-2021-34987 (1)

Other References for CVE-2021-34987 (1)

Same Patch Batch · Parallels · 2022-07-15 · 5 CVEs total

CVE-2021-34986 Corel Parallels Desktop 安全漏洞
CVE-2022-34889 Corel Parallels Desktop 缓冲区错误漏洞
CVE-2022-34890 Corel Parallels Desktop 安全漏洞
CVE-2022-34891 Corel Parallels Desktop 安全漏洞

IV. Related Vulnerabilities

Same product: Desktop
Same vendor: Parallels
Same weakness: CWE-120

V. Comments for CVE-2021-34987

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