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CVE-2021-3626— Windows version of Multipass unauthenticated localhost tcp control socket can perform mounts

Quick assessment

Affected
Canonical Multipass
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.

Multipass是一个适用于 Linux、Windows 和 MacOS 的轻量级 Vm 管理器。 Multipass 1.7.0之前的Windows版本存在安全漏洞，该漏洞允许权限升级。

CVSS 8.8 · High EPSS 0.25% · P15

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation
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I. Basic Information for CVE-2021-3626

Vulnerability Information
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Vulnerability Title
Windows version of Multipass unauthenticated localhost tcp control socket can perform mounts
Source: CVE Program / CVE List V5
Vulnerability Description
The Windows version of Multipass before 1.7.0 allowed any local process to connect to the localhost TCP control socket to perform mounts from the operating system to a guest, allowing for privilege escalation.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
文件名或路径的外部可控制
Source: CVE Program / CVE List V5
Vulnerability Title
Multipass 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Multipass是一个适用于 Linux、Windows 和 MacOS 的轻量级 Vm 管理器。 Multipass 1.7.0之前的Windows版本存在安全漏洞，该漏洞允许权限升级。
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
Canonical Multipass unspecified ~ 1.7.0 -

II. Public POCs for CVE-2021-3626

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III. Intelligence Information for CVE-2021-3626

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Patches & Fixes for CVE-2021-3626 (1)

Same Patch Batch · Canonical · 2021-10-01 · 4 CVEs total

CVE-2021-3747 8.8 HIGH MacOS version of Multipass incorrect owner for application directory
CVE-2021-3710 6.5 MEDIUM Apport info disclosure via path traversal bug in read_file
CVE-2021-3709 6.5 MEDIUM Apport file permission bypass through emacs byte compilation errors

IV. Related Vulnerabilities

Same product: Multipass
Same vendor: Canonical
Same weakness: CWE-73

V. Comments for CVE-2021-3626

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