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CVE-2023-32684— In Lima, a malicious disk image could read a single file on the host filesystem as a qcow2/vmdk backing file

Quick assessment

Affected
lima-vm lima
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.

github lima是一个应用软件。Linux虚拟机,在macOS(又名“Linux-on-Mac”,“macOS子系统为Linux”,“Mac containerd”,非正式) Lima 0.16.0 之前版本存在安全漏洞，该漏洞源于具有恶意磁盘镜像的虚拟机实例可以读取主机文件系统上的单个文件，即使没有从主机挂载文件系统。

CVSS 2.7 · Low EPSS 0.27% · P18
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I. Basic Information for CVE-2023-32684

Vulnerability Information
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Vulnerability Title
In Lima, a malicious disk image could read a single file on the host filesystem as a qcow2/vmdk backing file
Source: CVE Program / CVE List V5
Vulnerability Description
Lima launches Linux virtual machines, typically on macOS, for running containerd. Prior to version 0.16.0, a virtual machine instance with a malicious disk image could read a single file on the host filesystem, even when no filesystem is mounted from the host. The official templates of Lima and the well-known third party products (Colima, Rancher Desktop, and Finch) are unlikely to be affected by this issue. To exploit this issue, the attacker has to embed the target file path (an absolute or a relative path from the instance directory) in a malicious disk image, as the qcow2 (or vmdk) backing file path string. As Lima refuses to run as the root, it is practically impossible for the attacker to read the entire host disk via `/dev/rdiskN`. Also, practically, the attacker cannot read at least the first 512 bytes (MBR) of the target file. The issue has been patched in Lima in version 0.16.0 by prohibiting using a backing file path in the VM base image.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:C/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
对外部实体的文件或目录可访问
Source: CVE Program / CVE List V5
Vulnerability Title
Lima 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
github lima是一个应用软件。Linux虚拟机,在macOS(又名“Linux-on-Mac”,“macOS子系统为Linux”,“Mac containerd”,非正式) Lima 0.16.0 之前版本存在安全漏洞，该漏洞源于具有恶意磁盘镜像的虚拟机实例可以读取主机文件系统上的单个文件，即使没有从主机挂载文件系统。
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
lima-vm lima < 0.16.0 -

II. Public POCs for CVE-2023-32684

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III. Intelligence Information for CVE-2023-32684

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Patches & Fixes for CVE-2023-32684 (1)

Vendor Advisories for CVE-2023-32684 (1)

Other References for CVE-2023-32684 (1)

IV. Related Vulnerabilities

Same product: lima
Same vendor: lima-vm
Same weakness: CWE-552

V. Comments for CVE-2023-32684

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