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CVE-2024-38358— Symlink bypasses filesystem sandbox in wasmer

Quick assessment

Affected
wasmerio wasmer
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.

Wasmer是Wasmer开源的一个应用软件，使轻量级的容器能够在任何地方运行。 Wasmer 4.3.2之前版本存在安全漏洞，该漏洞源于绕过文件系统沙盒。

CVSS 2.9 · Low EPSS 0.20% · P9

Possible ATT&CK Techniques 1 AI

T1564.004 · NTFS File Attributes
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I. Basic Information for CVE-2024-38358

Vulnerability Information
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Vulnerability Title
Symlink bypasses filesystem sandbox in wasmer
Source: CVE Program / CVE List V5
Vulnerability Description
Wasmer is a web assembly (wasm) Runtime supporting WASIX, WASI and Emscripten. If the preopened directory has a symlink pointing outside, WASI programs can traverse the symlink and access host filesystem if the caller sets both `oflags::creat` and `rights::fd_write`. Programs can also crash the runtime by creating a symlink pointing outside with `path_symlink` and `path_open`ing the link. This issue has been addressed in commit `b9483d022` which has been included in release version 4.3.2. Users are advised to upgrade. There are no known workarounds for this vulnerability.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
Wasmer 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Wasmer是Wasmer开源的一个应用软件，使轻量级的容器能够在任何地方运行。 Wasmer 4.3.2之前版本存在安全漏洞，该漏洞源于绕过文件系统沙盒。
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
wasmerio wasmer < 4.3.2 -

II. Public POCs for CVE-2024-38358

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III. Intelligence Information for CVE-2024-38358

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Patches & Fixes for CVE-2024-38358 (1)

Vendor Advisories for CVE-2024-38358 (1)

IV. Related Vulnerabilities

Same product: wasmer
Same vendor: wasmerio
Same weakness: CWE-22

V. Comments for CVE-2024-38358

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