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CVE-2022-39393— Wasmtime vulnerable to data leakage between instances in the pooling allocator

Quick assessment

Affected
bytecodealliance wasmtime
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.

Wasmtime是一个字节码联盟项目，它是一个独立的仅用于 WebAssembly 和 WASI 的 wasm 优化运行时。 Wasmtime 2.0.2之前的版本存在安全漏洞，该漏洞源于其池分配器中实例之间的数据泄漏。

CVSS 8.6 · High EPSS 0.71% · P52
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I. Basic Information for CVE-2022-39393

Vulnerability Information
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Vulnerability Title
Wasmtime vulnerable to data leakage between instances in the pooling allocator
Source: CVE Program / CVE List V5
Vulnerability Description
Wasmtime is a standalone runtime for WebAssembly. Prior to versions 2.0.2 and 1.0.2, there is a bug in Wasmtime's implementation of its pooling instance allocator where when a linear memory is reused for another instance the initial heap snapshot of the prior instance can be visible, erroneously to the next instance. This bug has been patched and users should upgrade to Wasmtime 2.0.2 and 1.0.2. Other mitigations include disabling the pooling allocator and disabling the `memory-init-cow`.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在释放前未清除敏感信息
Source: CVE Program / CVE List V5
Vulnerability Title
Wasmtime 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Wasmtime是一个字节码联盟项目，它是一个独立的仅用于 WebAssembly 和 WASI 的 wasm 优化运行时。 Wasmtime 2.0.2之前的版本存在安全漏洞，该漏洞源于其池分配器中实例之间的数据泄漏。
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
bytecodealliance wasmtime >= 2.0.0, < 2.0.2 -

II. Public POCs for CVE-2022-39393

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III. Intelligence Information for CVE-2022-39393

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Vendor Advisories for CVE-2022-39393 (1)

Same Patch Batch · bytecodealliance · 2022-11-10 · 3 CVEs total

CVE-2022-39392 5.9 MEDIUM Wasmtime vulnerable to out of bounds read/write with zero-memory-pages configuration
CVE-2022-39394 3.8 LOW wasmtime_trap_code C API function has out of bounds write vulnerability

IV. Related Vulnerabilities

Same product: wasmtime
Same vendor: bytecodealliance
Same weakness: CWE-226

V. Comments for CVE-2022-39393

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