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CVE-2022-39394— wasmtime_trap_code C API function has out of bounds write vulnerability

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之前的版本存在缓冲区错误漏洞，该漏洞源于其wasmtime_trap_code C API函数存在越界写入。

CVSS 3.8 · Low EPSS 0.34% · P25

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2022-39394

Vulnerability Information
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Vulnerability Title
wasmtime_trap_code C API function has out of bounds write vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Wasmtime is a standalone runtime for WebAssembly. Prior to version 2.0.2, there is a bug in Wasmtime's C API implementation where the definition of the `wasmtime_trap_code` does not match its declared signature in the `wasmtime/trap.h` header file. This discrepancy causes the function implementation to perform a 4-byte write into a 1-byte buffer provided by the caller. This can lead to three zero bytes being written beyond the 1-byte location provided by the caller. This bug has been patched and users should upgrade to Wasmtime 2.0.2. This bug can be worked around by providing a 4-byte buffer casted to a 1-byte buffer when calling `wasmtime_trap_code`. Users of the `wasmtime` crate are not affected by this issue, only users of the C API function `wasmtime_trap_code` are affected.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存写
Source: CVE Program / CVE List V5
Vulnerability Title
Wasmtime 缓冲区错误漏洞
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之前的版本存在缓冲区错误漏洞，该漏洞源于其wasmtime_trap_code C API函数存在越界写入。
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 < 2.0.2 -

II. Public POCs for CVE-2022-39394

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III. Intelligence Information for CVE-2022-39394

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Patches & Fixes for CVE-2022-39394 (1)

Vendor Advisories for CVE-2022-39394 (1)

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

CVE-2022-39393 8.6 HIGH Wasmtime vulnerable to data leakage between instances in the pooling allocator
CVE-2022-39392 5.9 MEDIUM Wasmtime vulnerable to out of bounds read/write with zero-memory-pages configuration

IV. Related Vulnerabilities

Same product: wasmtime
Same vendor: bytecodealliance
Same weakness: CWE-787

V. Comments for CVE-2022-39394

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