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CVE-2021-27435— ARM mbed Integer Overflow or Wraparound

Quick assessment

Affected
ARM mbed
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.

ARM Mbed OS是英国ARM公司的一套专用于物联网的开源嵌入式操作系统。 Arm mbed 6.3.0 存在输入验证错误漏洞，该漏洞源于不正确的内存分配可能导致任意的内存分配，从而导致意外的行为，如崩溃或远程代码注入执行。

CVSS 7.3 · High EPSS 1.74% · P76
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I. Basic Information for CVE-2021-27435

Vulnerability Information
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Vulnerability Title
ARM mbed Integer Overflow or Wraparound
Source: CVE Program / CVE List V5
Vulnerability Description
ARM mbed product Version 6.3.0 is vulnerable to integer wrap-around in malloc_wrapper function, which can lead to arbitrary memory allocation, resulting in unexpected behavior such as a crash or a remote code injection/execution.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
整数溢出或超界折返
Source: CVE Program / CVE List V5
Vulnerability Title
ARM Mbed OS 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
ARM Mbed OS是英国ARM公司的一套专用于物联网的开源嵌入式操作系统。 Arm mbed 6.3.0 存在输入验证错误漏洞，该漏洞源于不正确的内存分配可能导致任意的内存分配，从而导致意外的行为，如崩溃或远程代码注入执行。
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
ARM mbed 6.3.0 -

II. Public POCs for CVE-2021-27435

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III. Intelligence Information for CVE-2021-27435

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Patches & Fixes for CVE-2021-27435 (1)

Vendor Advisories for CVE-2021-27435 (1)

Same Patch Batch · ARM · 2022-05-03 · 3 CVEs total

CVE-2021-27431 7.3 HIGH ARM CMSIS RTOS2 Integer Overflow or Wraparound
CVE-2021-27433 7.3 HIGH ARM mbed-ualloc memory library Integer Overflow or Wraparound

IV. Related Vulnerabilities

Same vendor: ARM
Same weakness: CWE-190

V. Comments for CVE-2021-27435

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