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CVE-2021-27439— TencentOS-tiny Integer Overflow or Wraparound

Quick assessment

Affected
TencentOS-tiny TencentOS-tiny
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.

Tencent OS-tiny是中国腾讯（Tencent）公司的一款面向物联网领域开发的实时操作系统。具有低功耗，低资源占用，模块化，安全可靠等特点，可有效提升物联网终端产品开发效率。 Tencent OS-tiny 3.1.0 版本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 1.46% · P71

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2021-27439

Vulnerability Information
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Vulnerability Title
TencentOS-tiny Integer Overflow or Wraparound
Source: CVE Program / CVE List V5
Vulnerability Description
TencentOS-tiny version 3.1.0 is vulnerable to integer wrap-around in function 'tos_mmheap_alloc incorrect calculation of effective memory allocation size. This improper memory assignment 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
Tencent OS-tiny 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Tencent OS-tiny是中国腾讯（Tencent）公司的一款面向物联网领域开发的实时操作系统。具有低功耗，低资源占用，模块化，安全可靠等特点，可有效提升物联网终端产品开发效率。 Tencent OS-tiny 3.1.0 版本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
TencentOS-tiny TencentOS-tiny 3.1.0 -

II. Public POCs for CVE-2021-27439

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III. Intelligence Information for CVE-2021-27439

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Vendor Advisories for CVE-2021-27439 (1)

IV. Related Vulnerabilities

Same weakness: CWE-190

V. Comments for CVE-2021-27439

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