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CVE-2021-45918— NHI’s health insurance web service component – Heap-based Buffer Overflow

Quick assessment

Affected
NHI health insurance web service component
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.

National Health Insurance（NHI）是中国的台湾的医疗保险计划健保卡。 National Health Insurance 存在安全漏洞，该漏洞源于对输入字符串长度的验证不足。远程攻击者可以利用该漏洞淹没为程序保留的内存空间，从而在未经身份验证的情况下终止服务，这需要重新启动系统才能恢复服务。

CVSS 7.5 · High EPSS 1.46% · P71
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I. Basic Information for CVE-2021-45918

Vulnerability Information
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Vulnerability Title
NHI’s health insurance web service component – Heap-based Buffer Overflow
Source: CVE Program / CVE List V5
Vulnerability Description
NHI’s health insurance web service component has insufficient validation for input string length, which can result in heap-based buffer overflow attack. A remote attacker can exploit this vulnerability to flood the memory space reserved for the program, in order to terminate service without authentication, which requires a system restart to recover service.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
堆缓冲区溢出
Source: CVE Program / CVE List V5
Vulnerability Title
National Health Insurance 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
National Health Insurance（NHI）是中国的台湾的医疗保险计划健保卡。 National Health Insurance 存在安全漏洞，该漏洞源于对输入字符串长度的验证不足。远程攻击者可以利用该漏洞淹没为程序保留的内存空间，从而在未经身份验证的情况下终止服务，这需要重新启动系统才能恢复服务。
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
NHI health insurance web service component 515BE7DE5BCE446177FEE8A6E0665093 -
NHI health insurance web service component 42fcc36541e716e23de77d5f325b186a -
NHI health insurance web service component 52EACB7CA2B4D0A5A869DF01079BF4D6 -
NHI health insurance web service component 52EACB7CA2B4D0A5A869DF01079BF4D6 -

II. Public POCs for CVE-2021-45918

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III. Intelligence Information for CVE-2021-45918

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Other References for CVE-2021-45918 (1)

IV. Related Vulnerabilities

Same vendor: NHI
Same weakness: CWE-122

V. Comments for CVE-2021-45918

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