Vulnerability Details : CVE-2021-45918
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.
Vulnerability category: OverflowInput validation
Products affected by CVE-2021-45918
- cpe:2.3:a:nhi:health_insurance_web_service_component:-:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-45918
0.19%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 56 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-45918
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
7.8
|
HIGH | AV:N/AC:L/Au:N/C:N/I:N/A:C |
10.0
|
6.9
|
NIST | |
|
7.5
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
3.9
|
3.6
|
NIST | |
|
7.5
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
3.9
|
3.6
|
TWCERT/CC |
CWE ids for CVE-2021-45918
-
A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().Assigned by: twcert@cert.org.tw (Secondary)
-
The product writes data past the end, or before the beginning, of the intended buffer.Assigned by: nvd@nist.gov (Primary)
-
The product receives input that is expected to specify a quantity (such as size or length), but it does not validate or incorrectly validates that the quantity has the required properties.Assigned by: nvd@nist.gov (Primary)
References for CVE-2021-45918
-
https://www.twcert.org.tw/tw/cp-132-6227-eaf49-1.html
TWCERT/CC台灣電腦網路危機處理暨協調中心|企業資安通報協處|資安情資分享|漏洞通報|資安聯盟|資安電子報-健保卡網路服務元件 - Heap-based Buffer OverflowThird Party Advisory
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