CVE-2022-4996— mruby bigint.c udiv floating point comparison with incorrect operator
Quick assessment
Affected
n/a mruby
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.
mruby是mruby团队开源的一款Ruby语言轻量实现。 mruby 3.1.0版本存在处理逻辑错误漏洞，该漏洞源于bigint.c文件中的udiv函数存在浮点比较运算符错误，可能导致远程攻击。
Possible ATT&CK Techniques 1 AI
T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2022-4996
Vulnerability Information
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Vulnerability Title
mruby bigint.c udiv floating point comparison with incorrect operator
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw has been found in mruby 3.1.0. Affected is the function udiv of the file bigint.c. Executing a manipulation can lead to floating point comparison with incorrect operator. It is possible to launch the attack remotely. The exploit has been published and may be used. It is best practice to apply a patch to resolve this issue.
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:L
Source: CVE Program / CVE List V5
Vulnerability Type
使用不正确的比较运算符比较浮点值
Source: CVE Program / CVE List V5
Vulnerability Title
mruby 处理逻辑错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
mruby是mruby团队开源的一款Ruby语言轻量实现。 mruby 3.1.0版本存在处理逻辑错误漏洞，该漏洞源于bigint.c文件中的udiv函数存在浮点比较运算符错误，可能导致远程攻击。
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 |
|---|---|---|---|---|
| - | mruby | 3.1.0 |
cpe:2.3:a:mruby:mruby:*:*:*:*:*:*:*:*
|
|
II. Public POCs for CVE-2022-4996
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2022-4996 (2)
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CVE-2022-4996 mruby bigint.c udiv floating point comparison with incorrect operator vdb-entry technical-description
News Coverage for CVE-2022-4996 (2)
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🔗 CVE-2022-4996 in mruby third-party-advisory
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🔗 Submit #877513: mruby 3.1.0 Floating Point Exception third-party-advisory
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IV. Related Vulnerabilities
V. Comments for CVE-2022-4996
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