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CVE-2022-35923— Inefficient Regular Expression Complexity in v8n

Quick assessment

Affected
imbrn v8n
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.

v8n是Bruno C. Couto个人开发者的一个 JavaScript 验证库。 v8n 1.5.1以前的版本存在安全漏洞，该漏洞源于其lowercase()和uppercase()正则表达式的复杂度较低可能导致拒绝服务攻击。

CVSS 7.5 · High EPSS 1.63% · P75

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking
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I. Basic Information for CVE-2022-35923

Vulnerability Information
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Vulnerability Title
Inefficient Regular Expression Complexity in v8n
Source: CVE Program / CVE List V5
Vulnerability Description
v8n is a javascript validation library. Versions of v8n prior to 1.5.1 were found to have an inefficient regular expression complexity in the `lowercase()` and `uppercase()` regex which could lead to a denial of service attack. In testing of the `lowercase()` function a payload of 'a' + 'a'.repeat(i) + 'A' with 32 leading characters took 29443 ms to execute. The same issue happens with uppercase(). Users are advised to upgrade. There are no known workarounds for 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:H
Source: CVE Program / CVE List V5
Vulnerability Type
未加控制的资源消耗(资源穷尽)
Source: CVE Program / CVE List V5
Vulnerability Title
v8n 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
v8n是Bruno C. Couto个人开发者的一个 JavaScript 验证库。 v8n 1.5.1以前的版本存在安全漏洞，该漏洞源于其lowercase()和uppercase()正则表达式的复杂度较低可能导致拒绝服务攻击。
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
imbrn v8n < 1.5.1 -

II. Public POCs for CVE-2022-35923

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III. Intelligence Information for CVE-2022-35923

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Patches & Fixes for CVE-2022-35923 (1)

Vendor Advisories for CVE-2022-35923 (2)

IV. Related Vulnerabilities

Same weakness: CWE-400

V. Comments for CVE-2022-35923

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