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CVE-2021-23388— Regular Expression Denial of Service (ReDoS)

Quick assessment

Affected
n/a forms
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.

caolan forms是开源的一个创建、解析和验证表单的简单程序。 Forms 中存在输入验证错误漏洞，该漏洞源于。攻击者可通过该漏洞在电子邮件验证时发起正则表达式拒绝服务(ReDoS)的攻击。 以下产品及版本受到影响： Forms 1.2.1 之前版本、Forms 1.3.0 至 1.3.2版本。

CVSS 5.3 · Medium EPSS 1.65% · P76

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking
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I. Basic Information for CVE-2021-23388

Vulnerability Information
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Vulnerability Title
Regular Expression Denial of Service (ReDoS)
Source: CVE Program / CVE List V5
Vulnerability Description
The package forms before 1.2.1, from 1.3.0 and before 1.3.2 are vulnerable to Regular Expression Denial of Service (ReDoS) via email validation.
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
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Forms 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
caolan forms是开源的一个创建、解析和验证表单的简单程序。 Forms 中存在输入验证错误漏洞，该漏洞源于。攻击者可通过该漏洞在电子邮件验证时发起正则表达式拒绝服务(ReDoS)的攻击。 以下产品及版本受到影响： Forms 1.2.1 之前版本、Forms 1.3.0 至 1.3.2版本。
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
- forms unspecified ~ 1.2.1 -

II. Public POCs for CVE-2021-23388

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III. Intelligence Information for CVE-2021-23388

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Patches & Fixes for CVE-2021-23388 (2)

Vendor Advisories for CVE-2021-23388 (1)

Same Patch Batch · n/a · 2021-05-31 · 3 CVEs total

CVE-2020-10666 FreePBX 命令注入漏洞
CVE-2021-33790 RebornCore library 代码问题漏洞

IV. Related Vulnerabilities

Same product: forms
Same vendor: n/a

V. Comments for CVE-2021-23388

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