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CVE-2021-43805— ReDos vulnerability on guest checkout email validation

Quick assessment

Affected
solidusio solidus
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.

Solidus是一套开源的电子商务系统。 Solidus 存在安全漏洞，该漏洞源于软件在用于验证客人订单的电子邮件的正则表达式可以通过a.a.a这样的片段进行指数回溯，攻击者可以在客人结帐期间利用该漏洞实现拒绝服务攻击。

CVSS 7.5 · High EPSS 1.40% · P71

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2021-43805

Vulnerability Information
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Vulnerability Title
ReDos vulnerability on guest checkout email validation
Source: CVE Program / CVE List V5
Vulnerability Description
Solidus is a free, open-source ecommerce platform built on Rails. Versions of Solidus prior to 3.1.4, 3.0.4, and 2.11.13 have a denial of service vulnerability that could be exploited during a guest checkout. The regular expression used to validate a guest order's email was subject to exponential backtracking through a fragment like `a.a.` Versions 3.1.4, 3.0.4, and 2.11.13 have been patched to use a different regular expression. The maintainers added a check for email addresses that are no longer valid that will print information about any affected orders that exist. If a prompt upgrade is not an option, a workaround is available. It is possible to edit the file `config/application.rb` manually (with code provided by the maintainers in the GitHub Security Advisory) to check email validity.
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
CWE-1333
Source: CVE Program / CVE List V5
Vulnerability Title
Solidus 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Solidus是一套开源的电子商务系统。 Solidus 存在安全漏洞，该漏洞源于软件在用于验证客人订单的电子邮件的正则表达式可以通过a.a.a这样的片段进行指数回溯，攻击者可以在客人结帐期间利用该漏洞实现拒绝服务攻击。
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
solidusio solidus >= 3.1.0, < 3.1.4 -

II. Public POCs for CVE-2021-43805

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III. Intelligence Information for CVE-2021-43805

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Patches & Fixes for CVE-2021-43805 (1)

Vendor Advisories for CVE-2021-43805 (1)

IV. Related Vulnerabilities

Same product: solidus
Same vendor: solidusio
Same weakness: CWE-1333

V. Comments for CVE-2021-43805

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