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CVE-2020-7767— Regular Expression Denial of Service (ReDoS)

Quick assessment

Affected
n/a express-validators
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.

express-validators是express-validators团队的一个用于验证的 express.js 中间件。 express-validators 存在安全漏洞，该漏洞源于验证特定设计的无效url时，验证器都容易受到正则表达式拒绝服务(ReDoS)的攻击。

CVSS 5.3 · Medium EPSS 1.64% · P76

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2020-7767

Vulnerability Information
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Vulnerability Title
Regular Expression Denial of Service (ReDoS)
Source: CVE Program / CVE List V5
Vulnerability Description
All versions of package express-validators are vulnerable to Regular Expression Denial of Service (ReDoS) when validating specifically-crafted invalid urls.
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
express-validators 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
express-validators是express-validators团队的一个用于验证的 express.js 中间件。 express-validators 存在安全漏洞，该漏洞源于验证特定设计的无效url时，验证器都容易受到正则表达式拒绝服务(ReDoS)的攻击。
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
- express-validators 0 ~ unspecified -

II. Public POCs for CVE-2020-7767

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III. Intelligence Information for CVE-2020-7767

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Vendor Advisories for CVE-2020-7767 (1)

Same Patch Batch · n/a · 2020-11-11 · 4 CVEs total

CVE-2020-7768 7.5 HIGH Prototype Pollution
CVE-2020-27523 Mersive Technologies Mersive Solstice-Pod 授权问题漏洞
CVE-2020-27524 Audi A7 MMI 2014 格式化字符串错误漏洞

IV. Related Vulnerabilities

Same vendor: n/a

V. Comments for CVE-2020-7767

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