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CVE-2020-26291— Hostname spoofing in URI.js

Quick assessment

Affected
medialize URI.js
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.

urijs是一个Javascript URL 变异库。 urijs 存在输入验证错误漏洞，该漏洞源于允许通过使用反斜杠（` @`）字符来欺骗主机名。 如果在安全决策中使用了主机名，则该决策可能不正确。 根据库的使用情况和攻击者的意图，影响可能包括允许/阻止列表绕过，开放重定向或其他不良行为。

CVSS 6.5 · Medium EPSS 1.69% · P75
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I. Basic Information for CVE-2020-26291

Vulnerability Information
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Vulnerability Title
Hostname spoofing in URI.js
Source: CVE Program / CVE List V5
Vulnerability Description
URI.js is a javascript URL mutation library (npm package urijs). In URI.js before version 1.19.4, the hostname can be spoofed by using a backslash (`\`) character followed by an at (`@`) character. If the hostname is used in security decisions, the decision may be incorrect. Depending on library usage and attacker intent, impacts may include allow/block list bypasses, SSRF attacks, open redirects, or other undesired behavior. For example the URL `https://expected-example.com\@observed-example.com` will incorrectly return `observed-example.com` if using an affected version. Patched versions correctly return `expected-example.com`. Patched versions match the behavior of other parsers which implement the WHATWG URL specification, including web browsers and Node's built-in URL class. Version 1.19.4 is patched against all known payload variants. Version 1.19.3 has a partial patch but is still vulnerable to a payload variant.]
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Medialize urijs 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
urijs是一个Javascript URL 变异库。 urijs 存在输入验证错误漏洞，该漏洞源于允许通过使用反斜杠（``）字符后跟一个at（`@`）字符来欺骗主机名。 如果在安全决策中使用了主机名，则该决策可能不正确。 根据库的使用情况和攻击者的意图，影响可能包括允许/阻止列表绕过，开放重定向或其他不良行为。
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
medialize URI.js < 1.19.4 -

II. Public POCs for CVE-2020-26291

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III. Intelligence Information for CVE-2020-26291

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Patches & Fixes for CVE-2020-26291 (1)

Vendor Advisories for CVE-2020-26291 (1)

Other References for CVE-2020-26291 (2)

IV. Related Vulnerabilities

Same product: URI.js
Same vendor: medialize
Same weakness: CWE-20

V. Comments for CVE-2020-26291

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