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CVE-2021-37714— Crafted input may cause the jsoup HTML and XML parser to get stuck, timeout, or throw unchecked exceptions

Quick assessment

Affected
jhy jsoup
Exploitation
High exploitation probability; assess promptly
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Github jsoup是一个用于处理真实世界 HTML 的 Java 库。 Github jsoup 1.14.2之前版本存在安全漏洞，该漏洞可导致jsoup拒绝服务。

CVSS 7.5 · High EPSS 6.87% · P94

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2021-37714

Vulnerability Information
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Vulnerability Title
Crafted input may cause the jsoup HTML and XML parser to get stuck, timeout, or throw unchecked exceptions
Source: CVE Program / CVE List V5
Vulnerability Description
jsoup is a Java library for working with HTML. Those using jsoup versions prior to 1.14.2 to parse untrusted HTML or XML may be vulnerable to DOS attacks. If the parser is run on user supplied input, an attacker may supply content that causes the parser to get stuck (loop indefinitely until cancelled), to complete more slowly than usual, or to throw an unexpected exception. This effect may support a denial of service attack. The issue is patched in version 1.14.2. There are a few available workarounds. Users may rate limit input parsing, limit the size of inputs based on system resources, and/or implement thread watchdogs to cap and timeout parse runtimes.
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
不可达退出条件的循环(无限循环)
Source: CVE Program / CVE List V5
Vulnerability Title
Github jsoup 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Github jsoup是一个用于处理真实世界 HTML 的 Java 库。 Github jsoup 1.14.2之前版本存在安全漏洞，该漏洞可导致jsoup拒绝服务。
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
jhy jsoup < 1.14.2 -

II. Public POCs for CVE-2021-37714

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III. Intelligence Information for CVE-2021-37714

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Vendor Advisories for CVE-2021-37714 (5)

Mailing List Discussions for CVE-2021-37714 (5)

Other References for CVE-2021-37714 (2)

IV. Related Vulnerabilities

Same product: jsoup
Same vendor: jhy
Same weakness: CWE-835

V. Comments for CVE-2021-37714

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