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CVE-2021-3733

Quick assessment

Affected
n/a python
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.

Python是Python基金会的一套开源的、面向对象的程序设计语言。该语言具有可扩展、支持模块和包、支持多种平台等特点。 python urllib的AbstractBasicAuthHandler类中存在资源管理错误漏洞，该漏洞源于产品中为能正确处理RCFS（正则表达式拒绝服务）。攻击者可通过该漏洞导致拒绝服务。

AI Predicted 5.3 Difficulty: Moderate EPSS 4.67% · P91
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I. Basic Information for CVE-2021-3733

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
There's a flaw in urllib's AbstractBasicAuthHandler class. An attacker who controls a malicious HTTP server that an HTTP client (such as web browser) connects to, could trigger a Regular Expression Denial of Service (ReDOS) during an authentication request with a specially crafted payload that is sent by the server to the client. The greatest threat that this flaw poses is to application availability.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
未加控制的资源消耗(资源穷尽)
Source: CVE Program / CVE List V5
Vulnerability Title
Python 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Python是Python基金会的一套开源的、面向对象的程序设计语言。该语言具有可扩展、支持模块和包、支持多种平台等特点。 python urllib的AbstractBasicAuthHandler类中存在资源管理错误漏洞，该漏洞源于产品中为能正确处理RCFS（正则表达式拒绝服务）。攻击者可通过该漏洞导致拒绝服务。
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
- python Fixed in python v3.6.14, python v3.7.11, python v3.8.10, python v3.9.5. -

II. Public POCs for CVE-2021-3733

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III. Intelligence Information for CVE-2021-3733

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Patches & Fixes for CVE-2021-3733 (2)

Vendor Advisories for CVE-2021-3733 (3)

Mailing List Discussions for CVE-2021-3733 (2)

Other References for CVE-2021-3733 (1)

Same Patch Batch · n/a · 2022-03-07 · 46 CVEs total

CVE-2022-25217 Phicomm 多款产品信任管理问题漏洞
CVE-2022-25213 Phicomm 多款产品信任管理问题漏洞
CVE-2022-25219 Phicomm 多款产品安全漏洞
CVE-2021-34340 Ming 缓冲区错误漏洞
CVE-2021-34339 Ming 缓冲区错误漏洞
CVE-2021-34338 Ming 缓冲区错误漏洞
CVE-2022-26662 Tryton 安全漏洞
CVE-2022-26661 Tryton 代码问题漏洞
CVE-2021-34341 Ming 缓冲区错误漏洞
CVE-2022-25218 多款PHICOMM产品加密问题漏洞
CVE-2022-25215 Phicomm多款产品安全漏洞
CVE-2022-25214 Phicomm多款产品安全漏洞
CVE-2022-25243 HashiCorp Vault 信任管理问题漏洞
CVE-2022-25244 HashiCorp Vault 安全漏洞
CVE-2020-36517 Home Assistant 安全漏洞
CVE-2021-41657 SmartBear CodeCollaborator 输入验证错误漏洞
CVE-2021-43970 Quicklert 代码问题漏洞
CVE-2021-43969 Quicklert SQL注入漏洞
CVE-2022-22834 OverIT Geocall 安全漏洞
CVE-2022-22835 OverIT Geocall 代码问题漏洞

Showing top 20 of 46 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: python
Same vendor: n/a
Same weakness: CWE-400

V. Comments for CVE-2021-3733

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