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CVE-2020-15225— Denial of Service vulnerability in django-filter

Quick assessment

Affected
carltongibson django-filter
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.

Django是Django基金会的一套基于Python语言的开源Web应用框架。该框架包括面向对象的映射器、视图系统、模板系统等。 Django-filter 2.4.0之前版本存在安全漏洞，该漏洞源于受到恶意输入的DoS的影响。

CVSS 7.5 · High EPSS 1.80% · P78

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking
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I. Basic Information for CVE-2020-15225

Vulnerability Information
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Vulnerability Title
Denial of Service vulnerability in django-filter
Source: CVE Program / CVE List V5
Vulnerability Description
django-filter is a generic system for filtering Django QuerySets based on user selections. In django-filter before version 2.4.0, automatically generated `NumberFilter` instances, whose value was later converted to an integer, were subject to potential DoS from maliciously input using exponential format with sufficiently large exponents. Version 2.4.0+ applies a `MaxValueValidator` with a a default `limit_value` of 1e50 to the form field used by `NumberFilter` instances. In addition, `NumberFilter` implements the new `get_max_validator()` which should return a configured validator instance to customise the limit, or else `None` to disable the additional validation. Users may manually apply an equivalent validator if they are not able to upgrade.
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
数值类型间的不正确转换
Source: CVE Program / CVE List V5
Vulnerability Title
Django 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Django是Django基金会的一套基于Python语言的开源Web应用框架。该框架包括面向对象的映射器、视图系统、模板系统等。 Django-filter 2.4.0之前版本存在安全漏洞，该漏洞源于受到恶意输入的DoS的影响。
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
carltongibson django-filter < 2.4.0 -

II. Public POCs for CVE-2020-15225

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III. Intelligence Information for CVE-2020-15225

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Vendor Advisories for CVE-2020-15225 (2)

Mailing List Discussions for CVE-2020-15225 (2)

Other References for CVE-2020-15225 (2)

IV. Related Vulnerabilities

Same weakness: CWE-681

V. Comments for CVE-2020-15225

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