CVEs-PoC/2020/CVE-2020-15225.md

### [CVE-2020-15225](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-15225)
![](https://img.shields.io/static/v1?label=Product&message=django-filter&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Vulnerability&message=CWE-681%3A%20Incorrect%20Conversion%20between%20Numeric%20Types&color=brighgreen)

### 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.

### POC

#### Reference
No PoCs from references.

#### Github
- https://github.com/ARPSyndicate/cvemon
- https://github.com/r4wr4m/DjangoFilter_DoS_POC