CVE-2020-15225
Potential DoS with NumberFilter conversion to integer values.
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.
How to fix CVE-2020-15225
To remediate CVE-2020-15225, upgrade the affected package to a fixed version below.
- —upgrade to 2.4.0-1 or later
- —upgrade to 2.4.0 or later
- —upgrade to 340cf7a23a2b3dcd7183f6a0d6c383e85b130d2b or later
Is CVE-2020-15225 being exploited?
Low — EPSS is 0.2%, meaning exploitation activity has not been observed at scale.
Affected packages (3)
- from 0, < 2.4.0-1
- from 0, < 2.4.0
- from 0, < 340cf7a23a2b3dcd7183f6a0d6c383e85b130d2b | from 0, < 2.4.0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N |
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |