CVE-2021-33571

Publication date 2 June 2021

Last updated 24 July 2024

Ubuntu priority

Cvss 3 Severity Score

In Django 2.2 before 2.2.24, 3.x before 3.1.12, and 3.2 before 3.2.4, URLValidator, validate_ipv4_address, and validate_ipv46_address do not prohibit leading zero characters in octal literals. This may allow a bypass of access control that is based on IP addresses. (validate_ipv4_address and validate_ipv46_address are unaffected with Python 3.9.5+..) .

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
python-django	22.04 LTS jammy	Fixed 2:2.2.24-1
	21.10 impish	Fixed 2:2.2.24-1
	21.04 hirsute	Fixed 2:2.2.20-1ubuntu0.2
	20.10 groovy	Fixed 2:2.2.16-1ubuntu0.5
	20.04 LTS focal	Fixed 2:2.2.12-1ubuntu0.7
	18.04 LTS bionic	Not affected
	16.04 LTS xenial	Not affected
	14.04 LTS trusty	Not affected

Notes

mdeslaur

Python earlier than 3.8.0 is not vulnerable to CVE-2021-29921, so django in bionic and earlier do not require fixes

Severity score breakdown

Parameter	Value
Base score	7.5 · High
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	High
Availability impact	None
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

References

Related Ubuntu Security Notices (USN)

USN-4975-1
Django vulnerabilities
2 June 2021