From f27c38ab5d90f68c9dd60cabef248a570c0be8fc Mon Sep 17 00:00:00 2001 From: Mariusz Felisiak Date: Tue, 25 May 2021 11:57:59 +0200 Subject: [2.2.x] Fixed CVE-2021-33571 -- Prevented leading zeros in IPv4 addresses. validate_ipv4_address() was affected only on Python < 3.9.5, see [1]. URLValidator() uses a regular expressions and it was affected on all Python versions. [1] https://bugs.python.org/issue36384 --- docs/releases/2.2.24.txt | 13 +++++++++++++ 1 file changed, 13 insertions(+) (limited to 'docs') diff --git a/docs/releases/2.2.24.txt b/docs/releases/2.2.24.txt index 9bcf7037c4..1064fc53a0 100644 --- a/docs/releases/2.2.24.txt +++ b/docs/releases/2.2.24.txt @@ -17,3 +17,16 @@ the existence but also the file contents would have been exposed. As a mitigation, path sanitation is now applied and only files within the template root directories can be loaded. + +CVE-2021-33571: Possible indeterminate SSRF, RFI, and LFI attacks since validators accepted leading zeros in IPv4 addresses +=========================================================================================================================== + +:class:`~django.core.validators.URLValidator`, +:func:`~django.core.validators.validate_ipv4_address`, and +:func:`~django.core.validators.validate_ipv46_address` didn't prohibit leading +zeros in octal literals. If you used such values you could suffer from +indeterminate SSRF, RFI, and LFI attacks. + +:func:`~django.core.validators.validate_ipv4_address` and +:func:`~django.core.validators.validate_ipv46_address` validators were not +affected on Python 3.9.5+. -- cgit v1.3