CVE-2021-33571: SSRF
First published: Mon May 31 2021(Updated: )
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+..) .
Credit: cve@mitre.org cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| pip/django | >=3.2.0<3.2.4 | 3.2.4 |
| pip/django | >=3.0.0<3.1.12 | 3.1.12 |
| pip/django | >=2.2.0<2.2.24 | 2.2.24 |
| Djangoproject Django | >=2.2<2.2.24 | |
| Djangoproject Django | >=3.0<3.1.12 | |
| Djangoproject Django | >=3.2<3.2.4 | |
| Fedoraproject Fedora | =35 | |
| redhat/python-django20 | <0:2.0.13-16.el8 | 0:2.0.13-16.el8 |
| redhat/python3-django | <0:2.2.24-1.el7 | 0:2.2.24-1.el7 |
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Reference Links
- https://nvd.nist.gov/vuln/detail/CVE-2021-33571
- https://docs.djangoproject.com/en/3.2/releases/security/
- https://groups.google.com/g/django-announce/c/sPyjSKMi8Eo
- https://www.djangoproject.com/weblog/2021/jun/02/security-releases/
- https://security.netapp.com/advisory/ntap-20210727-0004/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/B4SQG2EAF4WCI2SLRL6XRDJ3RPK3ZRDV/
- https://github.com/django/django/commit/203d4ab9ebcd72fc4d6eb7398e66ed9e474e118e
- https://github.com/django/django/commit/9f75e2e562fa0c0482f3dde6fc7399a9070b4a3d
- https://github.com/django/django/commit/f27c38ab5d90f68c9dd60cabef248a570c0be8fc
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/B4SQG2EAF4WCI2SLRL6XRDJ3RPK3ZRDV/
- https://github.com/advisories/GHSA-p99v-5w3c-jqq9 (Advisory)
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1967425
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1967426
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1967428
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1967427
- https://access.redhat.com/security/cve/CVE-2021-29921
- https://bugs.python.org/issue36384
- https://github.com/python/cpython/commit/e653d4d8e820a7a004ad399530af0135b45db27a
- https://github.com/python/cpython/pull/25099
- https://www.djangoproject.com/download/#supported-versions
- https://access.redhat.com/errata/RHSA-2021:3490
- https://access.redhat.com/security/cve/cve-2021-33571
- https://access.redhat.com/errata/RHSA-2021:4702
- https://access.redhat.com/errata/RHSA-2021:5070
- https://bugzilla.redhat.com/show_bug.cgi?id=1966253
- https://www.cve.org/CVERecord?id=CVE-2021-33571 https://nvd.nist.gov/vuln/detail/CVE-2021-33571 https://www.djangoproject.com/weblog/2021/jun/02/security-releases/
Parent vulnerabilities
(Appears in the following advisories)
Frequently Asked Questions
What is the vulnerability ID?
The vulnerability ID is CVE-2021-33571.
What is the severity of CVE-2021-33571?
The severity of CVE-2021-33571 is high with a CVSS score of 7.5.
What is the affected software?
The affected software is Django versions 2.2 before 2.2.24, 3.x before 3.1.12, and 3.2 before 3.2.4.
How does the vulnerability affect access control based on IP addresses?
The vulnerability allows a bypass of access control that is based on IP addresses.
How do I fix CVE-2021-33571?
To fix CVE-2021-33571, update Django to version 3.2.4, 3.1.12, or 2.2.24, depending on the installed version.
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