SSRF in Djangoproject Django
CVE-2021-33571
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+..) .
Vulnerability class: SSRF (Server-Side Request Forgery)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.
EPSS exploit prediction
EPSS: 0.053 (92.3th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 92nd percentile — 92.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.052 · newest: 0.053 · change: +0.000
Affected products
- Djangoproject Django
- Fedoraproject Fedora — versions 35
Weakness classification (CWE)
Public proof-of-concept exploits
References
- docs.djangoproject.com/en/3.2/releases/security/ (Patch, Vendor Advisory)
- groups.google.com/g/django-announce/c/sPyjSKMi8Eo (Mailing List, Third Party Advisory)
- www.djangoproject.com/weblog/2021/jun/02/security-releases/ (Patch, Vendor Advisory)
- security.netapp.com/advisory/ntap-20210727-0004/ (Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- github.com/django/django/commit/f27c38ab5d90f68c9dd60cabef248a570c0be8fc
- github.com/django/django/commit/203d4ab9ebcd72fc4d6eb7398e66ed9e474e118e
- github.com/django/django/commit/9f75e2e562fa0c0482f3dde6fc7399a9070b4a3d
Frequently asked questions
- What is CVE-2021-33571?
- CVE-2021-33571 is a high-severity vulnerability in Djangoproject Django, classified under Server-Side Request Forgery (SSRF). CVSS score: 7.5/10. Published 2021-06-08.
- How severe is CVE-2021-33571?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2021-33571 known to be exploited?
- 4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.