GHSA-p99v-5w3c-jqq9 BIT-django-2021-33571 CVE-2021-33571 PYSEC-2021-99
Django Access Control Bypass possibly leading to SSRF, RFI, and LFI attacks
- Severity
- 0.0 / 10
- High · CVSS 4.0
- Exploit chance (EPSS)
- 5.26%
- Chance of exploitation in the next 30 days. Higher than 92.55% of scored vulnerabilities.
- Known exploited
- No
- Not in CISA's catalog
- Weakness
- CWE-918 Server-Side Request Forgery (SSRF)
- Fix
2.2.24- Upgrade django to this version or later
Description
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+..) .
Affected versions
PyPI
| Package | Vulnerable | Fixed in |
|---|---|---|
| django | >= 2.2a1, < 2.2.24 |
2.2.24 |
| django | >= 3.0a1, < 3.1.12 |
3.1.12 |
| django | >= 3.2a1, < 3.2.4 |
3.2.4 |
| django | >= 2.2, < 2.2.24>= 3.0, < 3.1.12>= 3.2, < 3.2.4 |
2.2.243.1.123.2.4 |
How to fix
Move to the fixed version or later with your package manager, update the lockfile, and run your tests. If the package only arrives through another dependency, upgrade that dependency first. If none of its releases pulls a fixed version yet, force the version with your package manager's override.
django PyPI → 2.2.24
- pip
pip install --upgrade "django>=2.2.24"- poetry
poetry add "django>=2.2.24"- uv
uv add "django>=2.2.24"
Severity breakdown
CVSS 4.0 0.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
- Attack vector
- Network
- Attack complexity
- Low
- Attack requirements
- None
- Privileges required
- None
- User interaction
- None
- Confidentiality (vulnerable system)
- None
- Integrity (vulnerable system)
- High
- Availability (vulnerable system)
- None
- Confidentiality (subsequent systems)
- None
- Integrity (subsequent systems)
- None
- Availability (subsequent systems)
- None
CVSS 3.1 7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- High
- Availability
- None
Weakness
CWE-918: Server-Side Request Forgery (SSRF)
The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.
References
Advisories
Write-ups
Packages
Other links
- github.com/django/django/commit/203d4ab9ebcd72fc4d6eb7398e66ed9e474e118e
- github.com/django/django/commit/9f75e2e562fa0c0482f3dde6fc7399a9070b4a3d
- github.com/django/django/commit/f27c38ab5d90f68c9dd60cabef248a570c0be8fc
- docs.djangoproject.com/en/3.2/releases/security
- github.com/pypa/advisory-database/tree/main/vulns/django/PYSEC-2021-99.yaml
- groups.google.com/g/django-announce/c/sPyjSKMi8Eo
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/B4S…
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/B4SQG…
- security.netapp.com/advisory/ntap-20210727-0004
- djangoproject.com/weblog/2021/jun/02/security-releases
- docs.djangoproject.com/en/3.2/releases/security
Timeline
- Published
- Last updated by the source
- Latest EPSS score
Related advisories
| Advisory | Severity | Why it's related |
|---|---|---|
| GHSA-q238-5cxm-5c9h Django GeoDjango vulnerable to denial of service through deeply nested geometry collections | Medium | Also affects django |
| GHSA-wvqv-fj8w-qmhm Django GeoDjango spatial lookups allow file writes and outbound requests through GDAL raster parsing | High | Also affects django |
| GHSA-8qcx-xf44-272x Django: DomainNameValidator permits newline characters that may enable HTTP header injection | Medium | Also affects django |
| GHSA-crhf-3pfg-w68w Django: GDALRaster may over-read heap memory when constructed from bytes | Medium | Also affects django |
| GHSA-3h9f-r86x-qvjx Django: cache middleware may expose private responses when unrelated request cookies are present | Medium | Also affects django |
| GHSA-8cjm-8mp7-r2xf Django: UpdateCacheMiddleware may disclose cached responses due to case-sensitive Cache-Control handling | Medium | Also affects django |
| GHSA-mm6v-q8q9-pgcf Django fails to prevent reuse of a partially-initialized connection after a failed `STARTTLS` handshake | Low | Also affects django |
| GHSA-h7pc-vwp9-298g Django: signed cookies are vulnerable to salt namespace collisions | Medium | Also affects django |
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