Critical DNS Rebinding Vulnerability in Django Package (CVE-2016-9014)
Summary
ALPINE-CVE-2016-9014: Django before 1.8.x before 1.8.16, 1.9.x before 1.9.11, and 1.10.x before 1.10.3, when settings.DEBUG is True, allow remote attackers to conduct DNS rebinding attacks by leveraging failure to validate the HTTP Host heade... Affects py-django versions < 1.8.16-r0. Fixed in 1.8.16-r0. How to fix ↓
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Background
Django is a high-level Python web framework that encourages rapid development and clean, pragmatic design. It is widely used for building web applications and is known for its robustness and scalability. The framework includes features such as an ORM, authentication, and an admin interface. However, certain versions of Django are vulnerable to a DNS rebinding attack when the DEBUG setting is enabled, allowing attackers to exploit the application by manipulating the HTTP Host header.
Vulnerability Detail
The vulnerability arises from Django's failure to validate the HTTP Host header against the settings.ALLOWED_HOSTS when settings.DEBUG is set to True. This oversight can allow remote attackers to conduct DNS rebinding attacks, potentially leading to unauthorized access to sensitive data or control over the application. The affected versions include Django before 1.8.x before 1.8.16, 1.9.x before 1.9.11, and 1.10.x before 1.10.3. The CVSS score for this vulnerability is 8.1, indicating a high severity level.
How To Fix
Minimum fixed version
1.8.16-r0
This is the first release that contains the fix.
sudo apk add --upgrade py-djangoTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
As a temporary workaround, consider disabling the DEBUG setting in your Django settings file by setting 'DEBUG = False'. This will prevent the vulnerability from being exploited until you can apply the necessary updates.
Conclusion
In summary, CVE-2016-9014 is a significant vulnerability affecting various versions of the Django package, allowing for potential DNS rebinding attacks. It is crucial to update to the patched versions or implement workarounds to protect your application from exploitation.
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FAQ
CVE-2016-9014 is a critical vulnerability in Django that allows remote attackers to conduct DNS rebinding attacks when the DEBUG setting is enabled.
You can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without requiring any signup.
The affected versions include Django before 1.8.x before 1.8.16, 1.9.x before 1.9.11, and 1.10.x before 1.10.3.
The CVSS score for this vulnerability is 8.1, indicating a high severity level.
If you cannot update immediately, ensure that the DEBUG setting is set to False in your Django settings file to mitigate the risk.
References
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