CVE-2020-7471: Django SQL Injection Vulnerability
Summary
CVE-2020-7471: Django 1.11 before 1.11.28, 2.2 before 2.2.10, and 3.0 before 3.0.3 allows SQL Injection if untrusted data is used as a StringAgg delimiter (e.g., in Django applications that offer downloads of data as a series of rows w... Affects django across 3 version ranges.
>= 1.11.0, < 1.11.28
>= 2.2.0, < 2.2.10
>= 3.0.0, < 3.0.3
Fixed in 1.11.28, 2.2.10 or 3.0.3, depending on the release line you run. How to fix ↓
Also tracked for
The same CVE-2020-7471 is tracked separately for each ecosystem and vendor. Its fix information is the same; the package and affected versions differ.
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Background
Django is a popular open-source web framework written in Python. It provides a high-level development environment for building secure and scalable web applications. The vulnerability identified as CVE-2020-7471 affects Django versions 1.11 to 1.11.28, 2.2 to 2.2.10, and 3.0 to 3.0.3. This vulnerability allows for SQL Injection when untrusted data is used as a StringAgg delimiter in Django applications that offer downloads of data as a series of rows with a user-specified column delimiter. By exploiting this vulnerability, an attacker can inject malicious SQL queries by passing a specially crafted delimiter to a contrib.postgres.aggregates.StringAgg instance, bypassing escaping mechanisms.
Vulnerability Detail
The vulnerability arises from a lack of proper input validation and sanitization when using untrusted data as a delimiter in the StringAgg class. This can lead to SQL Injection attacks, where an attacker can manipulate the SQL queries executed by the application. The impact of this vulnerability can be severe, allowing an attacker to extract sensitive data, modify or delete data, or even execute arbitrary commands on the underlying database server. It is crucial to address this vulnerability promptly to prevent potential data breaches and unauthorized access.
How To Fix
Fixed versions by release line
The minimum fixed version depends on the release line you run.
-
>= 1.11.0, < 1.11.281.11.28 -
>= 2.2.0, < 2.2.102.2.10 -
>= 3.0.0, < 3.0.33.0.3
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Workaround
As a temporary workaround, developers can manually validate and sanitize the delimiter input before passing it to the StringAgg class. This can be done by implementing a custom validation function that checks for any potentially malicious characters or patterns in the delimiter. Additionally, it is recommended to enforce strict input validation and sanitization practices throughout the application to mitigate the risk of other potential vulnerabilities.
Conclusion
The Django SQL Injection vulnerability (CVE-2020-7471) poses a significant risk to applications utilizing affected versions of Django. It is crucial to promptly upgrade to the patched versions and implement proper input validation and sanitization practices to prevent potential SQL Injection attacks. For further assistance and support in vulnerability remediation, please contact DevNack.com.
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FAQ
The vulnerability allows for SQL Injection attacks, which can lead to unauthorized access, data manipulation, and potential data breaches.
You can use the Vulert Playground at Vulert Scanner to check if your application is affected by this vulnerability. Simply upload your package-lock.json file to the playground, and it will analyze and alert you if any open-source vulnerabilities, including CVE-2020-7471, are detected.
At the time of this report, there are no known public exploits for this vulnerability. However, it is crucial to address it promptly to prevent potential exploitation.
Yes, patches have been released to address this vulnerability. It is recommended to upgrade Django to the latest patched version as mentioned in the 'how_to_fix' section.
While implementing strict input validation is essential, it is not sufficient to mitigate this vulnerability entirely. Upgrading to the patched versions of Django is necessary to ensure the proper fix is in place.
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