Arbitrary Code Execution Vulnerability in Tablib Package
Summary
CVE-2017-2810: An exploitable vulnerability exists in the Databook loading functionality of Tablib 0.11.4. Affects python-tablib versions < 0.9.11-3. Fixed in 0.9.11-3. How to fix ↓
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Background
Tablib is a popular Python library used for data serialization and import/export in various formats such as Excel, JSON, and YAML. It provides a simple interface for managing datasets and is widely utilized in data analysis and reporting applications. However, a critical vulnerability has been identified in version 0.11.4, which allows for the execution of arbitrary Python commands through malicious YAML files.
Vulnerability Detail
The vulnerability, identified as CVE-2017-2810, arises from the Databook loading functionality in Tablib. When a YAML file is loaded, it can contain embedded Python code that gets executed, leading to potential command execution on the host system. This flaw can be exploited by an attacker who crafts a malicious YAML file, allowing them to execute arbitrary commands, which could compromise the integrity and security of the application and the system it runs on.
How To Fix
Minimum fixed version
0.9.11-3
This is the first release that contains the fix.
sudo apt-get install --only-upgrade python-tablibTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
If upgrading is not immediately possible, a temporary workaround is to avoid loading YAML files from untrusted sources. Additionally, consider using alternative serialization formats that do not allow for code execution, such as JSON.
Conclusion
The CVE-2017-2810 vulnerability in the Tablib package poses a significant risk due to its ability to execute arbitrary code through malicious YAML files. Users are strongly advised to upgrade to a secure version of the package or implement workarounds to mitigate the risk. Regular monitoring for vulnerabilities using tools like Vulert can help maintain application security.
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FAQ
CVE-2017-2810 is a vulnerability in the Tablib package that allows for arbitrary code execution through malicious YAML files.
You can use Vulert's playground at Vulert Scanner to check if your application is affected by this vulnerability without needing to sign up.
Exploiting this vulnerability can lead to unauthorized command execution, potentially compromising the system's security and integrity.
If upgrading is not feasible, avoid loading YAML files from untrusted sources and consider using safer serialization formats.
The CVSS score for CVE-2017-2810 is 9.8, indicating a critical level of severity.
References
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