Arbitrary Command Execution Vulnerability in python-gnupg Package
Summary
CVE-2013-7323: python-gnupg before 0.3.5 allows context-dependent attackers to execute arbitrary commands via shell metacharacters in unspecified vectors. Affects python-gnupg versions < 0.3.6-1. Fixed in 0.3.6-1. How to fix ↓
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Background
The python-gnupg package is a Python wrapper for GnuPG, allowing developers to integrate GPG encryption and decryption functionalities into their applications. It is widely used for secure data handling and cryptographic operations. However, prior to version 0.3.5, the package was susceptible to a vulnerability that could allow attackers to execute arbitrary commands through shell metacharacters, compromising the security of applications relying on this package.
Vulnerability Detail
The vulnerability, identified as CVE-2013-7323, arises from improper handling of user input in the python-gnupg package. Context-dependent attackers can exploit this flaw by injecting shell metacharacters into unspecified vectors, leading to arbitrary command execution. This could result in unauthorized access to system resources, data breaches, or further exploitation of the affected system. The vulnerability affects multiple Debian ecosystems, including versions 11, 12, and 13, and was introduced in versions prior to 0.3.5.
How To Fix
Minimum fixed version
0.3.6-1
This is the first release that contains the fix.
sudo apt-get install --only-upgrade python-gnupgTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
If upgrading is not immediately feasible, a temporary workaround involves sanitizing user inputs to prevent the injection of shell metacharacters. This can be achieved by implementing input validation and escaping mechanisms in the application code that utilizes the python-gnupg package.
Conclusion
The CVE-2013-7323 vulnerability in the python-gnupg package poses a significant risk by allowing arbitrary command execution through shell metacharacters. It is crucial for users to upgrade to version 0.3.6-1 or later to mitigate this risk. Additionally, implementing input validation can serve as a temporary measure until an upgrade is possible.
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FAQ
CVE-2013-7323 is a vulnerability in the python-gnupg package that allows attackers to execute arbitrary commands via shell metacharacters.
Versions of python-gnupg prior to 0.3.5 are affected by this vulnerability.
You can use Vulert's playground at Vulert Scanner to check if your application is affected by this vulnerability without any signup.
Exploitation of this vulnerability can lead to unauthorized command execution, data breaches, and potential compromise of the affected system.
Yes, you can implement input validation and sanitization to prevent the injection of shell metacharacters as a temporary workaround.
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