Integer Overflow Vulnerability in Python
Summary
CVE-2017-1000158: CPython (aka Python) up to 2.7.13 is vulnerable to an integer overflow in the PyString_DecodeEscape function in stringobject.c, resulting in heap-based buffer overflow (and possible arbitrary code execution). Affects python across 2 version ranges.
< 2.7.14-r0
< ca079a3ea30098aff3197c559a0e32d42dda6d84
Fixed in 2.7.14-r0. How to fix ↓
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Background
Python is a popular programming language known for its simplicity and readability. It is widely used for various applications, including web development, data analysis, and artificial intelligence. The vulnerability, identified as CVE-2017-1000158, affects CPython (Python) versions up to 2.7.13. It is an integer overflow vulnerability in the PyString_DecodeEscape function in stringobject.c, leading to a heap-based buffer overflow and potential arbitrary code execution.
Vulnerability Detail
The integer overflow vulnerability in Python arises due to a flaw in the PyString_DecodeEscape function. By exploiting this vulnerability, an attacker can trigger a heap-based buffer overflow, potentially allowing them to execute arbitrary code on the affected system. This can lead to various consequences, including remote code execution, privilege escalation, and unauthorized access to sensitive information.
How To Fix
Minimum fixed version
2.7.14-r0
This is the first release that contains the fix.
sudo apk add --upgrade pythonTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
If immediate updating is not feasible, a temporary workaround is to avoid processing untrusted input using the PyString_DecodeEscape function. By refraining from utilizing this specific function, the risk of triggering the vulnerability can be mitigated. However, this workaround should only be considered as a temporary solution, and updating to the patched version is strongly recommended.
Conclusion
The integer overflow vulnerability in Python (CVE-2017-1000158) poses a significant risk to systems running affected versions. It is crucial to update Python to version 2.7.14-r0 or later to mitigate the vulnerability. By doing so, users can protect their systems from potential arbitrary code execution and other security risks. For further support and assistance in vulnerability remediation, please contact DevNack.com.
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FAQ
The vulnerability can potentially allow an attacker to execute arbitrary code on the affected system, leading to various consequences such as remote code execution, privilege escalation, and unauthorized access to sensitive information.
The vulnerability affects Python versions up to 2.7.13.
You can use the Vulert Playground at Vulert Scanner to check if your Python installation is affected by this vulnerability. Simply upload your package-lock.json file to the playground, and it will provide real-time monitoring and alerts for open-source vulnerabilities.
Yes, the CVSS score for this vulnerability is 9.8, indicating a critical severity level.
At the time of this report, there are no known public exploits specifically targeting this vulnerability. However, it is crucial to update Python to the patched version to prevent potential exploitation.
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