CVE-2021-3177 Report - Details, Severity, & Advisories
Twingate Team
•
Jul 4, 2024
What is CVE-2021-3177?
CVE-2021-3177 is a critical security vulnerability affecting Python 3.x through 3.9.1. It involves a buffer overflow in the PyCArg\_repr function in \_ctypes/callproc.c, which may lead to remote code execution in certain Python applications that accept floating-point numbers as untrusted input. This issue occurs because the sprintf function is used unsafely. Systems running Python 3.x through 3.9.1, including various software configurations and operating systems, are potentially at risk.
Who is impacted by CVE-2021-3177?
The CVE-2021-3177 vulnerability affects users of Python versions 3.x through 3.9.1, including those who use applications that accept floating-point numbers as untrusted input. Specifically, the affected versions are Python 3.6.0 to 3.6.12, Python 3.7.0 to 3.7.9, Python 3.8.0 to 3.8.7, Python 3.9.0 to 3.9.1, and Python 3.10. This vulnerability may lead to remote code execution in certain Python applications, posing a security risk for those using the affected versions.
What to do if CVE-2021-3177 affected you
If you're affected by the CVE-2021-3177 vulnerability, it's crucial to take action to protect your systems. Here's a simplified list of steps to follow:
Upgrade your Python version to a patched release (e.g., Python 3.5.3-1+deb9u4 for Debian 9 stretch).
Apply recommended patches or updates, such as the merged pull requests mentioned in the Python tracker.
Stay informed about security updates and advisories, like those provided by Debian LTS.
Is this in CISA’s Known Exploited Vulnerabilities Catalog?
The CVE-2021-3177 vulnerability is not listed in CISA's Known Exploited Vulnerabilities Catalog. This critical security issue affects Python 3.x through 3.9.1 and may lead to remote code execution in certain applications.
Weakness Enumeration
The weakness enumeration for this vulnerability is categorized as CWE-120, which involves a buffer overflow in Python 3.x through 3.9.1 due to unsafe usage of the sprintf function.
Learn More
For a comprehensive understanding of its description, severity, technical details, and affected software configurations, refer to the National Vulnerability Database and the sources listed below.
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CVE-2021-3177 Report - Details, Severity, & Advisories
Twingate Team
•
Jul 4, 2024
What is CVE-2021-3177?
CVE-2021-3177 is a critical security vulnerability affecting Python 3.x through 3.9.1. It involves a buffer overflow in the PyCArg\_repr function in \_ctypes/callproc.c, which may lead to remote code execution in certain Python applications that accept floating-point numbers as untrusted input. This issue occurs because the sprintf function is used unsafely. Systems running Python 3.x through 3.9.1, including various software configurations and operating systems, are potentially at risk.
Who is impacted by CVE-2021-3177?
The CVE-2021-3177 vulnerability affects users of Python versions 3.x through 3.9.1, including those who use applications that accept floating-point numbers as untrusted input. Specifically, the affected versions are Python 3.6.0 to 3.6.12, Python 3.7.0 to 3.7.9, Python 3.8.0 to 3.8.7, Python 3.9.0 to 3.9.1, and Python 3.10. This vulnerability may lead to remote code execution in certain Python applications, posing a security risk for those using the affected versions.
What to do if CVE-2021-3177 affected you
If you're affected by the CVE-2021-3177 vulnerability, it's crucial to take action to protect your systems. Here's a simplified list of steps to follow:
Upgrade your Python version to a patched release (e.g., Python 3.5.3-1+deb9u4 for Debian 9 stretch).
Apply recommended patches or updates, such as the merged pull requests mentioned in the Python tracker.
Stay informed about security updates and advisories, like those provided by Debian LTS.
Is this in CISA’s Known Exploited Vulnerabilities Catalog?
The CVE-2021-3177 vulnerability is not listed in CISA's Known Exploited Vulnerabilities Catalog. This critical security issue affects Python 3.x through 3.9.1 and may lead to remote code execution in certain applications.
Weakness Enumeration
The weakness enumeration for this vulnerability is categorized as CWE-120, which involves a buffer overflow in Python 3.x through 3.9.1 due to unsafe usage of the sprintf function.
Learn More
For a comprehensive understanding of its description, severity, technical details, and affected software configurations, refer to the National Vulnerability Database and the sources listed below.
Rapidly implement a modern Zero Trust network that is more secure and maintainable than VPNs.
CVE-2021-3177 Report - Details, Severity, & Advisories
Twingate Team
•
Jul 4, 2024
What is CVE-2021-3177?
CVE-2021-3177 is a critical security vulnerability affecting Python 3.x through 3.9.1. It involves a buffer overflow in the PyCArg\_repr function in \_ctypes/callproc.c, which may lead to remote code execution in certain Python applications that accept floating-point numbers as untrusted input. This issue occurs because the sprintf function is used unsafely. Systems running Python 3.x through 3.9.1, including various software configurations and operating systems, are potentially at risk.
Who is impacted by CVE-2021-3177?
The CVE-2021-3177 vulnerability affects users of Python versions 3.x through 3.9.1, including those who use applications that accept floating-point numbers as untrusted input. Specifically, the affected versions are Python 3.6.0 to 3.6.12, Python 3.7.0 to 3.7.9, Python 3.8.0 to 3.8.7, Python 3.9.0 to 3.9.1, and Python 3.10. This vulnerability may lead to remote code execution in certain Python applications, posing a security risk for those using the affected versions.
What to do if CVE-2021-3177 affected you
If you're affected by the CVE-2021-3177 vulnerability, it's crucial to take action to protect your systems. Here's a simplified list of steps to follow:
Upgrade your Python version to a patched release (e.g., Python 3.5.3-1+deb9u4 for Debian 9 stretch).
Apply recommended patches or updates, such as the merged pull requests mentioned in the Python tracker.
Stay informed about security updates and advisories, like those provided by Debian LTS.
Is this in CISA’s Known Exploited Vulnerabilities Catalog?
The CVE-2021-3177 vulnerability is not listed in CISA's Known Exploited Vulnerabilities Catalog. This critical security issue affects Python 3.x through 3.9.1 and may lead to remote code execution in certain applications.
Weakness Enumeration
The weakness enumeration for this vulnerability is categorized as CWE-120, which involves a buffer overflow in Python 3.x through 3.9.1 due to unsafe usage of the sprintf function.
Learn More
For a comprehensive understanding of its description, severity, technical details, and affected software configurations, refer to the National Vulnerability Database and the sources listed below.
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