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cpython

An issue was found in the CPython `tempfile.TemporaryDirectory` class affecting versions 3.12.1, 3.11.7, 3.10.13, 3.9.18, and 3.8.18 and prior.

The tempfile.TemporaryDirectory class would dereference symlinks during cleanup of permissions-related errors. This means users which can run privileged programs are potentially able to modify permissions of files referenced by symlinks in some circumstances.

CVE-2023-6597 is a vulnerability discovered in the CPython implementation of the tempfile.TemporaryDirectory class, impacting versions 3.8.18, 3.9.18, 3.10.13, 3.11.7, and 3.12.1. The flaw occurs during the cleanup phase of TemporaryDirectory when permissions-related errors arise. Specifically, the class dereferences symbolic links (symlinks) instead of handling them safely, which can lead to unintended modification of file permissions on the target files that symlinks point to. This behavior can be exploited by users who have the capability to run privileged programs locally, enabling them to manipulate permissions of arbitrary files referenced by symlinks. Such manipulation could facilitate privilege escalation or unauthorized access to sensitive files, compromising confidentiality and integrity. The vulnerability does not require user interaction but does require local access and the ability to execute privileged code. The CVSS 3.1 base score is 7.8, reflecting high severity with a vector indicating local attack vector, high attack complexity, no privileges required, no user interaction, and scope change with high confidentiality and integrity impact but no availability impact. No public exploits have been reported yet, but the vulnerability poses a significant risk in multi-user or shared environments where symlinks and privileged programs coexist. The Python Software Foundation has published the vulnerability details, but patch links were not provided at the time of this report.

Detailed information about CVE-2023-6597: Vulnerability in Python Software Foundation CPython affecting Python Software Foundation CPython. Get real-time update

CVE-2023-6597: Vulnerability in Python Software Foundation CPython - Live Threat Intelligence - Threat Radar | OffSeq.com

CVE-2023-6597: Vulnerability in Python Software Foundation CPython

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