CVE-2023-6597 Affecting python3.5 package, versions <3.5.2-2ubuntu0~16.04.13+esm13

Note: Versions mentioned in the description apply only to the upstream python3.5 package and not the python3.5 package as distributed by Ubuntu. See How to fix? for Ubuntu:16.04 relevant fixed versions and status.

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.

• http://people.ubuntu.com/~ubuntu-security/cve/CVE-2023-6597
• http://www.openwall.com/lists/oss-security/2024/03/20/5
• https://github.com/python/cpython/commit/02a9259c717738dfe6b463c44d7e17f2b6d2cb3a
• https://github.com/python/cpython/commit/5585334d772b253a01a6730e8202ffb1607c3d25
• https://github.com/python/cpython/commit/6ceb8aeda504b079fef7a57b8d81472f15cdd9a5
• https://github.com/python/cpython/commit/81c16cd94ec38d61aa478b9a452436dc3b1b524d
• https://github.com/python/cpython/commit/8eaeefe49d179ca4908d052745e3bb8b6f238f82
• https://github.com/python/cpython/commit/d54e22a669ae6e987199bb5d2c69bb5a46b0083b
• https://github.com/python/cpython/issues/91133
• https://lists.debian.org/debian-lts-announce/2024/03/msg00025.html
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/T3IGRX54M7RNCQOXVQO5KQKTGWCOABIM/
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/U5VHWS52HGD743C47UMCSAK2A773M2YE/
• https://mail.python.org/archives/list/security-announce@python.org/thread/Q5C6ATFC67K53XFV4KE45325S7NS62LD/