DescriptionOn Windows a directory returned by tempfile.mkdtemp() would not always have permissions set to restrict reading and writing to the temporary directory by other users, instead usually inheriting the correct permissions from the default location. Alternate configurations or users without a profile directory may not have the intended permissions. If you’re not using Windows or haven’t changed the temporary directory location then you aren’t affected by this vulnerability. On other platforms the returned directory is consistently readable and writable only by the current user. This issue was caused by Python not supporting Unix permissions on Windows. The fix adds support for Unix “700” for the mkdir function on Windows which is used by mkdtemp() to ensure the newly created directory has the proper permissions.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
python2.7 (PTS)buster2.7.16-2+deb10u1fixed
buster (security)2.7.16-2+deb10u4fixed
python3.11 (PTS)bookworm3.11.2-6fixed
sid, trixie3.11.9-1fixed
python3.12 (PTS)sid, trixie3.12.3-1fixed
python3.7 (PTS)buster3.7.3-2+deb10u3fixed
buster (security)3.7.3-2+deb10u7fixed
python3.9 (PTS)bullseye3.9.2-1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
python2.7source(unstable)(not affected)
python3.11source(unstable)(not affected)
python3.12source(unstable)(not affected)
python3.7source(unstable)(not affected)
python3.9source(unstable)(not affected)


- python3.12 <not-affected> (Specific to Windows)
- python3.11 <not-affected> (Specific to Windows)
- python3.9 <not-affected> (Specific to Windows)
- python3.7 <not-affected> (Specific to Windows)
- python2.7 <not-affected> (Specific to Windows)

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