CVE-2023-6597

NameCVE-2023-6597
DescriptionAn 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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
ReferencesDLA-3772-1
Debian Bugs1070135

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
pypy3 (PTS)buster7.0.0+dfsg-3vulnerable
bullseye (security), bullseye7.3.5+dfsg-2+deb11u2vulnerable
bookworm7.3.11+dfsg-2+deb12u1vulnerable
sid, trixie7.3.16+dfsg-2fixed
python2.7 (PTS)jessie, jessie (lts)2.7.9-2-ds1-1+deb8u12fixed
stretch (security)2.7.13-2+deb9u6fixed
stretch (lts), stretch2.7.13-2+deb9u9fixed
buster2.7.16-2+deb10u1fixed
buster (security)2.7.16-2+deb10u4fixed
bullseye2.7.18-8+deb11u1fixed
python3.11 (PTS)bookworm3.11.2-6vulnerable
sid, trixie3.11.9-1fixed
python3.12 (PTS)sid, trixie3.12.3-1fixed
python3.4 (PTS)jessie, jessie (lts)3.4.2-1+deb8u17fixed
python3.5 (PTS)stretch (security)3.5.3-1+deb9u5fixed
stretch (lts), stretch3.5.3-1+deb9u9fixed
python3.7 (PTS)buster3.7.3-2+deb10u3vulnerable
buster (security)3.7.3-2+deb10u7fixed
python3.9 (PTS)bullseye3.9.2-1vulnerable

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
pypy3source(unstable)7.3.13+dfsg-1
python2.7source(unstable)(not affected)
python3.10source(unstable)(unfixed)
python3.11source(unstable)3.11.8-11070135
python3.12source(unstable)3.12.1-1
python3.4source(unstable)(not affected)
python3.5source(unstable)(not affected)
python3.7sourcebuster3.7.3-2+deb10u7DLA-3772-1
python3.7source(unstable)(unfixed)
python3.9source(unstable)(unfixed)

Notes

[bookworm] - python3.11 <no-dsa> (Minor issue)
[bullseye] - python3.9 <no-dsa> (Minor issue)
- python2.7 <not-affected> (tempfile.TemporaryDirectory added in 3.2)
[bookworm] - pypy3 <no-dsa> (Minor issue)
[bullseye] - pypy3 <no-dsa> (Minor issue)
[buster] - pypy3 <no-dsa> (Minor issue)
https://github.com/python/cpython/pull/99930
https://github.com/python/cpython/issues/91133
https://github.com/python/cpython/commit/6ceb8aeda504b079fef7a57b8d81472f15cdd9a5 (v3.12.1)
https://github.com/python/cpython/commit/5585334d772b253a01a6730e8202ffb1607c3d25 (v3.11.8)
https://github.com/python/cpython/commit/8eaeefe49d179ca4908d052745e3bb8b6f238f82 (v3.10.14)
https://github.com/python/cpython/commit/d54e22a669ae6e987199bb5d2c69bb5a46b0083b (v3.9.19)
https://mail.python.org/archives/list/security-announce@python.org/thread/Q5C6ATFC67K53XFV4KE45325S7NS62LD/
Introduced by: https://github.com/python/cpython/commit/e9b51c0ad81da1da11ae65840ac8b50a8521373c (v3.8.0b1)
- python3.4 <not-affected> (Vulnerable code introduced later)
- python3.5 <not-affected> (Vulnerable code introduced later)

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