CVE-2019-20907

NameCVE-2019-20907
DescriptionIn Lib/tarfile.py in Python through 3.8.3, an attacker is able to craft a TAR archive leading to an infinite loop when opened by tarfile.open, because _proc_pax lacks header validation.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
ReferencesDLA-2337-1, DLA-2456-1, DLA-3432-1, ELA-265-1, ELA-289-1
Debian Bugs970099

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+deb11u2fixed
bookworm7.3.11+dfsg-2+deb12u1fixed
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+deb10u1vulnerable
buster (security)2.7.16-2+deb10u4fixed
bullseye2.7.18-8+deb11u1fixed
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+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
pypy3source(unstable)7.3.3+dfsg-1
python2.7sourcejessie2.7.9-2-ds1+deb8u6ELA-265-1
python2.7sourcestretch2.7.13-2+deb9u4DLA-2337-1
python2.7sourcebuster2.7.16-2+deb10u2DLA-3432-1
python2.7source(unstable)2.7.18-2low970099
python3.4sourcejessie3.4.2-1+deb8u9ELA-289-1
python3.5sourcestretch3.5.3-1+deb9u3DLA-2456-1
python3.5source(unstable)(unfixed)low
python3.7sourcebuster3.7.3-2+deb10u2
python3.7source(unstable)(unfixed)low
python3.8source(unstable)3.8.5-1low
python3.9source(unstable)3.9.0~b5-1low

Notes

https://bugs.python.org/issue39017
https://github.com/python/cpython/commit/5a8d121a1f3ef5ad7c105ee378cc79a3eac0c7d4 (master)
https://github.com/python/cpython/commit/f3232294ee695492f43d424cc6969d018d49861d (3.9-branch)
https://github.com/python/cpython/commit/c55479556db015f48fc8bbca17f64d3e65598559 (3.8-branch)
https://github.com/python/cpython/commit/79c6b602efc9a906c8496f3d5f4d54c54b48fa06 (3.7-branch)
https://github.com/python/cpython/commit/47a2955589bdb1a114d271496ff803ad73f954b8 (3.6-branch)
https://github.com/python/cpython/pull/21454

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