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python: infinite loop in the tarfile module via crafted TAR archive

🗓️ 04 Nov 2020 01:25:20Reported by RedHatType 
redhat
 redhat🔗 access.redhat.com👁 2 Views

Python tarfile module loops infinitely on crafted tar archives due to _proc_pax header validation flaw.

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OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux8aarch64cython-debugsource0:0.28.1-7.module+el8.1.0+3111+de3f2d8eCython-debugsource-0:0.28.1-7.module+el8.1.0+3111+de3f2d8e.aarch64.rpm
Red Hat Enterprise Linux8ppc64lecython-debugsource0:0.28.1-7.module+el8.1.0+3111+de3f2d8eCython-debugsource-0:0.28.1-7.module+el8.1.0+3111+de3f2d8e.ppc64le.rpm
Red Hat Enterprise Linux8s390xcython-debugsource0:0.28.1-7.module+el8.1.0+3111+de3f2d8eCython-debugsource-0:0.28.1-7.module+el8.1.0+3111+de3f2d8e.s390x.rpm
Red Hat Enterprise Linux8x86_64cython-debugsource0:0.28.1-7.module+el8.1.0+3111+de3f2d8eCython-debugsource-0:0.28.1-7.module+el8.1.0+3111+de3f2d8e.x86_64.rpm
Red Hat Enterprise Linux8aarch64pyyaml-debugsource0:3.12-16.module+el8.1.0+3111+de3f2d8ePyYAML-debugsource-0:3.12-16.module+el8.1.0+3111+de3f2d8e.aarch64.rpm
Red Hat Enterprise Linux8ppc64lepyyaml-debugsource0:3.12-16.module+el8.1.0+3111+de3f2d8ePyYAML-debugsource-0:3.12-16.module+el8.1.0+3111+de3f2d8e.ppc64le.rpm
Red Hat Enterprise Linux8s390xpyyaml-debugsource0:3.12-16.module+el8.1.0+3111+de3f2d8ePyYAML-debugsource-0:3.12-16.module+el8.1.0+3111+de3f2d8e.s390x.rpm
Red Hat Enterprise Linux8x86_64pyyaml-debugsource0:3.12-16.module+el8.1.0+3111+de3f2d8ePyYAML-debugsource-0:3.12-16.module+el8.1.0+3111+de3f2d8e.x86_64.rpm
Red Hat Enterprise Linux8anybabel0:2.5.1-9.module+el8.1.0+3111+de3f2d8e.noarchbabel-0:2.5.1-9.module+el8.1.0+3111+de3f2d8e.noarch.noarch.rpm
Red Hat Enterprise Linux8aarch64numpy-debugsource1:1.14.2-13.module+el8.1.0+3323+7ac3e00fnumpy-debugsource-1:1.14.2-13.module+el8.1.0+3323+7ac3e00f.aarch64.rpm
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28 Jun 2026 12:33Current
6.8Medium risk
Vulners AI Score6.8
CVSS 25
CVSS 3.17.5
EPSS0.06304
CWE-835
pythontarfilecrafted tar archivesinfinite loopheader validationpax
2