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

🗓️ 09 Mar 2021 09:23:21Reported by RedHatType 
redhat
 redhat🔗 access.redhat.com👁 2 Views

Python tarfile can loop infinitely on crafted TAR due to missing header validation in _proc_pax.

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Red Hat Enterprise Linux7.4ppc64lepython0:2.7.5-64.el7_4python-0:2.7.5-64.el7_4.ppc64le.rpm
Red Hat Enterprise Linux7.4x86_64python0:2.7.5-64.el7_4python-0:2.7.5-64.el7_4.x86_64.rpm
Red Hat Enterprise Linux7.4ppc64lepython-debug0:2.7.5-64.el7_4python-debug-0:2.7.5-64.el7_4.ppc64le.rpm
Red Hat Enterprise Linux7.4x86_64python-debug0:2.7.5-64.el7_4python-debug-0:2.7.5-64.el7_4.x86_64.rpm
Red Hat Enterprise Linux7.4ppc64lepython-debuginfo0:2.7.5-64.el7_4python-debuginfo-0:2.7.5-64.el7_4.ppc64le.rpm
Red Hat Enterprise Linux7.4x86_64python-debuginfo0:2.7.5-64.el7_4python-debuginfo-0:2.7.5-64.el7_4.x86_64.rpm
Red Hat Enterprise Linux7.4anypython-debuginfo0:2.7.5-64.el7_4.i686python-debuginfo-0:2.7.5-64.el7_4.i686.noarch.rpm
Red Hat Enterprise Linux7.4ppc64lepython-devel0:2.7.5-64.el7_4python-devel-0:2.7.5-64.el7_4.ppc64le.rpm
Red Hat Enterprise Linux7.4x86_64python-devel0:2.7.5-64.el7_4python-devel-0:2.7.5-64.el7_4.x86_64.rpm
Red Hat Enterprise Linux7.4ppc64lepython-libs0:2.7.5-64.el7_4python-libs-0:2.7.5-64.el7_4.ppc64le.rpm
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28 Jun 2026 12:19Current
6.8Medium risk
Vulners AI Score6.8
CVSS 25
CVSS 3.17.5
EPSS0.06304
CWE-835
Python tarfileinfinite loopcrafted tarheader validationpax headerproc pax header
2