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CVE-2019-20907

Date: July 13, 2020

In 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.

Language: C

Severity Score

Related Resources (33)

https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PDKKRXLNVXRF6VGERZSR3OMQR5D5QI6I/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TOGKLGTXZLHQQFBVCAPSUDA6DOOJFNRY/
https://nvd.nist.gov/vuln/detail/CVE-2019-20907
https://access.redhat.com/security/cve/CVE-2019-20907
https://github.com/python/cpython/pull/21454
https://security.netapp.com/advisory/ntap-20200731-0002/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/CNHPQGSP2YM3JAUD2VAMPXTIUQTZ2M2U/
https://lists.debian.org/debian-lts-announce/2020/11/msg00032.html
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/CTUNTBJ3POHONQOTLEZC46POCIYYTAKZ/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/LE4O3PNDNNOMSKHNUKZKD3NGHIFUFDPX/
https://security-tracker.debian.org/tracker/CVE-2019-20907
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/NTBKKOLFFNHG6CM4ACDX4APHSD5ZX5N4/
https://www.oracle.com/security-alerts/cpujan2021.html
https://people.canonical.com/~ubuntu-security/cve/CVE-2019-20907
https://lists.debian.org/debian-lts-announce/2023/05/msg00024.html
https://usn.ubuntu.com/4428-1/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VT4AF72TJ2XNIKCR4WEBR7URBJJ4YZRD/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/YSL3XWVDMSMKO23HR74AJQ6VEM3C2NTS/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/YILCHHTNLH4GG4GSQBX2MZRKZBXOLCKE/
https://security.gentoo.org/glsa/202008-01
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00056.html
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00053.html
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/36XI3EEQNMHGOZEI63Y7UV6XZRELYEAU/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/V3TALOUBYU2MQD4BPLRTDQUMBKGCAXUA/
https://bugs.python.org/issue39017
https://security.alpinelinux.org/vuln/CVE-2019-20907
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00051.html
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OXI72HIHMXCQFWTULUXDG7VDA2BCYL4Y/
https://lists.debian.org/debian-lts-announce/2020/08/msg00034.html
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00052.html
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/V53P2YOLEQH4J7S5QHXMKMZYFTVVMTMO/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/CAXHCY4V3LPAAJOBCJ26ISZ4NUXQXTUZ/
https://www.mend.io/vulnerability-database/CVE-2019-20907

Severity Score

Weakness Type (CWE)

Input Validation

CWE-20

Loop with Unreachable Exit Condition ('Infinite Loop')

CWE-835

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): PARTIAL
Additional information:

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