{"id":"CVE-2018-14647","details":"Python's elementtree C accelerator failed to initialise Expat's hash salt during initialization. This could make it easy to conduct denial of service attacks against Expat by constructing an XML document that would cause pathological hash collisions in Expat's internal data structures, consuming large amounts CPU and RAM. The vulnerability exists in Python versions 3.7.0, 3.6.0 through 3.6.6, 3.5.0 through 3.5.6, 3.4.0 through 3.4.9, 2.7.0 through 2.7.15.","aliases":["PSF-2018-5"],"modified":"2026-05-18T05:51:30.184144750Z","published":"2018-09-25T00:29:00.703Z","related":["SUSE-SU-2018:3156-1","SUSE-SU-2019:0482-1","SUSE-SU-2019:0482-2","SUSE-SU-2019:2053-1","SUSE-SU-2019:2053-2","SUSE-SU-2020:0114-1","SUSE-SU-2020:0234-1","SUSE-SU-2020:2699-1","openSUSE-SU-2020:0086-1","openSUSE-SU-2024:11202-1","openSUSE-SU-2024:11284-1"],"database_specific":{"unresolved_ranges":[{"source":"CPE_FIELD","vendor_product":"canonical:ubuntu_linux","extracted_events":[{"last_affected":"12.04"},{"last_affected":"14.04"},{"last_affected":"16.04"},{"last_affected":"18.04"}],"cpes":["cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:*","cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*","cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*","cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*"]},{"source":"CPE_FIELD","vendor_product":"debian:debian_linux","extracted_events":[{"last_affected":"8.0"},{"last_affected":"9.0"}],"cpes":["cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*","cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*"]},{"source":"CPE_FIELD","vendor_product":"fedoraproject:fedora","extracted_events":[{"last_affected":"30"}],"cpes":["cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:*"]},{"source":"CPE_FIELD","vendor_product":"opensuse:leap","extracted_events":[{"last_affected":"15.1"}],"cpes":["cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*"]},{"source":"CPE_FIELD","vendor_product":"redhat:enterprise_linux_desktop","extracted_events":[{"last_affected":"7.0"}],"cpes":["cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*"]},{"source":"CPE_FIELD","vendor_product":"redhat:enterprise_linux_server","extracted_events":[{"last_affected":"7.0"}],"cpes":["cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*"]},{"source":"CPE_FIELD","vendor_product":"redhat:enterprise_linux_workstation","extracted_events":[{"last_affected":"7.0"}],"cpes":["cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:*"]}]},"references":[{"type":"WEB","url":"https://lists.apache.org/thread.html/r1b103833cb5bc8466e24ff0ecc5e75b45a705334ab6a444e64e840a0%40%3Cissues.bookkeeper.apache.org%3E"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RBJCB2HWOJLP3L7CUQHJHNBHLSVOXJE5/"},{"type":"ADVISORY","url":"http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00040.html"},{"type":"ADVISORY","url":"http://www.securityfocus.com/bid/105396"},{"type":"ADVISORY","url":"http://www.securitytracker.com/id/1041740"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2019:1260"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2019:2030"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2019:3725"},{"type":"ADVISORY","url":"https://lists.debian.org/debian-lts-announce/2019/06/msg00022.html"},{"type":"ADVISORY","url":"https://lists.debian.org/debian-lts-announce/2019/06/msg00023.html"},{"type":"ADVISORY","url":"https://usn.ubuntu.com/3817-1/"},{"type":"ADVISORY","url":"https://usn.ubuntu.com/3817-2/"},{"type":"ADVISORY","url":"https://www.debian.org/security/2018/dsa-4306"},{"type":"ADVISORY","url":"https://www.debian.org/security/2018/dsa-4307"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14647"},{"type":"FIX","url":"https://bugs.python.org/issue34623"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/python/cpython","events":[{"introduced":"0"},{"last_affected":"ca079a3ea30098aff3197c559a0e32d42dda6d84"},{"last_affected":"1bf9cc509326bc42cd8cb1650eb9bf64550d817e"},{"introduced":"3101b7076270756f8be699358c69c5d15ea2cc48"},{"last_affected":"0a5a5af9b6b47727c5ee3def4508dab312949075"},{"introduced":"2e789a1f1d84b343a996e8654590703b5fbdd441"},{"last_affected":"627d0c61ac96009450e3794a2401f244e56fcb79"},{"introduced":"5c4568a05a0a62b5947c55f68f9f2ecfb90a4f12"},{"last_affected":"4cf1f54eb764f856fda5a394d8598c0c90d69d77"}],"database_specific":{"source":"CPE_FIELD","extracted_events":[{"introduced":"2.7.0"},{"last_affected":"2.7.15"},{"introduced":"0"},{"last_affected":"3.7.0"},{"introduced":"3.4.0"},{"last_affected":"3.4.9"},{"introduced":"3.5.0"},{"last_affected":"3.5.6"},{"introduced":"3.6.0"},{"last_affected":"3.6.6"}],"cpe":["cpe:2.3:a:python:python:*:*:*:*:*:*:*:*","cpe:2.3:a:python:python:3.7.0:*:*:*:*:*:*:*"]}}],"versions":["v3.5.6","v3.4.9","v3.5.6rc1","v3.4.9rc1","v3.7.0","v3.6.6","v3.7.0rc1","v3.6.6rc1","v3.7.0b5","v3.7.0b4","v2.7.15","v2.7.15rc1","v3.7.0b3","v3.7.0b2","v3.5.5","v3.4.8","v3.5.5rc1","v3.4.8rc1","v3.7.0b1","v3.7.0a2","v3.4.7","v3.5.4","v3.5.4rc1","v3.4.7rc1","v3.6.2rc1","v3.4.6","v3.5.3","v3.5.3rc1","v3.4.6rc1","v3.6.0rc1","v2.7.13rc1","v3.6.0b4","v3.6.0b3","v3.6.0b1","v3.6.0a3","v3.4.5","v3.5.2","v3.4.5rc1","v3.5.2rc1","v2.7.12rc1","v3.5.1rc1","v2.7.11rc1","v3.5.0rc3","v3.5.0rc2","v3.5.0rc1","v3.5.0b4","v3.5.0b3","v3.5.0b1","v2.7.10rc1","v3.5.0a4","v3.5.0a3","v3.5.0a2","v3.4.3","v3.5.0a1","v3.4.3rc1","v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