CVE-2018-14647

Description

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.

Categories

7.5
CVSS
Severity: High
CVSS 3.1 •
CVSS 3.0 •
CVSS 2.0 •
EPSS 1.30% Top 25%
Vendor Advisory debian.org Vendor Advisory ubuntu.com Vendor Advisory debian.org Vendor Advisory ubuntu.com Vendor Advisory fedoraproject.org Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory opensuse.org Vendor Advisory python.org
Affected: The Python Project Python
Published at:
Updated at:

References

Link Tags
https://www.debian.org/security/2018/dsa-4306 third party advisory vendor advisory
https://usn.ubuntu.com/3817-2/ third party advisory vendor advisory
http://www.securitytracker.com/id/1041740 third party advisory vdb entry
http://www.securityfocus.com/bid/105396 third party advisory vdb entry
https://www.debian.org/security/2018/dsa-4307 third party advisory vendor advisory
https://bugs.python.org/issue34623 patch vendor advisory issue tracking
https://usn.ubuntu.com/3817-1/ third party advisory vendor advisory
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14647 third party advisory issue tracking
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RBJCB2HWOJLP3L7CUQHJHNBHLSVOXJE5/ vendor advisory
https://access.redhat.com/errata/RHSA-2019:1260 third party advisory vendor advisory
https://lists.debian.org/debian-lts-announce/2019/06/msg00022.html third party advisory mailing list
https://lists.debian.org/debian-lts-announce/2019/06/msg00023.html third party advisory mailing list
https://access.redhat.com/errata/RHSA-2019:2030 third party advisory vendor advisory
https://access.redhat.com/errata/RHSA-2019:3725 third party advisory vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00040.html vendor advisory mailing list third party advisory
https://lists.apache.org/thread.html/r1b103833cb5bc8466e24ff0ecc5e75b45a705334ab6a444e64e840a0%40%3Cissues.bookkeeper.apache.org%3E mailing list

Frequently Asked Questions

What is the severity of CVE-2018-14647?
CVE-2018-14647 has been scored as a high severity vulnerability.
How to fix CVE-2018-14647?
To fix CVE-2018-14647, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2018-14647 being actively exploited in the wild?
It is possible that CVE-2018-14647 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2018-14647?
CVE-2018-14647 affects The Python Project Python.
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