CVE-2018-14647

HIGH
7.5
CVSS Score
Published: September 25, 2018 at 12:00 AM UTC
Updated: October 7, 2026 at 07:17 PM UTC
8 products affected across 6 vendorsDebian LinuxFedoraUbuntu Linux

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Severity
HIGH7.5
Exploit prediction
EPSS 11%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

2.7.0 ≤ v ≤ 2.7.153.4.0 ≤ v ≤ 3.4.93.5.0 ≤ v ≤ 3.5.63.6.0 ≤ v ≤ 3.6.6*2.73.43.53.63.73.7.03.83.8, 3.7, 3.6, 3.5, 3.4, 2.7

References (16)

Vendor Advisoryx_refsource_SUSEMailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00040.html
VDB Entryx_refsource_BIDThird Party Advisory
http://www.securityfocus.com/bid/105396
VDB Entryx_refsource_SECTRACKThird Party Advisory
http://www.securitytracker.com/id/1041740
Vendor Advisoryx_refsource_REDHATThird Party Advisory
https://access.redhat.com/errata/RHSA-2019:1260
Vendor Advisoryx_refsource_REDHATThird Party Advisory
https://access.redhat.com/errata/RHSA-2019:2030
Vendor Advisoryx_refsource_REDHATThird Party Advisory
https://access.redhat.com/errata/RHSA-2019:3725
x_refsource_MISCIssue TrackingPatchVendor Advisory
https://bugs.python.org/issue34623
x_refsource_CONFIRMIssue TrackingThird Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14647

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-335CWE-665CWE-909

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