CVE-2018-14647
HIGH severity · CVSS 7.5 · CWE-335
7.5CVSS HIGH
Summary
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.
Impact & exploitability
Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
Confidentiality impactNone
Integrity impactNone
Availability impactHigh
Exploit probability (EPSS)11%
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products we track (1)
Recommendation
Apply the vendor fix promptly. Open any affected product above for its exact safe version.
Official patch: https://bugs.python.org/issue34623 ↗
Additional information
- NVD record
- https://bugs.python.org/issue34623Patch
- http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00040.htmlAdvisory
- http://www.securityfocus.com/bid/105396Advisory
- http://www.securitytracker.com/id/1041740Advisory
- https://access.redhat.com/errata/RHSA-2019:1260Advisory
- https://access.redhat.com/errata/RHSA-2019:2030Advisory
- https://access.redhat.com/errata/RHSA-2019:3725Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14647Advisory