Bug 1623131 (CVE-2018-1000656) - CVE-2018-1000656 python-flask: Denial of Service via crafted JSON file
Summary: CVE-2018-1000656 python-flask: Denial of Service via crafted JSON file
Alias: CVE-2018-1000656
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
Depends On: 1623179 1623180 1623770 1623771 1623772 1633596 1636188 1642087 1810065 1810068
Blocks: 1623143
TreeView+ depends on / blocked
Reported: 2018-08-28 14:23 UTC by Laura Pardo
Modified: 2023-10-06 17:53 UTC (History)
35 users (show)

Fixed In Version: python-flask 0.12.3
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Last Closed: 2020-03-17 22:31:43 UTC

Attachments (Terms of Use)

System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2020:0870 0 None None None 2020-03-17 17:11:17 UTC

Description Laura Pardo 2018-08-28 14:23:37 UTC
A flaw was found in The Pallets Project flask version Before 0.12.3. An Improper Input Validation vulnerability in flask that can result in a large amount of memory usage possibly leading to denial of service. This attack appear to be exploitable via Attacker provides JSON data in incorrect encoding.


Comment 1 Laura Pardo 2018-08-28 16:23:00 UTC
Created python-flask tracking bugs for this issue:

Affects: fedora-all [bug 1623179]

Comment 20 Richard Maciel Costa 2019-03-29 13:07:41 UTC

This issue affects the versions of python-flask as shipped with Red Hat Enterprise Linux 7.

Although Red Hat Satellite 6 contains the vulnerable component, the former is not affected due to python-flask only receiving JSON data created by other Red Hat Satellite 6 components, not user-controlled JSON data, which makes the attack unfeasible.

Comment 26 errata-xmlrpc 2020-03-17 17:11:15 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7 Extras

Via RHSA-2020:0870 https://access.redhat.com/errata/RHSA-2020:0870

Comment 27 Product Security DevOps Team 2020-03-17 22:31:43 UTC
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):


Note You need to log in before you can comment on or make changes to this bug.