CVE-2018-1000656
mediumpriority · track · 31EPSS 0.039 · 90 %ileEUUSEPSS · scored 2026-10-27
The Pallets Project flask version Before 0.12.3 contains a CWE-20: Improper Input Validation vulnerability in flask that can result in 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. This vulnerability appears to have been fixed in 0.12.3. NOTE: this may overlap CVE-2019-1010083.
remediations
Vendor fix, mitigation, or workaround guidance, as published by each source.
A vendor fix is available.
- Fixedpython-flask-1:0.10.1-5.el7_7.noarch as a component of Red Hat Enterprise Linux 7 Extrasredhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2020:0870 - Fixedpython-flask-1:0.10.1-5.el7_7.src as a component of Red Hat Enterprise Linux 7 Extrasredhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2020:0870
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5–7.5
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (8)
Products and version ranges known to be affected.
- netapp hyper converged infrastructureall versionsnvdUScpe:2.3:a:netapp:hyper_converged_infrastructure:*:*:*:*:*:*:*:*
- netapp ontap select deploy utilityall versionsnvdUScpe:2.3:a:netapp:ontap_select_deploy_utility:*:*:*:*:*:*:*:*
advisories (3)
Vendor and ecosystem advisories describing this.
- RHSA-2020:0870Red Hat Security Advisory: python-flask security update2020-03-17csaf · redhat_csafUS
An update for python-flask is now available for Red Hat Enterprise Linux 7 Extras. Red Hat Product Security has rated this update as having a security impact of Low. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
- GHSA-562c-5r94-xh97Flask is vulnerable to Denial of Service via incorrect encoding of JSON data2018-08-23ghsa · osvUS
The Pallets Project flask version Before 0.12.3 contains a CWE-20: Improper Input Validation vulnerability in flask that can result in 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. This vulnerability appears to have been fixed in 0.12.3.
- PYSEC-2018-662018-08-20vendor · osvUS
The Pallets Project flask version Before 0.12.3 contains a CWE-20: Improper Input Validation vulnerability in flask that can result in 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. This vulnerability appears to have been fixed in 0.12.3. NOTE: this may overlap CVE-2019-1010083.
also known as (6)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (25)
External citations — patches, advisories, analysis.
- https://github.com/pallets/flask/pull/2691cnnvd
- https://github.com/pallets/flask/releases/tag/0.12.3cnnvd
- https://lists.debian.org/debian-lts-announce/2019/08/msg00025.htmlcnnvd
- https://packetstormsecurity.com/files/156799/Red-Hat-Security-Advisory-2020-0870-01.htmlcnnvd
- https://packetstormsecurity.com/files/157897/Ubuntu-Security-Notice-USN-4378-1.htmlcnnvd
- https://security.netapp.com/advisory/ntap-20190221-0001/cnnvd
- https://usn.ubuntu.com/4378-1/cnnvd
- https://vigilance.fr/vulnerability/Python-Pallets-Project-Flask-memory-leak-via-JSON-Data-28928cnnvd
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