Input validation error in Flask - CVE-2018-1000656

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Main Vulnerability Database Vulnerabilities #VU18150

Input validation error in Flask - CVE-2018-1000656

Published: April 8, 2019


Vulnerability identifier: #VU18150
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2018-1000656
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input when processing JSON data in incorrect encoding. A remote attacker can supply a specially crafted JSON string and consume all available memory resources.

Successful exploitation of the vulnerability may allow an attacker to perform denial of service (DoS) attack.


Affected software

Flask
flask (Ubuntu package)
python-flask (Red Hat package)
F5OS
Red Hat Enterprise Linux for IBM z Systems
Opensuse
BIG-IQ Centralized Management
Oracle Business Intelligence Enterprise Edition
QRadar Assistant

How to mitigate CVE-2018-1000656

Update to version 0.12.3.

Flask - update to 0.12.3
flask (Ubuntu package) - addressed in versions 0.10.1-2ubuntu0.1, 0.10.1-2ubuntu0.1~esm1, 0.12.2-3ubuntu0.1
python-flask (Red Hat package) - update to 0.10.1-5.el7_7
QRadar Assistant - update to 3.7.0

External References

Related Security Bulletins