Vulnerability identifier: #VU19269

Vulnerability risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-1010083

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Flask
Web applications / CMS

Vendor: The Pallets Projects

Description

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

The vulnerability exists due to the package allows for unsafe encoded JSON data to be decoded. A remote attacker can perform a denial of service attack on the affected system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Flask: 0.1 - 0.12.4

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External links
http://www.palletsprojects.com/blog/flask-1-0-released/
http://github.com/pallets/flask/pull/2691

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.