#VU82548 Inefficient Algorithmic Complexity in Werkzeug - CVE-2023-46136

Vulnerability identifier: #VU82548

Vulnerability risk: Medium

CVSSv4.0: 6.6 [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/E:U/U:Green]

CVE-ID: CVE-2023-46136

CWE-ID: CWE-407

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Werkzeug
Web applications / JS libraries

Vendor: The Pallets Projects

Description

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

The vulnerability exists due to high resource usage when parsing multipart/form-data. A remote attacker can pass specially crafted input to the application and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Werkzeug: 0.1 - 3.0.0

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External links
https://github.com/pallets/werkzeug/commit/f3c803b3ade485a45f12b6d6617595350c0f03e2
https://github.com/pallets/werkzeug/security/advisories/GHSA-hrfv-mqp8-q5rw

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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.