#VU74198 Input validation error in GNU Libmicrohttpd - CVE-2023-27371

Vulnerability identifier: #VU74198

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-2023-27371

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
GNU Libmicrohttpd
Other software / Other software solutions

Vendor: GNU

Description

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

The vulnerability exists due to insufficient validation of multipart/form-data data within the MHD_create_post_processor() method in the postprocessor.c. A remote attacker can send a specially crafted HTTP POST request to the server and perform a denial of service (DoS) attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions

GNU Libmicrohttpd: 0.9.16 - 0.9.75

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External links
https://github.com/0xhebi/CVEs/tree/main/GNU%20Libmicrohttpd
https://git.gnunet.org/libmicrohttpd.git/commit/?id=6d6846e20bfdf4b3eb1b592c97520a532f724238
https://lists.gnu.org/archive/html/libmicrohttpd/2023-02/msg00000.html

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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.