CVE-2023-27371

Public Exploit

Description

GNU libmicrohttpd before 0.9.76 allows remote DoS (Denial of Service) due to improper parsing of a multipart/form-data boundary in the postprocessor.c MHD_create_post_processor() method. This allows an attacker to remotely send a malicious HTTP POST packet that includes one or more '\0' bytes in a multipart/form-data boundary field, which - assuming a specific heap layout - will result in an out-of-bounds read and a crash in the find_boundary() function.

References

Link	Tags
https://git.gnunet.org/libmicrohttpd.git/commit/?id=6d6846e20bfdf4b3eb1b592c97520a532f724238	patch
https://github.com/0xhebi/CVEs/tree/main/GNU%20Libmicrohttpd	exploit third party advisory
https://lists.gnu.org/archive/html/libmicrohttpd/2023-02/msg00000.html	mailing list
https://lists.debian.org/debian-lts-announce/2023/03/msg00029.html	mailing list

Frequently Asked Questions

What is the severity of CVE-2023-27371?: CVE-2023-27371 has been scored as a medium severity vulnerability.
How to fix CVE-2023-27371?: To fix CVE-2023-27371, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2023-27371 being actively exploited in the wild?: It is possible that CVE-2023-27371 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.

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Description

Category

CWE-125 – Out-of-bounds Read

References

Frequently Asked Questions