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CVE-2023-27371

libmicrohttpd: remote DoS

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.

CVSS 3.1 · 5.9 Medium EPSS 1.3% KEV · Not listed
Vendors
Gnu Redhat
Products
Libmicrohttpd Enterprise Linux Rhel Eus
CVE-2025-59777

libmicrohttpd: GNU libmicrohttpd null pointer dereference

NULL pointer dereference vulnerability exists in GNU libmicrohttpd v1.0.2 and earlier. The vulnerability was fixed in commit ff13abc on the master branch of the libmicrohttpd Git repository, after the v1.0.2 tag. A specially crafted packet sent by an attacker could cause a denial-of-service (DoS) condition.

CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
Vendors
Gnu
Products
Libmicrohttpd
CVE-2025-62689

libmicrohttpd: GNU libmicrohttpd null pointer dereference

NULL pointer dereference vulnerability exists in GNU libmicrohttpd v1.0.2 and earlier. The vulnerability was fixed in commit ff13abc on the master branch of the libmicrohttpd Git repository, after the v1.0.2 tag. A specially crafted packet sent by an attacker could cause a denial-of-service (DoS) condition.

CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
Vendors
Gnu
Products
Libmicrohttpd
CVE-2013-7038

libmicrohttpd: out-of-bounds read in MHD_http_unescape()

The MHD_http_unescape function in libmicrohttpd before 0.9.32 might allow remote attackers to obtain sensitive information or cause a denial of service (crash) via unspecified vectors that trigger an out-of-bounds read.

CVSS 2.0 · 6.4 Medium EPSS 1.8% KEV · Not listed
Vendors
Gnu
Products
Libmicrohttpd
CVE-2013-7039

libmicrohttpd: stack overflow in MHD_digest_auth_check()

Stack-based buffer overflow in the MHD_digest_auth_check function in libmicrohttpd before 0.9.32, when MHD_OPTION_CONNECTION_MEMORY_LIMIT is set to a large value, allows remote attackers to cause a denial of service (crash) or possibly execute arbitrary code via a long URI in an authentication header.

CVSS 2.0 · 5.1 Medium EPSS 3.3% KEV · Not listed
Vendors
Gnu
Products
Libmicrohttpd
CVE-2021-3466

libmicrohttpd: Buffer overflow issue in URL parser in the post_process_urlencoded function

A flaw was found in libmicrohttpd. A missing bounds check in the post_process_urlencoded function leads to a buffer overflow, allowing a remote attacker to write arbitrary data in an application that uses libmicrohttpd. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability. Only version 0.9.70 is vulnerable.

CVSS 3.1 · 9.8 Critical EPSS 8.7% KEV · Not listed
Vendors
Fedoraproject Gnu Redhat
Products
Fedora Libmicrohttpd Enterprise Linux