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Vulnerability · Published Feb 28, 2023 · Assigned by mitre

CVE-2023-27371

Medium 5.9

In plain English

A medium-severity security flaw in the libmicrohttpd package (AlmaLinux). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.3% (higher than 70% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)5.9Medium
Exploit odds (30 days)1.3%top 30.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:8libmicrohttpd1:0.9.59-3.el8ALSA-2023:7090
AlmaLinux:9libmicrohttpd1:0.9.72-5.el9ALSA-2023:6566
AlmaLinux:8libmicrohttpd-devel1:0.9.59-3.el8ALSA-2023:7090
AlmaLinux:9libmicrohttpd-devel1:0.9.72-5.el9ALSA-2023:6566
AlmaLinux:8libmicrohttpd-doc1:0.9.59-3.el8ALSA-2023:7090
AlmaLinux:9libmicrohttpd-doc1:0.9.72-5.el9ALSA-2023:6566
Debian:12libmicrohttpd0.9.75-6DEBIAN-CVE-2023-27371
Debian:13libmicrohttpd0.9.75-6DEBIAN-CVE-2023-27371
Debian:14libmicrohttpd0.9.75-6DEBIAN-CVE-2023-27371
Rocky Linux:8libmicrohttpd1:0.9.59-3.el8RLSA-2023:7090
Rocky Linux:9libmicrohttpd1:0.9.72-5.el9RLSA-2023:6566
Ubuntu:22.04:LTSlibmicrohttpdno fix listedUBUNTU-CVE-2023-27371
Ubuntu:24.04:LTSlibmicrohttpdno fix listedUBUNTU-CVE-2023-27371

Affected products (as reported)

VendorProductVersions
n/a n/a n/a

References