Is CVE-2023-27371 in the CISA KEV catalog?

No. CVE-2023-27371 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2023-27371?

CVE-2023-27371 has a CVSS v3 base score of 5.9 (MEDIUM).

What is the EPSS score for CVE-2023-27371?

CVE-2023-27371 has an EPSS score of 1.24% (66th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2023-27371?

Upgrade libmicrohttpd on debian 11 to 0.9.72-2+deb11u1 or later. Fixes are available for 11 affected products.

CVE & CISA-KEV Catalog

CVE-2023-27371

MEDIUM

5.9

CVSS v3

NVD

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.

CWE-125Out-of-bounds Read

How to fix

Remediation Available

libmicrohttpdDebian

Fixed in:0.9.72-2+deb11u1CVE-2023-27371

Fixed in:0.9.75-6CVE-2023-27371

libmicrohttpdRocky

Fixed in:1:0.9.59-3.el8RHSA-2023:7090

Fixed in:1:0.9.59-2.el8_8.1RHSA-2024:0584

Fixed in:1:0.9.59-2.el8_6.1RHSA-2024:1109

Fixed in:1:0.9.59-3.el8RHSA-2023:7090

Fixed in:1:0.9.72-5.el9RHSA-2023:6566

libmicrohttpdRed Hat / RHEL

Fixed in:1:0.9.59-2.el8_8.1RHSA-2024:0584

Fixed in:1:0.9.59-2.el8_6.1RHSA-2024:1109

Fixed in:1:0.9.59-3.el8RHSA-2023:7090

Fixed in:1:0.9.72-5.el9RHSA-2023:6566

libmicrohttpd-debuginfoRed Hat / RHEL

Fixed in:1:0.9.59-2.el8_8.1RHSA-2024:0584

Fixed in:1:0.9.59-3.el8RHSA-2023:7090

Fixed in:1:0.9.59-2.el8_8.1RHSA-2024:0584

Fixed in:1:0.9.59-3.el8RHSA-2023:7090

Fixed in:1:0.9.59-2.el8_8.1RHSA-2024:0584

Fixed in:1:0.9.59-3.el8RHSA-2023:7090

Fixed in:1:0.9.59-2.el8_6.1RHSA-2024:1109

Fixed in:1:0.9.59-3.el8RHSA-2023:7090

Fixed in:1:0.9.59-2.el8_6.1RHSA-2024:1109

Fixed in:1:0.9.59-3.el8RHSA-2023:7090

Fixed in:1:0.9.59-2.el8_6.1RHSA-2024:1109

Fixed in:1:0.9.72-5.el9RHSA-2023:6566

libmicrohttpd-debuginfoRocky

Fixed in:1:0.9.59-2.el8_6.1RHSA-2024:1109

Fixed in:1:0.9.59-2.el8_8.1RHSA-2024:0584

Fixed in:1:0.9.59-3.el8RHSA-2023:7090

Fixed in:1:0.9.59-2.el8_8.1RHSA-2024:0584

Fixed in:1:0.9.59-3.el8RHSA-2023:7090

Fixed in:1:0.9.59-2.el8_6.1RHSA-2024:1109

Fixed in:1:0.9.59-3.el8RHSA-2023:7090

Fixed in:1:0.9.59-2.el8_6.1RHSA-2024:1109

Fixed in:1:0.9.59-3.el8RHSA-2023:7090

Fixed in:1:0.9.72-5.el9RHSA-2023:6566

libmicrohttpd-debugsourceRocky

Fixed in:1:0.9.59-2.el8_6.1RHSA-2024:1109

Fixed in:1:0.9.59-3.el8RHSA-2023:7090

Fixed in:1:0.9.59-2.el8_8.1RHSA-2024:0584

Fixed in:1:0.9.59-2.el8_6.1RHSA-2024:1109

Fixed in:1:0.9.59-2.el8_8.1RHSA-2024:0584

Fixed in:1:0.9.59-3.el8RHSA-2023:7090

Fixed in:1:0.9.59-2.el8_8.1RHSA-2024:0584

Fixed in:1:0.9.59-3.el8RHSA-2023:7090

Fixed in:1:0.9.59-2.el8_8.1RHSA-2024:0584

Fixed in:1:0.9.59-3.el8RHSA-2023:7090

Fixed in:1:0.9.59-2.el8_6.1RHSA-2024:1109

Fixed in:1:0.9.72-5.el9RHSA-2023:6566

libmicrohttpd-debugsourceRed Hat / RHEL

Fixed in:1:0.9.59-2.el8_8.1RHSA-2024:0584

Fixed in:1:0.9.59-3.el8RHSA-2023:7090

Fixed in:1:0.9.59-2.el8_8.1RHSA-2024:0584

Fixed in:1:0.9.59-3.el8RHSA-2023:7090

Fixed in:1:0.9.59-2.el8_8.1RHSA-2024:0584

Fixed in:1:0.9.59-2.el8_6.1RHSA-2024:1109

Fixed in:1:0.9.59-3.el8RHSA-2023:7090

Fixed in:1:0.9.59-2.el8_8.1RHSA-2024:0584

Fixed in:1:0.9.59-3.el8RHSA-2023:7090

Fixed in:1:0.9.59-2.el8_8.1RHSA-2024:0584

Fixed in:1:0.9.59-2.el8_6.1RHSA-2024:1109

Fixed in:1:0.9.59-3.el8RHSA-2023:7090

Fixed in:1:0.9.59-2.el8_6.1RHSA-2024:1109

Fixed in:1:0.9.72-5.el9RHSA-2023:6566

libmicrohttpd-develRocky

Fixed in:1:0.9.59-3.el8RHSA-2023:7090

Fixed in:1:0.9.59-2.el8_8.1RHSA-2024:0584

Fixed in:1:0.9.59-2.el8_6.1RHSA-2024:1109

Fixed in:1:0.9.59-3.el8RHSA-2023:7090

Fixed in:1:0.9.59-2.el8_6.1RHSA-2024:1109

Fixed in:1:0.9.59-3.el8RHSA-2023:7090

Fixed in:1:0.9.72-5.el9RHSA-2023:6566

libmicrohttpd-develRed Hat / RHEL

Fixed in:1:0.9.59-2.el8_6.1RHSA-2024:1109

Fixed in:1:0.9.59-2.el8_8.1RHSA-2024:0584

Fixed in:1:0.9.59-3.el8RHSA-2023:7090

Fixed in:1:0.9.59-2.el8_8.1RHSA-2024:0584

Fixed in:1:0.9.59-3.el8RHSA-2023:7090

Fixed in:1:0.9.59-2.el8_8.1RHSA-2024:0584

Fixed in:1:0.9.59-2.el8_6.1RHSA-2024:1109

Fixed in:1:0.9.59-3.el8RHSA-2023:7090

Fixed in:1:0.9.59-2.el8_6.1RHSA-2024:1109

Fixed in:1:0.9.59-3.el8RHSA-2023:7090

Fixed in:1:0.9.72-5.el9RHSA-2023:6566

libmicrohttpd-docRocky

Fixed in:1:0.9.59-2.el8_6.1RHSA-2024:1109

Fixed in:1:0.9.59-3.el8RHSA-2023:7090

Fixed in:1:0.9.59-2.el8_8.1RHSA-2024:0584

Fixed in:1:0.9.72-5.el9RHSA-2023:6566

libmicrohttpd-docRed Hat / RHEL

Fixed in:1:0.9.59-2.el8_8.1RHSA-2024:0584

Fixed in:1:0.9.59-3.el8RHSA-2023:7090

Fixed in:1:0.9.59-2.el8_6.1RHSA-2024:1109

Fixed in:1:0.9.72-5.el9RHSA-2023:6566

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityHigh

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploit Intelligence

1.24%probability of exploitation in 30 days

66thpercentile

Moderate risk: more likely to be exploited than 66% of all known CVEs.

References

Patch1

git.gnunet.org

Exploit1

github.com

Mailing List1

lists.gnu.org

Other references1

lists.debian.org

Related Vulnerabilities

Other CWE-125 (Out-of-bounds Read) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2014-0160	High	7.5	100%	KEV	Fix
CVE-2025-5777	High	7.5	100%	KEV + Ransom	Fix
CVE-2021-4034	High	7.8	95%	KEV	Fix
CVE-2023-21769	High	7.5	92%	-	Fix
CVE-2023-49285	High	8.6	89%	-	Fix
CVE-2020-8794	Critical	9.8	89%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.