PT-2024-27178 · Libmodbus+3 · Libmodbus+3

Balckgu1O · Published 2024-05-31 · Updated 2025-05-06 · CVE-2024-36844

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

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

Name of the Vulnerable Software and Affected Versions libmodbus version 3.1.6

Description A use-after-free issue was discovered in libmodbus via the ctx->backend pointer. This issue allows attackers to cause a Denial of Service (DoS) by sending a crafted message to the unit-test-server.

Recommendations For libmodbus version 3.1.6, consider disabling the use of the ctx->backend pointer until a patch is available to prevent potential Denial of Service (DoS) attacks. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

DoS

Use After Free

Weakness Enumeration

CWE-416

Related Identifiers

ALT-PU-2025-6305

CVE-2024-36844

DLA-4084-1

Affected Products

Alt Linux

Astra Linux

Debian

Libmodbus

References · 13

• https://github.com/stephane/libmodbus/issues/749 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-36844 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2024-36844 · Security Note
• https://osv.dev/vulnerability/CVE-2024-36844 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2024-36844 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2024-36844 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2024-36844 · Vendor Advisory
• https://osv.dev/vulnerability/DLA-4084-1 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2024-36844 · Security Note
• https://t.me/cvenotify/81662 · Telegram Post
• https://t.me/cvenotify/81780 · Telegram Post
• https://lists.debian.org/debian-lts-announce/2025/03/msg00010.html · Note
• https://t.me/cvenotify/120471 · Telegram Post