PT-2024-27177 · Libmodbus+3 · Libmodbus+3

Balckgu1O · Published 2024-05-31 · Updated 2025-05-06 · CVE-2024-36843

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 heap overflow issue was discovered via the modbus mapping free() function. This issue affects libmodbus and can be exploited, but specific details about the number of potentially affected devices or real-world incidents are not provided.

Recommendations For libmodbus version 3.1.6, consider disabling the modbus mapping free() function as a temporary workaround until a patch is available.

Exploit

Fix

Heap Based Buffer Overflow

Weakness Enumeration

CWE-122

Related Identifiers

ALT-PU-2025-6305

CVE-2024-36843

DLA-4084-1

Affected Products

Alt Linux

Astra Linux

Debian

Libmodbus

References · 15

• 🔥 https://github.com/balckgu1/libmodbusPoc/blob/main/gdb.md · Exploit
• https://github.com/stephane/libmodbus/issues/748 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2024-36843 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2024-36843 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2024-36843 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2024-36843 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2024-36843 · Security Note
• https://ubuntu.com/security/CVE-2024-36843 · Vendor Advisory
• https://osv.dev/vulnerability/DLA-4084-1 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2024-36843 · Security Note
• https://t.me/cvenotify/91781 · Telegram Post
• https://t.me/cvenotify/85594 · Telegram Post
• https://t.me/cvenotify/81779 · Telegram Post
• https://lists.debian.org/debian-lts-announce/2025/03/msg00010.html · Note
• https://t.me/cvenotify/81661 · Telegram Post