Libmodbus
CVE-2022-0367
HIGH
Vulnerability Assessment
| Weakness |
CWE
ASVS 5.0
V15 - Secure Coding and Architecture Bounds checking, buffer size validation
MITRE ATT&CK
2 techniques across 2 tactics: Execution, Privilege Escalation The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Impact | CVSS score of 7.8 (HIGH). Attack characteristics: local attack vector, low complexity, no privileges required, user interaction required. Public proof-of-concept exploit code is available. |
| Exploit ScenarioDerived | A local attacker with access to the system could corrupt memory to execute arbitrary code or crash the application. No authentication is required to exploit this vulnerability. |
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Alert meAnalysisAI
A heap-based buffer overflow flaw was found in libmodbus in function modbus_reply() in src/modbus.c. Rated high severity (CVSS 7.8), this vulnerability is no authentication required, low attack complexity. Public exploit code available.
RemediationAI
A vendor patch is available. Apply the latest security update as soon as possible. Use memory-safe languages or bounds-checking. Enable ASLR, DEP/NX, stack canaries. Use safe string functions.
Affects your stack
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Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
This vulnerability is classified as Buffer Overflow (CWE-119), which allows attackers to corrupt memory to execute arbitrary code or crash the application. A heap-based buffer overflow flaw was found in libmodbus in function modbus_reply() in src/modbus.c. Affected products include: Libmodbus, Fedoraproject Extra Packages For Enterprise Linux, Fedoraproject Fedora, Debian Debian Linux.
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- Exploit and PoC references, threat intelligence from 22 sources
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Severity by source
AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
DescriptionNVD
A heap-based buffer overflow flaw was found in libmodbus in function modbus_reply() in src/modbus.c.
Threat Intelligence Overview
NVD
CVE.org
EPSS
GitHub
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
A buffer overflow occurs when a program writes more data to a memory buffer than it was allocated to hold, causing the excess data to spill into adjacent memory regions.
Affected Products (CPE)NVD
libmodbus v3.1.6 was discovered to contain a use-after-free via the ctx->backend pointer. Rated high severity (CVSS 7.5)
libmodbus v3.1.6 was discovered to contain a heap overflow via the modbus_mapping_free() function. Rated high severity (
libmodbus v3.1.10 is vulnerable to Buffer Overflow via the modbus_write_bits function. Rated high severity (CVSS 7.5), t
Stack-based buffer overflow in libmodbus 3.1.10 lets an attacker overrun the fixed response buffer when the library buil
An issue was discovered in libmodbus before 3.0.7 and 3.1.x before 3.1.5. Rated critical severity (CVSS 9.1), this vulne
An issue was discovered in libmodbus before 3.0.7 and 3.1.x before 3.1.5. Rated critical severity (CVSS 9.1), this vulne
An invalid pointer in the modbus_receive() function of libmodbus v3.1.6 allows attackers to cause a Denial of Service (D
Exploit-DB