NanoMQ 0.21.7 Hexstreams mqtt_parser.c get_var_integer buffer overflow

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.1$0-$5k0.00

Summaryinfo

A vulnerability classified as critical has been found in NanoMQ 0.21.7. This vulnerability affects the function get_var_integer of the file mqtt_parser.c of the component Hexstreams Handler. The manipulation leads to buffer overflow. This vulnerability is uniquely identified as CVE-2024-31040. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability, which was classified as critical, has been found in NanoMQ 0.21.7. This issue affects the function get_var_integer of the file mqtt_parser.c of the component Hexstreams Handler. The manipulation with an unknown input leads to a buffer overflow vulnerability. Using CWE to declare the problem leads to CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Buffer Overflow vulnerability in the get_var_integer function in mqtt_parser.c in NanoMQ 0.21.7 allows remote attackers to cause a denial of service via a series of specially crafted hexstreams.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2024-31040 since 03/27/2024. The exploitation is known to be easy. The attack may be initiated remotely. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 06/10/2025).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Name

Version

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.1

VulDB Base Score: 6.3
VulDB Temp Score: 6.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Buffer overflow
CWE: CWE-120 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

03/27/2024 🔍
04/17/2024 +20 days 🔍
04/17/2024 +0 days 🔍
06/10/2025 +419 days 🔍

Sourcesinfo

Product: github.com

Advisory: 1720
Status: Not defined

CVE: CVE-2024-31040 (🔍)
GCVE (CVE): GCVE-0-2024-31040
GCVE (VulDB): GCVE-100-261407

Entryinfo

Created: 04/17/2024 21:20
Updated: 06/10/2025 06:06
Changes: 04/17/2024 21:20 (53), 05/24/2024 13:36 (1), 06/10/2025 06:06 (2)
Complete: 🔍
Cache ID: 216::103

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