emqx NanoMQ 0.17.2 mqtt_parser.c nmq_subinfo_decode heap-based overflow

CVSS Meta Temp Score
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CTI Interest Score
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6.1$0-$5k0.00

Summaryinfo

A vulnerability classified as critical was found in emqx NanoMQ 0.17.2. This affects the function nmq_subinfo_decode of the file mqtt_parser.c. Such manipulation leads to heap-based overflow. This vulnerability is traded as CVE-2023-33659. There is no exploit available. It is advisable to implement a patch to correct this issue.

Detailsinfo

A vulnerability was found in emqx NanoMQ 0.17.2. It has been rated as problematic. Affected by this issue is the function nmq_subinfo_decode of the file mqtt_parser.c. The manipulation with an unknown input leads to a heap-based overflow vulnerability. Using CWE to declare the problem leads to CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). Impacted is availability. CVE summarizes:

A heap buffer overflow vulnerability exists in NanoMQ 0.17.2. The vulnerability can be triggered by calling the function nmq_subinfo_decode() in the file mqtt_parser.c. An attacker could exploit this vulnerability to cause a denial of service attack.

The weakness was shared 06/06/2023 as 1154. The advisory is shared for download at github.com. This vulnerability is handled as CVE-2023-33659 since 05/22/2023. There are known technical details, but no exploit is available.

Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2023-37815). Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

Name

Version

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.2
VulDB Meta Temp Score: 6.1

VulDB Base Score: 3.5
VulDB Temp Score: 3.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CNA Base Score: 7.5
CNA Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Heap-based overflow
CWE: CWE-122 / 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: Patch
Status: 🔍

0-Day Time: 🔍

Patch: github.com

Timelineinfo

05/22/2023 🔍
06/06/2023 +15 days 🔍
06/06/2023 +0 days 🔍
01/05/2026 +944 days 🔍

Sourcesinfo

Product: github.com

Advisory: 1154
Status: Confirmed

CVE: CVE-2023-33659 (🔍)
GCVE (CVE): GCVE-0-2023-33659
GCVE (VulDB): GCVE-100-230804
EUVD: 🔍

Entryinfo

Created: 06/06/2023 15:08
Updated: 01/05/2026 15:23
Changes: 06/06/2023 15:08 (42), 06/30/2023 14:57 (11), 01/08/2025 20:59 (26), 01/05/2026 15:23 (1)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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