VDB-189530 · CVE-2021-45934 · GCVE-0-2021-45934

wolfSSL wolfMQTT 1.9 MqttClient_DecodePacket heap-based overflow

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.3	$0-$5k	0.00

Summaryinfo

A vulnerability described as critical has been identified in wolfSSL wolfMQTT 1.9. Affected by this vulnerability is the function MqttClient_DecodePacket. Such manipulation leads to heap-based overflow. This vulnerability is referenced as CVE-2021-45934. No exploit is available. A patch should be applied to remediate this issue.

Detailsinfo

A vulnerability was found in wolfSSL wolfMQTT 1.9. It has been rated as critical. Affected by this issue is the function MqttClient_DecodePacket. 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 confidentiality, integrity, and availability.

The weakness was published 01/01/2022. The advisory is available at bugs.chromium.org. This vulnerability is handled as CVE-2021-45934 since 12/31/2021. Technical details are known, but there is no available exploit.

Applying the patch 84d4b53122e0fa0280c7872350b89d5777dabbb2 is able to eliminate this problem. The bugfix is ready for download at github.com.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Vendor

wolfSSL

Name

wolfMQTT

Version

License

open-source

Website

Product: https://github.com/wolfSSL/wolfMQTT/

CPE 2.3info

🔍

CPE 2.2info

🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.3

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

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: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: 84d4b53122e0fa0280c7872350b89d5777dabbb2

Timelineinfo

12/31/2021 🔍
01/01/2022 +1 days 🔍
01/01/2022 +0 days 🔍
01/05/2022 +4 days 🔍

Sourcesinfo

Product: github.com

Advisory: 84d4b53122e0fa0280c7872350b89d5777dabbb2
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2021-45934 (🔍)
GCVE (CVE): GCVE-0-2021-45934
GCVE (VulDB): GCVE-100-189530

Entryinfo

Created: 01/01/2022 10:32
Updated: 01/05/2022 13:54
Changes: 01/01/2022 10:32 (41), 01/05/2022 13:54 (2)
Complete: 🔍
Cache ID: 216::103