CVE-2021-45936

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Published Dec 31, 2021 CVSS 3.1 · 5.5 Medium EPSS < 1% KEV · Not listed

Description

wolfSSL wolfMQTT 1.9 has a heap-based buffer overflow in MqttDecode_Disconnect (called from MqttClient_DecodePacket and MqttClient_WaitType).

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

n/a

n/a

affected

Version	Status	Constraints
`n/a`	affected	—

Configuration 1 [-]

cpe:2.3:a:wolfssl:wolfmqtt:1.9:*:*:*:*:*:*:*

No data.

No data available yet.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source	ID	Title
EUVD	EUVD-2021-32645	wolfSSL wolfMQTT 1.9 has a heap-based buffer overflow in MqttDecode_Disconnect (called from MqttClient_DecodePacket and MqttClient_WaitType).

Metrics

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction Required

No CVSS v3.0

Access Vector Network

Access Complexity Medium

Authentication None

Confidentiality Impact None

Integrity Impact None

Availability Impact Partial

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.917% probability within 30 days)

Key SSVC decision points have not yet been added.

References

Link	Providers
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=39053
https://github.com/google/oss-fuzz-vulns/blob/main/vulns/wolfmqtt/OSV-2021-1348.yaml
https://github.com/wolfSSL/wolfMQTT/commit/84d4b53122e0fa0280c7872350b89d5777dabbb2

History

No history.

Subscriptions

Wolfssl Wolfmqtt

Weaknesses

CWE-787

Sources

CVE record Updated: Aug 4, 2024, 4:54 AM

Status: PUBLISHED
Assigner: mitre
Published: Dec 31, 2021, 11:57 PM
Updated: Aug 4, 2024, 4:54 AM
Reserved: Dec 31, 2021, 12:00 AM

View source JSON

Vulnrichment No data

No data.

NVD Updated: Jun 17, 2026, 4:14 AM

Status: Modified
Published: Jan 1, 2022, 1:15 AM
Modified: Jun 17, 2026, 4:14 AM

View source JSON

Red Hat No data

No data.

OpenCVE enrichment No data

No data.

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