Vulnerability Details : CVE-2021-45938

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

Vulnerability category: OverflowMemory Corruption

Published 2022-01-01 01:15:09

Updated 2022-01-11 21:20:55

Source MITRE

View at NVD, CVE.org

Exploit prediction scoring system (EPSS) score for CVE-2021-45938

Probability of exploitation activity in the next 30 days: 0.11%

Percentile, the proportion of vulnerabilities that are scored at or less: ~ 44 % EPSS Score History EPSS FAQ

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Source
4.3	MEDIUM	AV:N/AC:M/Au:N/C:N/I:N/A:P	8.6	2.9	nvd@nist.gov
Access Vector: Network Access Complexity: Medium Authentication: None Confidentiality Impact: None Integrity Impact: None Availability Impact: Partial
5.5	MEDIUM	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H	1.8	3.6	nvd@nist.gov
Attack Vector: Local Attack Complexity: Low Privileges Required: None User Interaction: Required Scope: Unchanged Confidentiality: None Integrity: None Availability: High

CWE-787 Out-of-bounds Write

The product writes data past the end, or before the beginning, of the intended buffer.

Assigned by: nvd@nist.gov (Primary)

https://github.com/google/oss-fuzz-vulns/blob/main/vulns/wolfmqtt/OSV-2021-1353.yaml

oss-fuzz-vulns/OSV-2021-1353.yaml at main · google/oss-fuzz-vulns · GitHub
Exploit;Third Party Advisory
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=39056

39056 - wolfmqtt:wolfmqtt-fuzzer: Heap-buffer-overflow in MqttClient_DecodePacket - oss-fuzz
Exploit;Issue Tracking;Third Party Advisory
https://github.com/wolfSSL/wolfMQTT/commit/84d4b53122e0fa0280c7872350b89d5777dabbb2

Fix wolfmqtt-fuzzer: Null-dereference WRITE in MqttProps_Free · wolfSSL/wolfMQTT@84d4b53 · GitHub
Patch;Third Party Advisory

CVEs referencing this url

Wolfssl » Wolfmqtt » Version: 1.9
cpe:2.3:a:wolfssl:wolfmqtt:1.9:*:*:*:*:*:*:*
Matching versions