In Eclipse Mosquitto version 2.0.0 to 2.0.9, if an authenticated client that had connected with MQTT v5 sent a crafted CONNACK message to the broker, a NULL pointer dereference would occur.
Published 2021-04-07 19:15:12
Updated 2021-04-13 21:42:16
View at NVD,   CVE.org
Vulnerability category: Memory Corruption

Products affected by CVE-2021-28166

Exploit prediction scoring system (EPSS) score for CVE-2021-28166

0.05%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 19 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-28166

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
4.0
MEDIUM AV:N/AC:L/Au:S/C:N/I:N/A:P
8.0
2.9
NIST
6.5
MEDIUM CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
2.8
3.6
Eclipse Foundation
6.5
MEDIUM CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
2.8
3.6
NIST

CWE ids for CVE-2021-28166

  • The product dereferences a pointer that it expects to be valid but is NULL.
    Assigned by:
    • emo@eclipse.org (Secondary)
    • nvd@nist.gov (Primary)

References for CVE-2021-28166

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