CVE-2021-34431

Advisory lineage Upstream: 0 Downstream: 3
Modified
Published: 22 Jul 2021, 13:45
Last modified:04 Aug 2024, 00:12

Vulnerability Summary

Overall Risk (default)
medium
26/100
CVSS Score
6.5 MEDIUM
v3.1 (nvd)
EPSS Score
0.37% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

22 Jul 2021, 13:45
Published
Vulnerability first disclosed
04 Aug 2024, 00:12
Last Modified
Vulnerability information updated

Description

In Eclipse Mosquitto version 1.6 to 2.0.10, if an authenticated client that had connected with MQTT v5 sent a crafted CONNECT message to the broker a memory leak would occur, which could be used to provide a DoS attack against the broker.

CVSS Metrics

  • v3.1•MEDIUM•Score: 6.5CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
  • v2.0•MEDIUM•Score: 4AV:N/AC:L/Au:S/C:N/I:N/A:P

EPSS Trends

Current EPSS score: 0.37%• Percentile: 59%

Techniques & Countermeasures

  • CWE-401•Missing Release of Memory after Effective Lifetime

    The product does not sufficiently track and release allocated memory after it has been used, making the memory unavailable for reallocation and reuse.

Affected Systems

  • eclipse•mosquitto

    ≥ 1.6, ≤ 2.0.10

  • the eclipse foundation•eclipse mosquitto

    ≥ 1.6, < unspecified | ≥ unspecified, ≤ 2.0.10

References (1)