Bug 1985547 (CVE-2021-34431) - CVE-2021-34431 mosquitto: memory leak can lead to DoS
Summary: CVE-2021-34431 mosquitto: memory leak can lead to DoS
Keywords:
Status: CLOSED UPSTREAM
Alias: CVE-2021-34431
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1985548 1985549
Blocks:
TreeView+ depends on / blocked
 
Reported: 2021-07-23 20:38 UTC by Guilherme de Almeida Suckevicz
Modified: 2021-07-23 22:46 UTC (History)
3 users (show)

Fixed In Version:
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Last Closed: 2021-07-23 22:46:53 UTC
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Description Guilherme de Almeida Suckevicz 2021-07-23 20:38:42 UTC 
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.

Reference:
https://bugs.eclipse.org/bugs/show_bug.cgi?id=573191
Comment 1 Guilherme de Almeida Suckevicz 2021-07-23 20:39:01 UTC 
Created mosquitto tracking bugs for this issue:

Affects: epel-all [bug 1985549]
Affects: fedora-all [bug 1985548]
Comment 2 Product Security DevOps Team 2021-07-23 22:46:53 UTC 
This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.
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