mosquitto: CVE-2021-41039: Possible DoS Attack caused by unlimited number of "user properties"

Debian Bug report logs - #1001028
mosquitto: CVE-2021-41039: Possible DoS Attack caused by unlimited number of "user properties"

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Message #5 received at submit@bugs.debian.org (full text, mbox, reply):

From: Salvatore Bonaccorso <carnil@debian.org>

To: Debian Bug Tracking System <submit@bugs.debian.org>

Subject: mosquitto: CVE-2021-34434: Possible DoS Attack caused by unlimited number of "user properties"

Date: Thu, 02 Dec 2021 22:16:38 +0100

Source: mosquitto
Version: 2.0.11-1
Severity: important
Tags: security upstream
Forwarded: https://bugs.eclipse.org/bugs/show_bug.cgi?id=575314
X-Debbugs-Cc: carnil@debian.org, Debian Security Team <team@security.debian.org>

Hi,

The following vulnerability was published for mosquitto.

CVE-2021-34434[0]:
| In Eclipse Mosquitto versions 2.0 to 2.0.11, when using the dynamic
| security plugin, if the ability for a client to make subscriptions on
| a topic is revoked when a durable client is offline, then existing
| subscriptions for that client are not revoked.


If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.

For further information see:

[0] https://security-tracker.debian.org/tracker/CVE-2021-34434
    https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-34434
[1] https://bugs.eclipse.org/bugs/show_bug.cgi?id=575314
[2] https://github.com/eclipse/mosquitto/commit/9d6a73f9f72005c2f19a262f15d28327eedea91f

Regards,
Salvatore

Message #10 received at 1001028@bugs.debian.org (full text, mbox, reply):

From: Salvatore Bonaccorso <carnil@debian.org>

To: 1001028@bugs.debian.org

Subject: Re: Bug#1001028: mosquitto: CVE-2021-41039: Possible DoS Attack caused by unlimited number of "user properties"

Date: Thu, 2 Dec 2021 22:23:07 +0100

Control: retitle -1 mosquitto: CVE-2021-41039: Possible DoS Attack caused by unlimited number of "user properties"

Hi

On Thu, Dec 02, 2021 at 10:16:38PM +0100, Salvatore Bonaccorso wrote:
> Source: mosquitto
> Version: 2.0.11-1
> Severity: important
> Tags: security upstream
> Forwarded: https://bugs.eclipse.org/bugs/show_bug.cgi?id=575314
> X-Debbugs-Cc: carnil@debian.org, Debian Security Team <team@security.debian.org>
> 
> Hi,
> 
> The following vulnerability was published for mosquitto.
> 
> CVE-2021-34434[0]:
> | In Eclipse Mosquitto versions 2.0 to 2.0.11, when using the dynamic
> | security plugin, if the ability for a client to make subscriptions on
> | a topic is revoked when a durable client is offline, then existing
> | subscriptions for that client are not revoked.

Apologies, something went wrong when I now filled this bugreport. Here
are the corrections, this is about CVE-2021-41039.

Upstream report:

https://bugs.eclipse.org/bugs/show_bug.cgi?id=575314

Fixed by:

https://github.com/eclipse/mosquitto/commit/9d6a73f9f72005c2f19a262f15d28327eedea91f

Regards,
Salvatore

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