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CVE-2021-34434

Status Candidate

Overview

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.

Related Files

Ubuntu Security Notice USN-6492-1
Posted Nov 21, 2023
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6492-1 - Kathrin Kleinhammer discovered that Mosquitto incorrectly handled certain inputs. If a user or an automated system were provided with a specially crafted input, a remote attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 20.04 LTS. Zhanxiang Song discovered that Mosquitto incorrectly handled certain inputs. If a user or an automated system were provided with a specially crafted input, a remote attacker could possibly use this issue to cause an authorisation bypass. This issue only affected Ubuntu 22.04 LTS and Ubuntu 23.04.

tags | advisory, remote, denial of service
systems | linux, ubuntu
advisories | CVE-2021-34431, CVE-2021-34434, CVE-2021-41039, CVE-2023-0809, CVE-2023-28366, CVE-2023-3592
SHA-256 | 8afa51ddd6fc11641b55e0d1a848ec61be70bbc1dbd56775c52c42cf1a85cb07
Debian Security Advisory 5511-1
Posted Oct 2, 2023
Authored by Debian | Site debian.org

Debian Linux Security Advisory 5511-1 - Several security vulnerabilities have been discovered in mosquitto, a MQTT compatible message broker, which may be abused for a denial of service attack.

tags | advisory, denial of service, vulnerability
systems | linux, debian
advisories | CVE-2021-34434, CVE-2021-41039, CVE-2023-0809, CVE-2023-28366, CVE-2023-3592
SHA-256 | 1518e0099ccd906d33af69afafa10ef3ebd6d28f34c143d4f89b8e793d316b29
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