Test ID:	1.3.6.1.4.1.25623.1.1.1.1.2023.5511
Category:	Debian Local Security Checks
Title:	Debian: Security Advisory (DSA-5511-1)
Summary:	The remote host is missing an update for the Debian 'mosquitto' package(s) announced via the DSA-5511-1 advisory.
Description:	Summary: The remote host is missing an update for the Debian 'mosquitto' package(s) announced via the DSA-5511-1 advisory. Vulnerability Insight: Several security vulnerabilities have been discovered in mosquitto, a MQTT compatible message broker, which may be abused for a denial of service attack. CVE-2021-34434 In Eclipse Mosquitto 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. CVE-2023-0809 Fix excessive memory being allocated based on malicious initial packets that are not CONNECT packets. CVE-2023-3592 Fix memory leak when clients send v5 CONNECT packets with a will message that contains invalid property types. CVE-2023-28366 The broker in Eclipse Mosquitto has a memory leak that can be abused remotely when a client sends many QoS 2 messages with duplicate message IDs, and fails to respond to PUBREC commands. This occurs because of mishandling of EAGAIN from the libc send function. Additionally CVE-2021-41039 has been fixed for Debian 11 Bullseye. CVE-2021-41039 An MQTT v5 client connecting with a large number of user-property properties could cause excessive CPU usage, leading to a loss of performance and possible denial of service. For the oldstable distribution (bullseye), these problems have been fixed in version 2.0.11-1+deb11u1. For the stable distribution (bookworm), these problems have been fixed in version 2.0.11-1.2+deb12u1. We recommend that you upgrade your mosquitto packages. For the detailed security status of mosquitto please refer to its security tracker page at: [link moved to references] Affected Software/OS: 'mosquitto' package(s) on Debian 11, Debian 12. Solution: Please install the updated package(s). CVSS Score: 5.0 CVSS Vector: AV:N/AC:L/Au:N/C:P/I:N/A:N
Cross-Ref:	Common Vulnerability Exposure (CVE) ID: CVE-2021-34434 https://bugs.eclipse.org/bugs/show_bug.cgi?id=575324 Debian Security Information: DSA-5511 (Google Search) https://www.debian.org/security/2023/dsa-5511 https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/K4WWGVF5BUFPYPCFUPPP4KRIYI5OTJN2/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RLUUM52Y6AEICPXPSRRXC6OBY4H5XKW7/ Common Vulnerability Exposure (CVE) ID: CVE-2023-0809 https://security.gentoo.org/glsa/202401-09 https://mosquitto.org/blog/2023/08/version-2-0-16-released/ Common Vulnerability Exposure (CVE) ID: CVE-2023-28366 https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/KJ2FMBGVVQEQWTTQB7YLKTAHMX2UM66X/ https://github.com/eclipse/mosquitto/compare/v2.0.15...v2.0.16 https://www.compass-security.com/fileadmin/Research/Advisories/2023_02_CSNC-2023-001_Eclipse_Mosquitto_Memory_Leak.txt Common Vulnerability Exposure (CVE) ID: CVE-2023-3592
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