Debian DSA-5009-1 : tomcat9 - security update

high Nessus Plugin ID 155317

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Synopsis

The remote Debian host is missing a security-related update.

Description

The remote Debian 11 host has packages installed that are affected by a vulnerability as referenced in the dsa-5009 advisory.

Apache Tomcat, the servlet and JSP engine, did not properly release an HTTP upgrade connection for WebSocket connections once the WebSocket connection was closed. This created a memory leak that, over time, could lead to a denial of service via an OutOfMemoryError. For the stable distribution (bullseye), this problem has been fixed in version 9.0.43-2~deb11u3. We recommend that you upgrade your tomcat9 packages. For the detailed security status of tomcat9 please refer to its security tracker page at:
https://security-tracker.debian.org/tracker/tomcat9

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Upgrade the tomcat9 packages.

For the stable distribution (bullseye), this problem has been fixed in version 9.0.43-2~deb11u3.

Plugin Details

Severity: High

ID: 155317

File Name: debian_DSA-5009.nasl

Version: 1.4

Type: local

Agent: unix

Family: Debian Local Security Checks

Published: 11/12/2021

Updated: 1/24/2025

Supported Sensors: Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P

CVSS Score Source: CVE-2021-42340

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:tomcat9-docs, cpe:/o:debian:debian_linux:11.0, p-cpe:/a:debian:debian_linux:tomcat9-admin, p-cpe:/a:debian:debian_linux:libtomcat9-java, p-cpe:/a:debian:debian_linux:tomcat9, p-cpe:/a:debian:debian_linux:tomcat9-user, p-cpe:/a:debian:debian_linux:libtomcat9-embed-java, p-cpe:/a:debian:debian_linux:tomcat9-examples, p-cpe:/a:debian:debian_linux:tomcat9-common

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Exploit Ease: No known exploits are available

Patch Publication Date: 11/12/2021

Vulnerability Publication Date: 10/1/2021

Reference Information

CVE: CVE-2021-42340

IAVA: 2021-A-0479-S

Detections

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