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Debian DSA-4986-1 : tomcat9 - security update

medium Nessus Plugin ID 154177

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Synopsis

The remote Debian host is missing one or more security-related updates.

Description

The remote Debian 10 / 11 host has packages installed that are affected by multiple vulnerabilities as referenced in the dsa-4986 advisory.

 - A vulnerability in the JNDI Realm of Apache Tomcat allows an attacker to authenticate using variations of a valid user name and/or to bypass some of the protection provided by the LockOut Realm. This issue affects Apache Tomcat 10.0.0-M1 to 10.0.5; 9.0.0.M1 to 9.0.45; 8.5.0 to 8.5.65. (CVE-2021-30640)

 - Apache Tomcat 8.5.0 to 8.5.63, 9.0.0-M1 to 9.0.43 and 10.0.0-M1 to 10.0.2 did not properly validate incoming TLS packets. When Tomcat was configured to use NIO+OpenSSL or NIO2+OpenSSL for TLS, a specially crafted packet could be used to trigger an infinite loop resulting in a denial of service.
 (CVE-2021-41079)

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), these problems have been fixed in version 9.0.43-2~deb11u2.

See Also

https://security-tracker.debian.org/tracker/source-package/tomcat9

https://www.debian.org/security/2021/dsa-4986

https://security-tracker.debian.org/tracker/CVE-2021-30640

https://security-tracker.debian.org/tracker/CVE-2021-41079

https://packages.debian.org/source/buster/tomcat9

https://packages.debian.org/source/bullseye/tomcat9

Plugin Details

Severity: Medium

ID: 154177

File Name: debian_DSA-4986.nasl

Version: 1.2

Type: local

Agent: unix

Published: 10/15/2021

Updated: 10/15/2021

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

Risk Information

VPR

Risk Factor: Medium

Score: 4.2

CVSS v2

Risk Factor: Medium

Base Score: 5.8

Temporal Score: 4.3

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

CVSS Score Source: CVE-2021-30640

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.7

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

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, cpe:/o:debian:debian_linux:10.0, 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: 10/14/2021

Vulnerability Publication Date: 3/10/2021

Reference Information

CVE: CVE-2021-30640, CVE-2021-41079