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CBL Mariner 2.0 Security Update: nginx / vsftpd (CVE-2021-3618)

high Nessus Plugin ID 172913

Synopsis

The remote CBL Mariner host is missing one or more security updates.

Description

The version of nginx / vsftpd installed on the remote CBL Mariner 2.0 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the CVE-2021-3618 advisory.

 - ALPACA is an application layer protocol content confusion attack, exploiting TLS servers implementing different protocols but using compatible certificates, such as multi-domain or wildcard certificates. A MiTM attacker having access to victim's traffic at the TCP/IP layer can redirect traffic from one subdomain to another, resulting in a valid TLS session. This breaks the authentication of TLS and cross- protocol attacks may be possible where the behavior of one protocol service may compromise the other at the application layer. (CVE-2021-3618)

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

Solution

Update the affected packages.

See Also

https://nvd.nist.gov/vuln/detail/CVE-2021-3618

Plugin Details

Severity: High

ID: 172913

File Name: mariner_nginx_vsftpd_CVE-2021-3618.nasl

Version: 1.0

Type: local

Published: 3/20/2023

Updated: 3/20/2023

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.2

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-2021-3618

CVSS v3

Risk Factor: High

Base Score: 7.4

Temporal Score: 6.4

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

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

Vulnerability Information

CPE: p-cpe:/a:microsoft:cbl-mariner:nginx, p-cpe:/a:microsoft:cbl-mariner:nginx-debuginfo, p-cpe:/a:microsoft:cbl-mariner:nginx-filesystem, p-cpe:/a:microsoft:cbl-mariner:vsftpd, p-cpe:/a:microsoft:cbl-mariner:vsftpd-debuginfo, x-cpe:/o:microsoft:cbl-mariner

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/CBLMariner/release, Host/CBLMariner/rpm-list

Exploit Ease: No known exploits are available

Patch Publication Date: 4/12/2022

Vulnerability Publication Date: 10/25/2021

Reference Information

CVE: CVE-2021-3618