Debian dla-3564 : e2guardian - security update

high Nessus Plugin ID 181320

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Synopsis

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

Description

The remote Debian 10 host has a package installed that is affected by a vulnerability as referenced in the dla-3564 advisory.

- ------------------------------------------------------------------------- Debian LTS Advisory DLA-3564-1 [email protected] https://www.debian.org/lts/security/ Chris Lamb September 12, 2023 https://wiki.debian.org/LTS
- -------------------------------------------------------------------------

Package : e2guardian Version : 5.3.1-1+deb10u1 CVE ID : CVE-2021-44273 Debian Bug : 1003125

It was discovered that there was a potential Man In the Middle (MITM) vulnerability in e2guardian, a web content filtering engine.

Validation of SSL certificates was missing in e2guardian's own MITM prevention engine. In standalone mode (ie. acting as a proxy or a transparent proxy) with SSL MITM enabled, e2guardian did not validate hostnames in certificates of the web servers that it connected to, and thus was itself vulnerable to MITM attacks.

For Debian 10 buster, this problem has been fixed in version 5.3.1-1+deb10u1.

We recommend that you upgrade your e2guardian packages.

For the detailed security status of e2guardian please refer to its security tracker page at:
https://security-tracker.debian.org/tracker/e2guardian

Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: https://wiki.debian.org/LTS

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 e2guardian packages.

Plugin Details

Severity: High

ID: 181320

File Name: debian_DLA-3564.nasl

Version: 1.1

Type: local

Agent: unix

Family: Debian Local Security Checks

Published: 9/12/2023

Updated: 1/22/2025

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

Risk Information

VPR

Risk Factor: Medium

Score: 6.0

CVSS v2

Risk Factor: Medium

Base Score: 5.8

Temporal Score: 4.5

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

CVSS Score Source: CVE-2021-44273

CVSS v3

Risk Factor: High

Base Score: 7.4

Temporal Score: 6.7

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:P/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:debian:debian_linux:10.0, p-cpe:/a:debian:debian_linux:e2guardian

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 9/12/2023

Vulnerability Publication Date: 12/23/2021

Reference Information

CVE: CVE-2021-44273

Detections

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